Question

这是我的代码。我一直收到这个错误：

错误：'）'令牌
之前的预期主要表达式

任何人都有任何想法如何解决这个问题？

void showInventory(player& obj) {   // By Johnny :D
for(int i = 0; i < 20; i++) {
    std::cout << "\nINVENTORY:\n" + obj.getItem(i);
    i++;
    std::cout << "\t\t\t" + obj.getItem(i) + "\n";
    i++;
}
}

std::string toDo() //BY KEATON
{
std::string commands[5] =   // This is the valid list of commands.
    {"help", "inv"};

std::string ans;
std::cout << "\nWhat do you wish to do?\n>> ";
std::cin >> ans;

if(ans == commands[0]) {
    helpMenu();
    return NULL;
}
else if(ans == commands[1]) {
    showInventory(player);     // I get the error here.
    return NULL;
}

}

Answer 1

showInventory(player);传递类型作为参数。这是非法的，你需要传递一个物体。

例如：

player p;
showInventory(p);

我猜你有这样的事情：

int main()
{
   player player;
   toDo();
}

太可怕了。首先，不要将对象命名为与您的类型相同。其次，为了使对象在函数内可见，您需要将其作为参数传递：

int main()
{
   player p;
   toDo(p);
}

和

std::string toDo(player& p) 
{
    //....
    showInventory(p);
    //....
}

Answer 2

showInventory(player);     // I get the error here.

void showInventory(player& obj) {   // By Johnny :D

这意味着播放器是一种数据类型，而showInventory期望对播放器类型的变量进行referance。

所以正确的代码将是

  void showInventory(player& obj) {   // By Johnny :D
    for(int i = 0; i < 20; i++) {
        std::cout << "\nINVENTORY:\n" + obj.getItem(i);
        i++;
        std::cout << "\t\t\t" + obj.getItem(i) + "\n";
        i++;
    }
    }

players myPlayers[10];

    std::string toDo() //BY KEATON
    {
    std::string commands[5] =   // This is the valid list of commands.
        {"help", "inv"};

    std::string ans;
    std::cout << "\nWhat do you wish to do?\n>> ";
    std::cin >> ans;

    if(ans == commands[0]) {
        helpMenu();
        return NULL;
    }
    else if(ans == commands[1]) {
        showInventory(myPlayers[0]);     // or any other index,also is not necessary to have an array
        return NULL;
    }

}

如何修复“之前的预期主表达式”'令牌'错误？

2 个答案: