口袋中有红、黄、蓝、黑四种颜色的球若干个。每次从口袋中先后取出3个球，问得到3种不同色的球的可能取法，打印出每种排列的情况。
请问各位大侠，此程序怎么无法编译？#include<stdio.h>
void main()
{
enum color {red,yellow,blue,white,black};
enum color i,j,k,pri;
int n,loop;
n=0;
for (i=red;i<=black;i++)
for(j=red;j<=black;j++)
if(i!=j)
{
for(k=red;k<=black;k++)
if((k!=i)&&(k!=j))
{
n=n+1;
printf("%-4d",n);
for(loop=1;loop<=3;loop++)
{
switch(loop)
{
case 1:pri=i;break;
case 2:pri=j;break;
case 3:pri=k;break;
default:break;
}
switch(pri)
{
case red:printf("%-10s","red");break;
case yellow:printf("%-10s","yellow");break;
case blue:printf("%-10s","blue");break;
case white:printf("%-10s","white");break;
case black:printf("%-10s","black");break;
default:break;
}
}
printf("\n");
}
}
printf("\ntotal:%5d\n",n);
}
