程序代码：

#include <stdio.h>
void main()
{
    enum color {red,yellow,blue,white,black};
    enum color i,j,k,y;
    int n=0,x;
    for(i=red;i<=black;i++)
    {
        for(j=red;j<=black;j++)
        {
            for(k=red;k<=black;k++)
            {
                if(i!=j&&i!=k&&j!=k)
                {
                    n++;
                    printf("%d:\t",n);
                    for(x=1;x<=3;x++)
                    {
                        switch(x)
                        {
                        case 1:y=i;break;
                        case 2:y=j;break;
                        case 3:y=k;break;
                        }
                    
                        switch(y)
                        {
                        case red:printf("%5s","red");break;
                        case yellow:printf("%5s","yellow");break;
                        case blue:printf("%5s","blue");break;
                        case white:printf("%5s","white");break;
                        case black:printf("%5s","black");break;
                        }
                    }
                }
                putchar('\n');
            }
        }
    }
    printf("total:%d\n",n);
}