JavaScript 演练(4). 回调函数

function func(callback, a, b, c) {    return callback(a, b, c);}function funAdd(a, b, c) {    function callback(a, b, c) { return a + b + c; }    return func(callback, a, b, c);}function funMul(a, b, c) {    function callback(a, b, c) { return a * b * c; }    return func(callback, a, b, c);}var x = 2, y = 3, z = 4;alert(funAdd(x, y, z)); //9alert(funMul(x, y, z)); //24

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JavaScript 演练(4). 回调函数

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