嘗試

關鍵字 try 後跟一個塊，或者是建構函式初始化列表，然後是一個塊（參見此處 ）。try 塊後跟一個或多個 catch 塊 。如果異常傳播出 try 塊，則 try 塊之後的每個相應 catch 塊都有機會處理異常（如果型別匹配）。

std::vector<int> v(N);     // if an exception is thrown here,
                           // it will not be caught by the following catch block
try {
    std::vector<int> v(N); // if an exception is thrown here,
                           // it will be caught by the following catch block
    // do something with v
} catch (const std::bad_alloc&) {
    // handle bad_alloc exceptions from the try block
}