Untitled

#include <stdio.h>
int hollowsquare(int);

int main(){
    int n;
    printf("Enter the length of the square in units ");
    scanf("%d", &n);
    hollowsquare(n);
    return 0;
}

int hollowsquare(int n){
    for (int i = 0; i < n; i++){
        for (int j = 0; j < n; j++){
            if (i == 0 || i == 3 || j == 0 || j == 3){
                printf("%c ", 'A');
            }
            else{
                printf(" ");
            }
            
        }
        printf("\n");
    }

    return 0;

}