C++ Exercises: Create a new string made of every other character starting with the first from a given string

Last update on April 07 2025 12:56:54 (UTC/GMT +8 hours)

String with Every Other Character

Write a C++ program to create another string made of every other character starting with the first from a given string.

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

// Function to extract characters from the string at even positions
string test(string s)
{
    string result = " "; // Initialize an empty string 'result'

    // Loop through the characters of the input string 's'
    for (int i = 0; i < s.length(); i++)
    {
        // Check if the current index 'i' is even
        if (i % 2 == 0)
            result += s[i]; // Append the character at even positions to 'result'
    }

    return result; // Return the resultant string 'result'
}

// Main function
int main() 
{
    // Output the results of the test function with different input strings
    cout << test("Python") << endl;  // Output: Pto (characters at even positions: P, t, o)
    cout << test("PHP") << endl;  // Output: PP (characters at even positions: P, P)
    cout << test("JS") << endl;  // Output: J (characters at even positions: J)

    return 0; // Return 0 to indicate successful completion
}

Sample Output:

Pto
PP
J

Visual Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to create a new string composed of every other character from the original string, starting with the first.
• Write a C++ program that reads a string and constructs another string by skipping every alternate character.
• Write a C++ program to output a string that contains characters from the even-indexed positions of the input string.
• Write a C++ program that processes a string and prints a new string made of every second character from the original input.

C++ Code Editor:

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