In deze sectie wordt de aaneenschakeling van twee of meer strings in de programmeertaal C++ besproken. De aaneenschakeling van de string betekent de groep tekens die nog twee strings combineert om een aaneengeschakelde enkele string terug te geven. Terwijl de strings aaneengeschakeld worden, wordt de tweede string aan het einde van de eerste string toegevoegd om één enkele string te maken.
We hebben bijvoorbeeld twee tekenreeksen, ' Java ' En ' Tpunt ', en we willen aaneenschakelen om een enkele string te maken als Java + Tpoint = JavaTpoint.
Laten we de verschillende manieren bespreken om de gegeven string samen te voegen in de programmeertaal C++.
- Voeg twee strings samen met behulp van een for-lus
- Voeg twee strings samen met de while-lus
- Voeg twee tekenreeksen samen met de operator +
- Voeg twee tekenreeksen samen met de functie strcat().
- Voeg twee tekenreeksen samen met de functie append().
- Voeg twee tekenreeksen samen met behulp van overerving
- Voeg twee tekenreeksen samen met de vriendfunctie en de strcat()-functie
Programma om twee strings samen te voegen met behulp van een for-lus
Laten we een voorbeeld bekijken waarin twee strings worden gecombineerd met behulp van een for-lus in de C++-programmering.
Programma.cpp
k naaste buur
#include using namespace std; int main () { string str1, str2, result; // declare string variables int i; cout <> str1; // take string cout <> str2; // take second string // use for loop to enter the characters of the str1 into result string for ( i = 0; i <str1.size(); i++) { result="result" + str1[i]; add character of the str1 into } use for loop to enter characters str2 string ( i="0;" < str2.size(); str2[i]; cout << ' concatenation and is <<result; return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The Concatenation of the string Java and Tpoint is JavaTpoint </pre> <h3>Program to concatenate two strings using while loop</h3> <p>Let's consider an example to combine two strings using a while loop in C++ programming.</p> <p> <strong>Program2.cpp</strong> </p> <pre> #include using namespace std; int main () { // declare and initialize the string char str1[100] = ' We Love'; char str2[100] = ' C++ Programming Language'; int i, j; // declare variable cout << ' The first string is: ' << str1 << endl; cout << ' The second string is: '<< str2 <<endl; for (i="0;" str1[i] !=" " ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << ' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic '+'operator that simply adds two strings to return a new concatenated string.</p> <p>Let's consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<' is: ' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << ' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<'
the concatenated string is: ' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<' 100 enter the first string: '; cin.getline (st, 100); take a line of string with limit cout <<' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated ' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></'></pre></'></pre></str1></pre></'></pre></endl;></pre></str1.size();> Programma om twee strings samen te voegen met behulp van while-lus
Laten we een voorbeeld bekijken waarin twee strings worden gecombineerd met behulp van een while-lus in C++-programmering.
Programma2.cpp
#include using namespace std; int main () { // declare and initialize the string char str1[100] = ' We Love'; char str2[100] = ' C++ Programming Language'; int i, j; // declare variable cout << ' The first string is: ' << str1 << endl; cout << ' The second string is: '<< str2 <<endl; for (i="0;" str1[i] !=" " ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << \' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic '+'operator that simply adds two strings to return a new concatenated string.</p> <p>Let's consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'></pre></endl;> Programma om twee tekenreeksen samen te voegen met behulp van de operator + in C++
+ Operator: Het is een rekenkundige '+'-operator die eenvoudigweg twee strings optelt om een nieuwe aaneengeschakelde string te retourneren.
Laten we een voorbeeld bekijken waarin twee tekenreeksen worden gecombineerd met de operator + in programmeren in C++.
Programma3.cpp
#include using namespace std; int main () { string str1, str2; // declare string variables cout <> str1; cout <> str2; // use '+' operator to concatenate the str1 and str2 string result = str1 + str2; cout << ' The concatenated string ' << str1 << ' and ' << str2 <<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let's consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'> Programma om twee strings samen te voegen met behulp van de strcat() methode
strcat() functie: De strcat is een ingebouwde functie van de stringklasse, die twee tekenreeksen toevoegt om een aaneengeschakelde tekenreeks te retourneren.
Syntaxis
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strcat ( char *arr1, char *arr2)
Er zijn twee karakterarrays in de bovenstaande syntaxis, arr1 en arr2, die binnen de functie strcat() worden doorgegeven om een aaneengeschakelde tekenreeks te retourneren.
Laten we een voorbeeld bekijken waarin twee tekenreeksen worden gecombineerd met de functie strcat() in de C++-programmering.
Programma4.cpp
#include #include using namespace std; int main() { // declare and initialize the string char str1[] = ' We love'; char str2[] = ' C++ Programming'; cout << ' String 1: ' <<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let's consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let's consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1> Programma om twee strings samen te voegen met behulp van de append-functie
voeg() functie toe: Een toevoegen() functie is een vooraf gedefinieerde bibliotheekfunctie die wordt gebruikt om een tweede tekenreeks in te voegen of toe te voegen aan het einde van de eerste tekenreeks om een enkele tekenreeks te retourneren.
Syntaxis
str1.append(str2);
In de bovenstaande syntaxis is de str2 een tweede tekenreeks die moet worden doorgegeven in de functie append() die de tekenreeks str2 invoegt aan het einde van de tekenreeks str1.
selecteer uit meerdere tabellen in sql
Laten we een voorbeeld bekijken waarin twee tekenreeksen worden gecombineerd met de append()-functie in de C++-programmering.
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Programma5.cpp
#include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << '
The concatenation of the string is: '<< str1; return 0; } Uitvoer
Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends!
Programma om twee strings samen te voegen met behulp van de overerving van de klasse
Laten we een voorbeeld bekijken waarin twee strings worden gecombineerd met behulp van overerving in de C++-programmering.
Programma6.cpp
#include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &str1, string &str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &str1, string &str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout <>str1; cout <>str2; // create string object derive obj; // print string cout <<\'
the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let's consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'> Programma om twee strings samen te voegen met behulp van de Friend-functie en de strcat()-functie
Laten we een voorbeeld bekijken om twee tekenreeksen te combineren met behulp van de vriendfunctie en de strcat()-functie in de C++-programmering.
Programma7.cpp
#include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout <<\\' 100 enter the first string: \\'; cin.getline (st, 100); take a line of string with limit cout <<\\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \\' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\\'>