C program to compare the two strings

To compare two strings in C, you can use the strcmp function from the standard library. The strcmp function compares two strings character by character and returns an integer value indicating their relationship. Here’s a C program to compare two strings:

#include <stdio.h>
#include <string.h>

int main() {
    char str1[100], str2[100];

    printf("Enter the first string: ");
    scanf("%s", str1);

    printf("Enter the second string: ");
    scanf("%s", str2);

    // Compare the two strings using strcmp
    int result = strcmp(str1, str2);

    if (result == 0) {
        printf("The two strings are equal.\n");
    } else if (result < 0) {
        printf("The first string is lexicographically less than the second string.\n");
    } else {
        printf("The first string is lexicographically greater than the second string.\n");
    }

    return 0;
}

In this program:

1. We declare two character arrays str1 and str2 to store the input strings.
2. We use printf and scanf to input both strings from the user.
3. We compare the two strings using strcmp. The strcmp function returns 0 if the strings are equal, a negative value if the first string is lexicographically less than the second, and a positive value if the first string is lexicographically greater than the second.
4. We check the result of strcmp and print an appropriate message to indicate the relationship between the two strings.

Compile and run the program, and it will compare the two input strings and display the result of the comparison.