How to Compare Two Strings in C++ - Step by Step Examples

How to Compare Two Strings in C++ ?

Answer

In C++, you can use the == operator or the strcmp() function from the cstring library to compare two strings for equality.

✐ Examples

1 Comparison of Strings in C++ using ==

In this example,

We create two string objects named str1 and str2 with different values.
We compare the strings using the == operator.
The == operator returns true if the strings are equal, and false otherwise.
Finally, we print the result of the comparison.

C++ Program

// Comparison of Strings in C++ using ==
#include <iostream>
#include <string>
int main() {
    std::string str1 = "Hello";
    std::string str2 = "hello";
    bool result = str1 == str2;
    std::cout << "Strings are equal: " << std::boolalpha << result << std::endl;
    return 0;
}

Output

Strings are equal: false

2 Comparison of Strings in C++ using strcmp()

In this example,

We include the cstring header file for using the strcmp() function.
We create two character arrays named str1 and str2 with different values.
We compare the strings using the strcmp() function, which returns 0 if the strings are equal, a negative value if str1 is less than str2, and a positive value otherwise.
Finally, we print the result of the comparison.

C++ Program

// Comparison of Strings in C++ using strcmp()
#include <iostream>
#include <cstring>
int main() {
    char str1[] = "Hello";
    char str2[] = "hello";
    int result = std::strcmp(str1, str2);
    if (result == 0) {
        std::cout << "Strings are equal" << std::endl;
    } else {
        std::cout << "Strings are not equal" << std::endl;
    }
    return 0;
}

Output

Strings are not equal

Summary

In this tutorial, we learned How to Compare Two Strings in C++ language with well detailed examples.

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How to Compare Two Strings in C++ - Step by Step Examples

How to Compare Two Strings in C++ ?

Answer

✐ Examples

1 Comparison of Strings in C++ using ==

C++ Program

Output

2 Comparison of Strings in C++ using strcmp()

C++ Program

Output

Summary

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