蛇行矩阵 （C语言代码）

#include<stdio.h>
int main()
{
    int N,i,j,num[100][100],k,t;
    while(scanf("%d",&N)!=EOF)
    {
        if(N<=100)
        {
           if(N==1) printf("1\n");
           else{
               k=1;
               num[0][0]=1;
               for(i=1;i<N;i++)
               {
                   num[i][0]=num[i-1][0]+k;
                   k++;
               }
               t=2;
               for(i=0;i<N;i++)
               {
                   if(i<N-1)
               {
                   k=t;
                 for(j=1;j<N-i;j++)
                 {
                   num[i][j]=num[i][j-1]+k;
                   k++;
                 }
                 t++;
               }
               }
               for(i=0;i<N;i++)
               for(j=0;j<N-i;j++)
               {
                   if(j<N-1-i)
                   printf("%d ",num[i][j]);
                   else printf("%d\n",num[i][j]);
               }
               }
        }
   }
    return 0;
}