pclab4 1

#include <stdio.h>

void drawFullLine(int n) {
  for (int i = 1; i <= n; i++) {
    printf("*");
  }
  printf("\n");
}

void drawEmptyLine(int n) {
  printf("*");
  for (int i = 2; i < n; i++) {
    printf(" ");
  }
  printf("*\n");
}

void drawEmptySection(int n) {
  for (int i = 2; i <= n; i++) {
    drawEmptyLine(n * 2 + 1);
  }
}

int main(void) {
  int n;
  printf("n="); scanf("%d", &n);
  drawFullLine(n);
  drawEmptySection(n / 2);
  drawFullLine(n);
  drawEmptySection(n / 2);
  drawFullLine(n);
  return 0;
}