#include<stdio.h>
int main()
{
  int n, i, j;
  while(scanf("%d", &n) == 1)
  {
       if(!n)
       continue;
     int a[30][30];
     for(i = 0;i < n;i++)
     {
        for(j = 1, a[i][0] = 1, a[i][i] = 1 ;j < i;j++)
        {
           a[i][j] = a[i - 1][j] + a[i - 1][j - 1];
         }
      }
      for(i = 0; i < n;i++)
      {
         for(j = 0;j <= i;j++)     
         {
            if(j == 0)
            printf("%d", a[i][j]);
            else
            printf(" %d", a[i][j]);
          }
          printf("\n");
       }
       printf("\n");
   }
   return 0;
}

回复2楼3楼:抱歉啊，是说杭电的在线提交提示compilation error

谢谢啦，我知道为什么不能通过了，因为原来题目要求输入数范围为1<=n<=30,以下红色为改动的地方
#include<stdio.h>
int main()
{
  int n, i, j;
  while(scanf("%d", &n) == 1)
  {
      /* if(!n)
       continue;*/
    if(n>=1&&n<=30)
    {
     int a[30][30];
     for(i = 0;i < n;i++)
     {
        for(j = 1, a[i][0] = 1, a[i][i] = 1 ;j < i;j++)
        {
           a[i][j] = a[i - 1][j] + a[i - 1][j - 1];
         }
      }
      for(i = 0; i < n;i++)
      {
         for(j = 0;j <= i;j++)     
         {
            if(j == 0)
            printf("%d", a[i][j]);
            else
            printf(" %d", a[i][j]);
          }
          printf("\n");
       }
       printf("\n");
      }
   }
   return 0;
}