2.打印图案

#include<stdio.h>
void show1(int n) {
  int num = 1;
  for (int i = 1; i <= n; i++) {
    for (int k = 1; k <= i; k++, num++) {//k为输出数字次数 
      printf("%3d", num);
    }
    for (int j = 1; j <= n - i; j++) {//j为输出空格次数 
      printf("   ");
    }
    printf("\n");
  }
  printf("\n");
}
void show2(int n) {
  int num = 1;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n - i; j++) {//j为输出空格次数 
      printf("   ");
    }
    for (int k = 1; k <= i; k++, num++) {//k为输出数字次数 
      printf("%3d", num);
    }
    printf("\n");
  }
  printf("\n");
}
void show3(int n) {
  int num = 1;
  for (int i = 1; i <= n; i++) {
    for (int k = 1; k <= n - i + 1; k++, num++) {//k为输出数字次数 
      printf("%3d", num);
    }
    for (int j = 1; j <= n - (n - i) - 1; j++) {//j为输出空格次数 
      printf("   ");
    }
    printf("\n");
  }
  printf("\n");
}
void show4(int n) {
  int num = 1;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= n - (n - i) - 1; j++) {//j为输出空格次数 
      printf("   ");
    }
    for (int k = 1; k <= n - i + 1; k++, num++) {//k为输出数字次数 
      printf("%3d", num);
    }
    printf("\n");
  }
  printf("\n");
}
int main() {
  int n;
  while (~scanf("%d", &n)) {
    show1(n);
    show2(n);
    show3(n);
    show4(n);
  }
}