問題初始化一個數組結構

Question

我想初始化下面的結構的下面的數組，但我的代碼沒有編譯。有人可以幫我嗎？

的結構/陣列：

struct DiningCarSeat { 
    int status; 
    int order; 
    int waiterNum; 
    Lock customerLock; 
    Condition customer; 

    DiningCarSeat(int seatNum) { 
     char* tempLockName; 
     sprintf(tempLockName, "diningCarSeatLock%d", seatNum); 
     char* tempConditionName; 
     sprintf(tempConditionName, "diningCarSeatCondition%d", seatNum); 
     status = 0; 
     order = 0; 
     waiterNum = -1; 
     customerLock = new Lock(tempLockName); 
     customer = new Condition(tempConditionName); 
    } 
} diningCarSeat[DINING_CAR_CAPACITY]; 

相關的錯誤：

../threads/threadtest.cc: In constructor `DiningCarSeat::DiningCarSeat(int)': 
../threads/threadtest.cc:58: error: no matching function for call to `Lock::Lock()' 
../threads/synch.h:66: note: candidates are: Lock::Lock(const Lock&) 
../threads/synch.h:68: note:     Lock::Lock(char*) 
../threads/threadtest.cc:58: error: no matching function for call to `Condition::Condition()' 
../threads/synch.h:119: note: candidates are: Condition::Condition(const Condition&) 
../threads/synch.h:121: note:     Condition::Condition(char*) 
../threads/threadtest.cc:63: error: expected primary-expression before '.' token 
../threads/threadtest.cc:64: error: expected primary-expression before '.' token 
../threads/threadtest.cc: At global scope: 
../threads/threadtest.cc:69: error: no matching function for call to `DiningCarSeat::DiningCarSeat()' 
../threads/threadtest.cc:51: note: candidates are: DiningCarSeat::DiningCarSeat(const DiningCarSeat&) 
../threads/threadtest.cc:58: note:     DiningCarSeat::DiningCarSeat(int) 

提前感謝！

Answer 1

有多種問題在這裏：

這些都應該是指針，因爲你是new荷蘭國際集團他們在你的構造函數：

Lock customerLock; 
Condition customer; 

你不申報類型seatNum：

DiningCarSeat(seatNum) { 

你不爲tempLockName或tempConditionName分配內存：

char* tempLockName; 
    sprintf(tempLockName, "diningCarSeatLock%d", seatNum); 
    char* tempConditionName; 
    sprintf(tempConditionName, "diningCarSeatCondition%d", seatNum); 

Answer 2

Condition和Lock沒有默認的構造函數。您應該使用initialization list來構建它們。

我會改變/爲Condition和Lock添加的構造，使他們能夠接受const char*和int。然後DiningCarSeat看起來像：

DiningCarSeat(int seatNum) : 
    status(0), 
    order(0), 
    waiterNum(-1), 
    cutomerLock("diningCarSeatLock", seatNum), 
    customer("diningCarSeatCondition", seatNum) 
{}