Find if a String ends With the Given Substring in C++

You are given two strings. The task is to check if the main string ends with another string in C++.

Example

Input:
mainString = "Hello! Geek";
targetString = "Geek"

Output: Hello! Geek ends with Geek.

We can find if the given string ends with the target string using the following method:

Checking if the Main String ends with the Given Substring

We can use the std::string::compare() method of string to compare the substring at the end of the main string with the given target string. If they match, the string::compare() function will return 0, otherwise, it will return the non-zero values.

C++ Program to Check if String Ends with Another String

The below example demonstrates the use of the compare function to find if a string ends with another string or not.

C++

// C++ Program to Check if String Ends with Another String

#include <iostream>
#include <string>
using namespace std;

// Function to check if a string ends with another string
bool endsWith(const string& fullString,
              const string& ending)
{
    // Check if the ending string is longer than the full
    // string
    if (ending.size() > fullString.size())
        return false;

    // Compare the ending of the full string with the target
    // ending
    return fullString.compare(fullString.size()
                                  - ending.size(),
                              ending.size(), ending)
           == 0;
}

int main()
{
    // Sample strings for demonstration
    string str = "Hello! Geek";
    string targetStr = "Geek";

    // Check if the string ends with the target string
    if (endsWith(str, targetStr)) {
        cout << str << " ends with " << targetStr << endl;
    }
    else {
        cout << str << " does not end with " << targetStr
             << endl;
    }

    return 0;
}

Output

Hello! Geek ends with Geek

From C++20 or later we can also use the ends_with function to check if a string ends with another string.