Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
    
    int s=0, e = n-1;

    while(s<=e){
        int temp = arr[s];
        arr[s++]=arr[e];
        arr[e--]= temp;
    }

        // for(int i = 0; i < n/2; i++)
        // int tmp = arr[i];
        // arr[i] = arr[n-i-1];
        // arr[n-i-1] = tmp;
    
}

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
        	printf(" ");
        }
    }
    return 0;
}

Solving Approach