求教

# include <stdio.h>
void main()
{
    enum color {red, yellow, biue, 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)
                            {
case1: pri=i;
       break;
case2: pri=j;
       break;
case3: 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 ("\n total:%5d\n", n);
}