《C++编程》第3章第30题

杨辉三角

#include<stdio.h>  unsigned long kolen(unsigned long x,unsigned long y)  {   unsigned long z;       if((y==1)||(y==x))    return 1; else z=kolen(x-1,y-1)+kolen(x-1,y);   return z;   }   int main()  {   unsigned long a,b;   while(1)   {    printf("请输入两个数作为杨辉三角的行和列\n");    scanf("%u%u",&a,&b);    printf("第%u行第%u列的数为%u\n",a,b,kolen(a,b));   }   return 0;  }  

运行结果如下：