C++ Exercises: Create a new string which is 4 copies of the 2 front characters of a given string

Last update on December 20 2024 12:22:09 (UTC/GMT +8 hours)

4 Copies of First 2 Characters

Write a C++ program to create a string that is 4 copies of the 2 front characters of a given string. If the given string length is less than 2 return the original string.

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

// Function to modify a string based on certain conditions
string test(string str)
{
    // Check if the length of the string is less than 2
    return str.length() < 2 ? str : // If the length is less than 2, return the string as it is
        str.substr(0, 2) + str.substr(0, 2) + str.substr(0, 2) + str.substr(0, 2); // If the length is 2 or more, concatenate the first two characters of the string four times
}

// Main function
int main() 
{
    cout << test("C Sharp") << endl;  // Output the result of test function with string "C Sharp"
    cout << test("JS") << endl;       // Output the result of test function with string "JS"
    cout << test("a") << endl;        // Output the result of test function with string "a"
    return 0;    // Return 0 to indicate successful execution of the program
}

Sample Output:

C C C C
JSJSJSJS
a

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