計算機の事例
2093 ワード
Insert title here
function cal(e) {
var obj = e.target || e.srcElement;
if(obj.nodeName != "INPUT") {
return;
}
var value = obj.value;
var screen = document.getElementById("screen");
if(value=="C") {
screen.innerHTML = "";
} else if (value=="=") {
var exp = screen.innerHTML;
try {
var r = eval("("+exp+")");
screen.innerHTML = r;
} catch(e) {
console.log(e);
screen.innerHTML = "Error";
}
} else {
screen.innerHTML += value;
}
}