93. Reverse a String In-Place

#include <stdio.h>

void reverse_string(char *str) {
    // Your logic here
    int sum = 0 ;
    for(int i = 0 ; *(str+i) != '\0' ; i++){
        sum++ ;
    }
    int i = 0 ;
    while(i < (sum-1)){
        char temp = *(str+i) ;
        *(str+i) = *(str+(sum-1)) ;
        *(str+(sum-1)) = temp ;
        sum -- ;
        i++ ;
    }
}

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;
}