C++ Exercises: Check whether the first two characters and last two characters of a given string are same

Last update on August 13 2025 12:46:53 (UTC/GMT +8 hours)

First Two = Last Two Characters Check

Write a C++ program to check whether the first two characters and the last two characters of a given string are the same.

Sample Solution:

C++ Code :

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

// Function that checks if the first two characters are equal to the last two characters of the input string
bool test(string s1) 
{
    return s1.substr(0, 2) == s1.substr(s1.length() - 2); // Return true if the first two characters are equal to the last two characters of s1
}

// Main function
int main() 
{
    cout << test("abab") << endl;       // Output for "abab"
    cout << test("abcdef") << endl;    // Output for "abcdef"
    cout << test("xyzsderxy") << endl; // Output for "xyzsderxy"
    return 0;    // Return statement indicating successful termination of the program
}

Sample Output:

1
0
1

Visual Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to check if the first two characters of a string match its last two characters and output a boolean value accordingly.
• Write a C++ program that reads a string and returns true if the starting two letters are identical to the ending two letters, otherwise false.
• Write a C++ program to compare the first and last two characters of an input string and print 1 for a match or 0 otherwise.
• Write a C++ program that examines a string for equal leading and trailing pairs and outputs the result as a boolean value.

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