记笔记

问题：口袋中有红、黄、蓝、黑5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种不同颜色的球的可能取法，输出每种排列的情况
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>

enum Color {red,yellow,blue,white,black};
int main(void)
{
        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);
        system("pause");
        return 0;
}