如何從聲明中更改結構父變量？

Question

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

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

我想TurnLeft覆蓋左側和右側。怎麼樣？

Answer 1

沒有構造函數沒有辦法做到這一點。例如：

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

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

live example on wandbox