C++ Program to Concatenate Two Strings

In the following example of C++ program to concatenate (join) two strings (both string objects and C-style strings).

You can concatenate two string objects in C++ using + operator.

Concatenate String Objects :

Program :

#include 
using namespace std;

int main()
{
    string s1, s2, result;

    cout << "Enter string s1: ";
    getline (cin, s1);

    cout << "Enter string s2: ";
    getline (cin, s2);

    result = s1 + s2;

    cout << "Resultant String = "<< result;

    return 0;
}

Output :

Enter string s1: C++
Enter string s2: Programs
Resultant String = C++Programs

You can concatenate two C-style strings in C++ using strcat() function.

Concatenate C-style Strings :

Program :

#include 
#include 
using namespace std;

int main()
{
    char s1[50], s2[50];

    cout << "Enter string s1: ";
    cin.getline(s1, 50);

    cout << "Enter string s2: ";
    cin.getline(s2, 50);

    strcat(s1, s2); 

    cout << "s1 = " << s1 << endl;
    cout << "s2 = " << s2;

    return 0;
}

Output :

Enter string s1: Welcome To 
Enter string s2: Free Time Learning
s1 = Welcome To Free Time Learning
s2 = Free Time Learning