<找工作二> 单个变量象棋老帅问题

#include <iostream> 
struct{
	unsigned char a:4;
	unsigned char b:4;
}i;
int main(){
	
	for (i.a=1;i.a<=9;i.a++)
		for(i.b=1;i.b<=9;i.b++){
			if(i.a%3!=i.b%3){
				printf("A = %d, B = %d\n",i.a,i.b);
			}
		}
getchar();
}