switch語句多字符常量

Question

我想這個轉換成switch語句

if (codeSection == 281) 
    cout << "bigamy"; 
else if (codeSection == 321 || codeSection == 322) 
    cout << "selling illegal lottery tickets"; 
else if (codeSection == 383) 
    cout << "selling rancid butter"; 
else if (codeSection == 598) 
    cout << "wounding a bird in a public cemetery"; 
else 
    cout << "some other crime"; 

// Actual switch statement 
switch (codeSection) 
{ 
    case '281': 
     cout << "bigamy" << endl; 
     break; 

    case '321': 
    case '322': 
     cout << "selling illegal lottery tickets" << endl; 
     break; 

    case '383': 
     cout << "selling rancid butter" << endl; 
     break; 

    case '598': 
     cout << "wounding a bird in a public cemetery"; 
     break; 

    default: 
     cout << "some other crime"<< endl; 

} 

編譯器說switch語句多字符常量，並給了我一個黃色的警告，但仍然編譯。我的問題是這種情況應該只是字符形式？類似情況下，「2」

Answer 1

case '281': 

應該

case 281: 

，同樣的休息，否則編譯器「認爲」您嘗試使用多字符常量，這是不是你大概是什麼想。

A case不一定是char。實際上，它必須是一種與轉換和積分促銷後的條件類型相同類型的常量表達式，請參閱http://en.cppreference.com/w/cpp/language/switch。