Reverse a String In-Place

#include <stdio.h>
int my_strlen(char *str)
{
    int cnt = 0;
    while(*str)
    {
        cnt++;
        str++;
    }
    return cnt;
}
void reverse_string(char *str) {
    // Your logic here
    int r = 0,l = my_strlen(str)-1;

    while(r<l)
    {
        char temp = str[r];
        str[r]=str[l];
        str[l] = temp;
        r++;
        l--;
    }
    
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    int i = 0;
    while (str[i] != '\0') {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    reverse_string(str);
    printf("%s", str);
    return 0;
}