93. Reverse a String In-Place

#include <stdio.h>

int str_length(char* str)
{
    int cnt =0;
    while(*(str++))
    {
        cnt++;
    }
    return cnt;
}
void reverse_string(char *str) {
    // Your logic here
    int start = 0;
    int end = str_length(str) -1;
    while(start < end)
    {
        char tmp  = str[start];
        str[start] = str[end];
        str[end] = tmp;
        end--;
        start++;
    }
}

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;
}