pclab3 4

#include <stdio.h>

int main(void) {
  int n;
  printf("n="); scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n; j++) {
      if (j == 1 || i == j || j == n) {
        printf("*");
      } else {
        printf(" ");
      }
    }
    puts("");
  }
  return 0;
}