Reverse a String In-Place

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

void reverse_string(char *str) {
    // Your logic here
    int count = 0, a = 0;
    char temp;
    count = strlen(str) - 1;
    int b = count;
    while(a < b)
    {
        temp = str[a];
        str[a] = str[b];
        str[b] = temp;
        a++;
        b--;
    }
}

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;
}