Java实现无界面计算器

## 要求
### 1.四个方法加减乘除
### 1.循环加switch
### 1.传递2个数
源码如下：

```

public class Jisuanqi {
    public static void main(String[] args) {
        System.out.println("请输入运算次数");
        Scanner x=new Scanner(System.in);
        int n=x.nextInt();
for(int i=1;i<=n;i++){
    System.out.println("请输入需要运算的两个数");
    Scanner num=new Scanner(System.in);
    int a=num.nextInt();
    Scanner num2=new Scanner(System.in);
    int b=num2.nextInt();
    System.out.println("请输入运算符号");
    Scanner zf=new Scanner(System.in);
    char c=zf.next().charAt(0);

    switch(c){
        case '+':
            System.out.println(sum(a,b));
            break;
        case '-':
            System.out.println(cha(a,b));
            break;
        case '*':
            System.out.println(cheng(a,b));
            break;
        case '/':
            System.out.println(chu(a,b));
            break;
    }
    System.out.println("本次运算结束");
}
    }
    public static int sum(int x, int y){
        return x+y;
    }
    public static int cha(int x, int y){
        return x-y;
    }
    public static int cheng(int x, int y){
        return x*y;
    }
    public static int chu(int x, int y){
        return x/y;
    }
}