C++ Exercises: Concat two given strings

Last update on December 20 2024 12:28:32 (UTC/GMT +8 hours)

Add Strings After Trimming Longer String

Write a C++ program to add two given strings. If the given strings have different lengths, remove the characters from the longer string.

Sample Solution:

C++ Code :

#include <iostream> // Including the input/output stream library
using namespace std; // Using the standard namespace

// Function that concatenates two strings based on their lengths
string test(string s1, string s2)
{
    // Check if the length of s1 is less than the length of s2
    if (s1.length() < s2.length())
    {
        // Concatenate s1 with a substring of s2 from (s2.length() - s1.length()) to the end of s2
        return s1 + s2.substr(s2.length() - s1.length());
    }
    // Check if the length of s1 is greater than the length of s2
    else if (s1.length() > s2.length())
    {
        // Concatenate a substring of s1 from (s1.length() - s2.length()) to the end of s1 with s2
        return s1.substr(s1.length() - s2.length()) + s2;
    }
    else
    {
        // Concatenate s1 and s2 if their lengths are equal
        return s1 + s2;
    }
}

// Main function
int main() 
{
    cout << test("abc", "abcd") << endl;    // Output for "abc" and "abcd"
    cout << test("Python", "Python") << endl; // Output for "Python" and "Python"
    cout << test("JS", "Python") << endl;    // Output for "JS" and "Python"
    return 0;    // Return statement indicating successful termination of the program
}

Sample Output:

abcbcd
PythonPython
JSon

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