C strcmp() Guide: Compare Strings

The strcmp function is used to compare the size of two strings, and its prototype is:

int strcmp(const char *str1, const char *str2);

“其中，str1 and str2 are the two strings being compared.”

There are three possible return values for the strcmp function.

1. Return 0 if str1 is equal to str2.
2. If str1 is greater than str2, return a positive number.
3. If str1 is less than str2, return a negative number.

Here is an example code using the strcmp function:

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

int main() {
    char str1[] = "hello";
    char str2[] = "world";

    int result = strcmp(str1, str2);

    if (result == 0) {
        printf("str1 and str2 are equal\n");
    } else if (result > 0) {
        printf("str1 is greater than str2\n");
    } else {
        printf("str1 is less than str2\n");
    }

    return 0;
}

In this code snippet, we compared the sizes of two strings “hello” and “world” and printed the corresponding information based on the comparison result.