新建一条铁路线，有15个站，在任何车站都能上下车，编写程序列出所有的车票种类，算出车票种数。站名用数字编号1-15表示。
这题我会，
代码如下：
#include<stdio.h>
int main()
{
const char * const stateName[] = {"1站","2站","3站","4站","5站","6站","7站","8站",
"9站","10站","11站","12站","13站","14站","15站"};
int i,j,count=0;
for(i=0;i<15;i++)
for(j=0;j<15;j++)
if(i!=j)
{
count++;
printf("票类 %3d从%s到%s\n",count,stateName[i],stateName[j]);
}
printf("共 %3d 种票\n",count);}