这玩意能用if循环写吗
function count() {
var ipt1 = document.getElementById('ipt1').value; //获取第一个输入框的值
var ipt2 = document.getElementById('ipt2').value;//获取第二个输入框的值
var select1 = document.getElementById('select1').value;//获取选择框的值
var fruit = document.getElementById('fruit').value;
//获取通过下拉框来选择的值来改变加减乘除的运算法则
if (select1 == '+') {
fruit = ipt1 + ipt2;
return fruit;
}
else if (select1 == '-') {
fruit = ipt1 - ipt2;
return fruit;
}
else if (select1 == '*') {
fruit = ipt1 * ipt2;
return fruit;
}
else (select1 == '/')
{
fruit = ipt1 / ipt2;
return fruit;
}
}我写了个，控制台没报错，运行也无果
