How can you reverse a string in the C programming language?

There are multiple methods to achieve string reversal in the C language, and here is one common method:

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

void reverseString(char* str) {
    int len = strlen(str);
    for (int i = 0; i < len / 2; i++) {
        char temp = str[i];
        str[i] = str[len - i - 1];
        str[len - i - 1] = temp;
    }
}

int main() {
    char str[] = "hello world";
    printf("Original string: %s\n", str);
    
    reverseString(str);
    
    printf("Reversed string: %s\n", str);
    
    return 0;
}

In the above code, we first define a function called reverseString, which takes a pointer to a string as a parameter and reverses the string. The function first calculates the length of the string, then uses a loop to swap the first half and second half of the string. Finally, in the main function, we define a string array and reverse the strings by calling the reverseString function, and output the result.