按行给下列代码添加注释 try { system = confReader.getValue("system"); elev = confReader.getValueAsDouble("elevation"); begin_sod = confReader.getValueAsDouble("begin_sod"); end_sod = confReader.getValueAsDouble("end_sod"); rcvState = confReader.getValueAsInt("rcvState"); } catch (Exception& e) { cerr << e << endl; exit(-1); }
时间: 2024-04-03 12:32:13 浏览: 18
try {
// 从配置文件中读取 system 参数的值
system = confReader.getValue("system");
// 从配置文件中读取 elevation 参数的浮点型值
elev = confReader.getValueAsDouble("elevation");
// 从配置文件中读取 begin_sod 参数的浮点型值
begin_sod = confReader.getValueAsDouble("begin_sod");
// 从配置文件中读取 end_sod 参数的浮点型值
end_sod = confReader.getValueAsDouble("end_sod");
// 从配置文件中读取 rcvState 参数的整型值
rcvState = confReader.getValueAsInt("rcvState");
} catch (Exception& e) {
// 若读取配置文件出现异常,则输出异常信息并退出程序
cerr << e << endl;
exit(-1);
}
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解释以下c++代码ConfigReader confReader; try { confReader.open("/home/ckj/navbox-1.4-textbook/apps/spp.conf"); } catch (Exception &e) { cerr << "please put spp.conf in current directory!" << endl; exit(-1); } /// Tropospheric model NeillTropModel neillTM; string system; double elev; double begin_sod; double end_sod; int rcvState; try { system = confReader.getValue("system"); elev = confReader.getValueAsDouble("elevation"); begin_sod = confReader.getValueAsDouble("begin_sod"); end_sod = confReader.getValueAsDouble("end_sod"); rcvState = confReader.getValueAsInt("rcvState");// }
这段代码是在C++中使用一个ConfigReader对象来读取名为spp.conf的配置文件,并从该文件中获取一些值,包括system、elevation、begin_sod、end_sod和rcvState等参数。如果在打开配置文件的过程中出现任何异常,程序将输出一条错误消息并退出。在这段代码中还创建了一个NeillTropModel对象,但是在这里并没有使用。
//系统状态 byte systemState =ProtocolData.systemState.POSITION_1.getValue();//todo:定义一个数组if判断 byte systemState =ProtocolData.systemState.POSITION_2.getValue(); byte systemState =ProtocolData.systemState.POSITION_3.getValue(); byte systemState =ProtocolData.systemState.POSITION_4.getValue(); byte systemState =ProtocolData.systemState.MIDDLE_PROCESS.getValue(); byte systemState =ProtocolData.systemState.MAVIGATION_STAT.getValue(); 把这段代码用if判断
可以将这段代码改写为以下形式:
```
byte systemState;
if (ProtocolData.systemState == POSITION_1) {
systemState = POSITION_1.getValue();
} else if (ProtocolData.systemState == POSITION_2) {
systemState = POSITION_2.getValue();
} else if (ProtocolData.systemState == POSITION_3) {
systemState = POSITION_3.getValue();
} else if (ProtocolData.systemState == POSITION_4) {
systemState = POSITION_4.getValue();
} else if (ProtocolData.systemState == MIDDLE_PROCESS) {
systemState = MIDDLE_PROCESS.getValue();
} else if (ProtocolData.systemState == MAVIGATION_STAT) {
systemState = MAVIGATION_STAT.getValue();
}
```
这样可以根据不同的 `ProtocolData.systemState` 值来分别赋值给 `systemState` 变量。