javascript - 控制台日志中函数未定义？

Question

我正在尝试创建一个工具来转换摄氏温度、华氏温度或开尔文温度值，但控制台显示函数 getTemperature() 未定义？

function getTemperature() {
    var fahrenheit = document.formBox.tempF.value;
    var celsius = document.formBox.tempC.value;
    var kelvin = document.formBox.tempK.value;
    var select = document.formBox.select.value;

    //User gives initial temperature in fahrenheit, convert to C and K
    if (select === "GivenF") {
        var c = (5/9)*(fahrenheit-32);
        var k = ((((fahrenheit-32)*5)/9) + 273.15);
        document.getElementById("celsius").innerHTML = "This equals " + c " degrees celsius.";
        document.getElementById("kelvin").innerHTML = "This equals " + k " kelvin.";
        document.getElementById("fahrenheit").innerHTML = "";
    }
    //User gives initial temperature in celsius, convert to F and K
    else if (select === "GivenC") {
        var f = ((9/5)*celsius)+32;
        var k = celsius+273.15;
        document.getElementById("celsius").innerHTML = "";
        document.getElementById("kelvin").innerHTML = "This equals " + k " kelvin.";
        document.getElementById("fahrenheit").innerHTML = "This equals " + f " fahrenheit.";
    }
    //Use gives initial temperature in kelvin, convert to F and C
    else if (select === "GivenK") {
        var f = (9/5)*(kelvin-273)+32;
        var c = kelvin-273.15;
        document.getElementById("celsius").innerHTML = "This equals " + c " degrees celsius.";
        document.getElementById("kelvin").innerHTML = "";
        document.getElementById("fahrenheit").innerHTML = "This equals " + f " fahrenheit.";
    };
}

Answer 1

存在语法错误，例如

 ... = "This equals " + c " degrees celsius.";

变量后面缺少+符号的地方。

这也可能与您调用函数的方式有关，但首先是语法错误。