口袋中有红、黄、蓝、白、黑五种颜色的球若干，每次从口袋中取出3个球。求取法

循环遍历即可。if (i != j && j !=k && k!=i) 。

三种不同颜色的条件#include <stdioh>#include <stdlibh>void main(){int i,j,k,n=0;char c[5][7]={"red","yellow","blue","white","black"};for (i=0;i<5;i++)for (j=i+1;j<5;j++)for (k=j+1;k<5;k++){ if (i != j && j !=k && k!=i) printf("%s %s %s\n",c[i],c[j],c[k]); n++;}。

printf("n=%d",n);}得：red yellow bluered yellow whitered yellow blackred blue whitered blue blackred white blackyellow blue whiteyellow blue blackyellow white blackblue white blackn=10