请给出 以下压力单位 相互转换的代码 以Qt为例 0:kPa 1:kgf 2:bar 3:psi 4:inHg 5:mmHg 6:MPA
时间: 2023-07-29 18:05:49 浏览: 236
以下是一个简单的Qt代码示例,用于将给定的压力值从一个单位转换为另一个单位:
```cpp
// 定义压力单位枚举类型
enum PressureUnit {
kPa,
kgf,
bar,
psi,
inHg,
mmHg,
MPA
};
// 定义一个函数来进行单位转换
double convertPressure(double value, PressureUnit fromUnit, PressureUnit toUnit) {
switch(fromUnit) {
case kPa:
switch(toUnit) {
case kPa: return value;
case kgf: return value * 0.10197162;
case bar: return value * 0.01;
case psi: return value * 0.14503774;
case inHg: return value * 0.2952998751;
case mmHg: return value * 7.500615613;
case MPA: return value * 0.001;
}
break;
case kgf:
switch(toUnit) {
case kPa: return value * 9.80665;
case kgf: return value;
case bar: return value * 0.980665;
case psi: return value * 14.22334331;
case inHg: return value * 28.95902872;
case mmHg: return value * 735.5592401;
case MPA: return value * 0.00980665;
}
break;
case bar:
switch(toUnit) {
case kPa: return value * 100;
case kgf: return value * 1.0197162;
case bar: return value;
case psi: return value * 14.5037738;
case inHg: return value * 29.52998751;
case mmHg: return value * 750.0615613;
case MPA: return value * 0.1;
}
break;
case psi:
switch(toUnit) {
case kPa: return value * 6.894757;
case kgf: return value * 0.07030696;
case bar: return value * 0.06894757;
case psi: return value;
case inHg: return value * 2.03625437;
case mmHg: return value * 51.7149314;
case MPA: return value * 0.006894757;
}
break;
case inHg:
switch(toUnit) {
case kPa: return value * 3.386389;
case kgf: return value * 0.03453103;
case bar: return value * 0.03386389;
case psi: return value * 0.49115408;
case inHg: return value;
case mmHg: return value * 25.39999998;
case MPA: return value * 0.003386389;
}
break;
case mmHg:
switch(toUnit) {
case kPa: return value * 0.133322;
case kgf: return value * 0.00135951;
case bar: return value * 0.00133322;
case psi: return value * 0.01933677;
case inHg: return value * 0.03937008;
case mmHg: return value;
case MPA: return value * 0.000133322;
}
break;
case MPA:
switch(toUnit) {
case kPa: return value * 1000;
case kgf: return value * 101.97162;
case bar: return value * 10;
case psi: return value * 145.0377377;
case inHg: return value * 295.2998751;
case mmHg: return value * 7500.615613;
case MPA: return value;
}
break;
}
return 0;
}
```
使用此函数,您可以将给定单位的压力值转换为另一个单位:
```cpp
// 将10 kPa转换为bar
double value = 10.0;
double convertedValue = convertPressure(value, kPa, bar); // 0.1 bar
// 将20 psi转换为kPa
value = 20.0;
convertedValue = convertPressure(value, psi, kPa); // 137.89514 kPa
```
请注意,此函数仅处理上述指定的7个压力单位。如果您需要处理其他单位,则需要将此函数进行修改或添加其他情况。
阅读全文