Reverse a String In-Place

Code

#include <stdio.h>

void swap(char *a,char *b){
    char temp;
    temp=*a;
    *a=*b;
    *b=temp;
}

void reverse_string(char *str) {
    // Your logic here
    int len=0;
    while(str[len]!='\0'){
        len++;
    }
    for(int i=0;i<(len/2);i++){
        swap(str+i,str+len-1-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;
}

Solving Approach : count the number of characters in string , then run a loop till mid and swap their character at first and last  positions