C语言经典算法之 - 巴斯卡三角形

#include <stdio.h>
#define N 12
long combi(int n,int r)
{
  int i;
  long p = 1;
  for (i = 1; i <= r; i++)
    p = p *(n - i + 1) / i;
  return p;
}
 
void paint()
{
  int n,r,t;
  for (n = 0; n <= N; n++)
  {
    for (r = 0; r <= n; r++)
    {
      int i; /* 排版设定开始*/
      if (r == 0)
      {
        for (i = 0; i <= (N - n); i++)
          printf(" ");
      }
      else
      {
        printf(" ");
      } /* 排版设定结束*/
      printf("%3d",combi(n,r));
    }
    printf("n");
  }
}