How to check if Two Arrays are Equal in C++ - Step by Step Examples

How to check if Two Arrays are Equal in C++ ?

Answer

To check if two arrays are equal in C++, you can use the std::equal algorithm for arrays with the same elements and manually compare elements for arrays with different elements.

✐ Examples

1 Arrays with Same Elements

In this example,

We create two arrays named arr1 and arr2 with the same elements.
We then use the std::equal algorithm to check if the arrays are equal and store the result in the variable equal1.
The std::equal algorithm compares the elements of two sequences and returns true if they are equal; otherwise, false.
Finally, we print the value of equal1 to the console.

C++ Program

#include <iostream>
#include <algorithm>
#include <array>
int main() {
    std::array<int, 3> arr1 = {1, 2, 3};
    std::array<int, 3> arr2 = {1, 2, 3};
    bool equal1 = std::equal(arr1.begin(), arr1.end(), arr2.begin());
    std::cout << "Arrays are equal: " << std::boolalpha << equal1 << std::endl;
    return 0;
}

Output

Arrays are equal: true

2 Arrays with Different Elements

In this example,

We create two arrays named arr3 and arr4 with different elements.
We then manually compare each element of both arrays and store the result in the variable equal2.
If all elements are equal, equal2 is set to true; otherwise, it's set to false.
Finally, we print the value of equal2 to the console.

C++ Program

#include <iostream>
#include <array>
int main() {
    std::array<int, 3> arr3 = {1, 2, 3};
    std::array<int, 3> arr4 = {3, 2, 1};
    bool equal2 = true;
    for (int i = 0; i < arr3.size(); i++) {
        if (arr3[i] != arr4[i]) {
            equal2 = false;
            break;
        }
    }
    std::cout << "Arrays are equal: " << std::boolalpha << equal2 << std::endl;
    return 0;
}

Output

Arrays are equal: false

Summary

In this tutorial, we learned How to check if Two Arrays are Equal in C++ language with well detailed examples.

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How to check if Two Arrays are Equal in C++ - Step by Step Examples

How to check if Two Arrays are Equal in C++ ?

Answer

✐ Examples

1 Arrays with Same Elements

C++ Program

Output

2 Arrays with Different Elements

C++ Program

Output

Summary

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