如何从声明中更改结构父变量？

Question

struct Movement { 
    int left = 0; 
    int right = 0; 
}; 

struct TurnLeft : Movement { 
    left = 200; 
    right = MAX_SPEED; 
}; 

我想TurnLeft覆盖左侧和右侧。怎么样？

Answer 1

没有构造函数没有办法做到这一点。例如：

struct Movement { 
    int left = 0; 
    int right = 0; 
}; 

struct TurnLeft : Movement { 
    TurnLeft() : Movement{200, MAX_SPEED} { } 
}; 

live example on wandbox