javascript - 联系人保存结果未在 Javascript 中显示

Question

我用 JavaScript 编写了一个电话号码保存程序。一切正常，但是当我在搜索框中搜索名称或号码时，没有显示结果:

function contact() {
    var nam1=prompt("Please enter the name");
    var num1=prompt("please enter the phone number");
}

contact();

function search() {
    var searc= prompt("Please enter the name of your contact or phone number");
}

search();

//search box

if ( searc == nam1 ) {
    alert("The phone Number is , " + num1);
}

if ( searc == num1 ) {
    alert("The Contact Name is , " + nam1);
}

Answer 1

试试这个:

var nam1='';
var num1='';
var searc='';

function contact() {
    nam1=prompt("Please enter the name");
    num1=prompt("please enter the phone number");
}
contact();
function search() {
    searc= prompt("Please enter the name of your contact or phone number");
}
search();
//search box
if ( searc == nam1 ) {
    alert("The phone Number is , " + num1);
}
if ( searc == num1 ) {
    alert("The Contact Name is , " + nam1);
}

注意:您应该全局定义这些变量，以便在您需要时可以使用它们使用。