java编程题目,急啊..请高手帮忙

Question

一副扑克(除开大,小王),从小到大分别是1(A),2,3,4,5,6,7,8,910,J(11),Q(12),K(13).从中任意抽出4张牌, 运用+、-、*、/使四个数字组成一个表达式，使其值为24.
请大家帮忙把具体编程写出来..谢谢

Answer 1

int wanna=24;
//hf 红方
//ht 红桃
//hm 黑桃
//mh 梅花
//循环不就好啦
String[] shf={"","A","2","3","4","5","6","7","8","9","10","J","Q","K"};
for(int hf=1;hf<=13 ;hf++){
for(int ht=1;ht<=13;ht++){
for(int hm=1;hm<=13;hm++){
for(int mh=1;mh<=13;mh++){
if(mh+hm+ht+hf==wanna){
System.out.println("梅花"+shf[mh]+"+黑桃"+shf[hm]+"+红桃"+shf[ht]+"+红方"+shf[hf]+"=24");
continue;
}
}
}
}
}

Answer 2

不会

Answer 3

用穷举法了 计算机很快的