java简单运算

class Count{
    public int getSum(int a ,int b){
        // a=3 b=4 a+b=7
        // a=8 b=-5 a+b=3
        return a+b;
    }

    public int getSub(int x,int y ){
        // x =8 y = 5
        // return a-b
        //方法内调用其他方法 getsum（x，-y）=3
        return getSum(x,-y);
    }
}

public class ClassSum {
    public static void main(String[] args) {
        Count c = new Count();
        c.getSum(3,4);
        System.out.println(c.getSum(3,4));
        int res = c.getSub(8,5);
        System.out.println("8-5的结果是："+res);
    }
}