Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
   // get length 
   int length=0;
   while (str[length] != '\0')
   {
    length ++;
   }

   for (int i=0 ; i < length / 2 ; i ++)
   {
    int start = str[i];
    int end = str[length - 1 -i];

    str[i] = end;
    str[length - 1 -i] = 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;
}

Solving Approach