cala/main.js

计算机

const jia =require("./lib/jia")
const jian =require("./lib/jian")
const cheng =require("./lib/cheng")
const chu =require("./lib/chu")
module.exports =function(a,flag,b){
    switch (flag) {
        case "+":
            return jia(a,b)
            break;
        case "-":
            return jian(a,b)
            break;
        case "*":
            return cheng(a,b)
            break;
        case "/":
            return chu(a,b)
            break;
    }
}