程序代码：

 #include<stdio.h>

 #include<stdlib.h>

 int Binomial(int n,int k)

 {
     int i,j;
     int **C=(int**)malloc(sizeof(int*)*(n+1));
     for(i=0;i<n+1;++i)  C[i]=(int*)malloc(sizeof(int)*(k+1));
     for(i=0;i<=n;++i)
       for(j=0;j<=(k>i?i:k);++j)
          if(j==0||j==k) C[i][j]=1;
          else  C[i][j]=C[i-1][j]+C[i-1][j-1];
    int ret = C[n][k];
    for(i=0;i<n+1;++i) free(C[i]);  free(C);
   return ret;

 }

 int main(void)

 {
      int n,k;
      while(scanf("%d,%d",&n,&k)!=EOF)
        printf("%d\n",Binomial(n,k));
    return 0;

 }