c - 简单的 C 程序错误

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已关闭。这个问题是 not reproducible or was caused by typos 。目前不接受答案。

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这个问题是由拼写错误或无法再重现的问题引起的。虽然类似的问题可能是 on-topic在这里，这个问题的解决方式不太可能帮助 future 的读者。

已关闭 6 年前。

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我正在编写一个非常简单的程序来显示类的模拟天气数据，但我不明白为什么 Visual Studio 总是给我一个错误

错误在于温度，它告诉我:错误 C2440: '=' : 无法从 'double (__cdecl *)(void)' 转换为 'double'

我迷路了，请帮忙

void DisplayWeatherData(void)
{
    double temperature,humidity,pressure,windspeed,direction,bt,bp,bw;

    temperature = GetTemperature;
    humidity = GetHumidity;
    pressure = GetPressure;
    windspeed = GetWindspeed;
    direction = GetWindDirection;
    bt = (temperature * 9.0 / 5.0) + 32.0;
    bp = pressure * KPATOINHG;
    bw = windspeed * KMTOMPH;


    printf("\nTemperature: %4.1lf C\tHumidity: %3.0lf%%\tPressure: %4.1lf kPa\n",temperature,humidity,pressure);
    printf("Windspeed: %3.0lf km/hr\tDirection: %3.0lf Degrees\n\n",windspeed,direction);

    printf("\nTemperature: %4.1lf F\tHumidity: %3.0lf%%\tPressure: %4.1lf inHg\n",bt,humidity,bp);
    printf("Windspeed: %3.0lf mph\tDirection: %3.0lf Degrees\n\n",bw,direction);


}

double GetTemperature(void)
{
return 25.1;
}
double GetHumidity(void)
{
return 55.4;
}   
double GetPressure(void)
{
return 101.7;
}   
double GetWindspeed(void)
{
return 15.5;
}   
double GetWindDirection(void)
{
return 320.0;
}

Answer 1

您错过了括号:

temperature = GetTemperatur;
humidity = GetHumidity;
pressure = GetPressure;
windspeed = GetWindspeed;
direction = GetWindDirection;

应该是这样的:

temperature = GetTemperature();
.//same
.//same
.//same
direction = GetWindDirection();