[Error] no matching function for call to 'Worker::Worker()'
时间: 2024-02-17 18:01:13 浏览: 52
这个错误是因为没有Worker类的默认构造函数(无参构造函数),在代码中尝试创建Worker对象时,编译器无法找到匹配的构造函数进行对象的构建。解决这个问题的方法有两个:
1. 在Worker类中添加默认构造函数,例如:
```
class Worker {
public:
Worker() {}
//...
};
```
2. 在创建Worker对象时,显式地调用有参数的构造函数,例如:
```
Worker w("Tom", 25, 5000);
```
这样就可以避免编译器无法找到匹配的构造函数而出现的错误。
相关问题
no matching function for call to widget::connect
This error message typically occurs in Qt when you try to connect a signal to a slot, but the arguments of the signal and the slot do not match. To fix it, you need to make sure that the arguments of the signal and the slot are compatible.
For example, if you have a signal that takes an integer parameter and a slot that takes a string parameter, you will get this error message. To fix it, you either need to change the signal to take a string parameter or change the slot to take an integer parameter.
Here's an example of how to connect a signal to a slot with compatible arguments:
```
QObject::connect(sender, &Sender::valueChanged, receiver, &Receiver::updateValue);
```
In this example, the signal "valueChanged" takes an integer parameter and the slot "updateValue" also takes an integer parameter, so they are compatible. If your code is still giving you the "no matching function for call to widget::connect" error message, double-check the arguments of the signal and the slot to make sure they match.
报错no matching function for call to std::bind
这个错误通常是因为您使用了错误的参数类型或数量来调用std::bind()函数。std::bind()函数的参数应该是一个可调用对象和一些参数,用于绑定该可调用对象的参数。如果您的参数不匹配,编译器将无法找到匹配的函数,并报告“no matching function for call to std::bind”错误。
要解决这个问题,您应该检查您的std::bind()函数调用,并确保它们使用正确的参数类型和数量。如果您仍然无法解决问题,请考虑使用其他函数或方法来实现您的需求。