最近看到这样一个关于水果拼盘的另解：
  现有苹果，橘子，香蕉，菠萝，梨5种水果用来做水果拼盘，每个水果拼盘一定有三个水果，且这3个水果的种类不同，问可以制作多少个水果拼盘：
   #include<stdio.h>
void main()
{
    enum fruit {apple,orange,banana,pineapple,pear};   //定义枚举结构
    enum fruit x,y,z,pri;                             //定义枚举变量
    int n=0,loop;
    for(x=apple;x<=pear;x++)
        for(y=apple;y<=pear;x++)
            if(x!=y){
                for(z=apple;z<=pear;z++)
                    if((z!=x)&&(z!=y)){
                        n=n+1;
                        printf("\n%-4d",n);
                        for(loop=1;loop<=3;loop++)
                        {
                            switch(loop){
                            case 1:
                                pri=x;
                                break;
                            case 2:
                                pri=y;
                                break;
                            case 3:
                                pri=z;
                                break;
                            default :break;
                            }
                            switch(pri){
                            case apple:
                                printf("%-9s","apple");
                                break;
                            case orange:
                                printf("%-9s","orange");
                                break;
                            case pineapple:
                                printf("%-9s","pineapple");
                                break;
                            case pear:
                                printf("%-9s","pear");
                                break;
                            default:break;
                            }
                        }
                    }
            }
}
   
复杂了点》但在Vc下运行有错误？该怎么改呢？

    for(x=apple;x<=pear;x++)
        for(y=apple;y<=pear;y++)
            if(x!=y){
                for(z=apple;z<=pear;z++)

#include <stdio.h>

int main(void)
{
    enum frui {apple,orange,banana,pineapple,pear};
    enum frui x,y,z;
    int count = 0;

    for(x = apple;x <= pear;x++)
    {
        for(y = apple;y <= pear;y++)
        {
            for(z = apple;z <= pear;z++)
            {
                if(x != y && y != z && x != z)
                    count++;
            }
        }
    }
    printf("%d",count);

    return 0;
}

在VC下和我出现了一样的问题啊：
\users\lenovo\desktop\新建文件夹\fhjuyt.cpp(9) : error C2676: binary '++' : 'enum main::frui' does not define this operator or a conversion to a type acceptable to the predefined operator
c:\users\lenovo\desktop\新建文件夹\fhjuyt.cpp(11) : error C2676: binary '++' : 'enum main::frui' does not define this operator or a conversion to a type acceptable to the predefined operator
c:\users\lenovo\desktop\新建文件夹\fhjuyt.cpp(13) : error C2676: binary '++' : 'enum main::frui' does not define this operator or a conversion to a type acceptable to the predefined operato

这可能是编译器的问题，VC不支持enum 变量 自加.

我用的是codeblocks ，可以通过