Reverse a String In-Place

Code

#include <stdio.h>

void reverse_string(char *str) {
    int count = 0;
    for(int i=0;*(str+i)!='\0';i++){
        count++;
    }
    int n = count;
    count--;
    for(int i=0;i<n/2;i++){
        char ch;
        ch = *(str + i);
        *(str + i) = *(str + count);
        *(str + count) = ch;
        count--;
    }
}

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