杨辉三角 （C语言代码）

#include <stdio.h>
int main()
{
     int a,i,j;
     int b[30][30];
 
     while(scanf("%d",&a)!=EOF)
     { 
               b[0][0]=1;b[1][0]=1;b[1][1]=1;
    
               printf("%d\n",b[0][0]);
               if(a==1){printf("\n");continue;}
    
               printf("%d %d\n",b[1][0],b[1][1]);
               if(a==2){printf("\n");continue;}

               for(i=2;i<a;i++)
               {
                    for(j=0;j<=i;j++)
                    {
                         if(j==0||j==i)
                         {
                            b[i][j]=1;
                            if(j==i)printf("%d\n",b[i][j]);
                            else printf("%d ",b[i][j]);
                          }
                          else 
                          {
                                 b[i][j]=b[i-1][j-1]+b[i-1][j];
                                 if(j<i)printf("%d ",b[i][j]);
                                 else printf("%d\n",b[i][j]);
                           }
                     }
               }

               printf("\n");
      }

      return 0;
}

解题思路:





注意事项:





参考代码: