how to check char array equality in c++

To check the equality of two char arrays in C++, you can use the strcmp() function from the <cstring> library. Here are the steps to do so:

1. Include the <cstring> library at the beginning of your code:

#include <cstring>

1. Declare two char arrays that you want to compare:

char array1[] = "Hello";
char array2[] = "World";

1. Use the strcmp() function to compare the two arrays:

int result = strcmp(array1, array2);

1. Check the value of result to determine the equality of the arrays. The strcmp() function returns:
2. 0 if the arrays are equal
3. a negative value if array1 is lexicographically less than array2
4. a positive value if array1 is lexicographically greater than array2

Here is an example that demonstrates these steps:

#include <iostream>
#include <cstring>

int main() {
    char array1[] = "Hello";
    char array2[] = "World";

    int result = strcmp(array1, array2);

    if (result == 0) {
        std::cout << "The arrays are equal." << std::endl;
    } else if (result < 0) {
        std::cout << "array1 is less than array2." << std::endl;
    } else {
        std::cout << "array1 is greater than array2." << std::endl;
    }

    return 0;
}

The output of this example will be "array1 is less than array2." because the ASCII value of 'H' (first character of array1) is less than the ASCII value of 'W' (first character of array2).

I hope this explanation helps! Let me know if you have any further questions.