C++ Array and Reference Test

這幾天在學C++，對array跟reference的用法做個測試。

#include <iostream> #include <string> void test(std::string (&str)[2]){ std::cout << sizeof(str) << " " << sizeof(std::string); } int main(){ size_t n; std::cin >> n; size_t m = 2; const size_t o = 3; std::string *testStrArr1 = new std::string[n];// correct std::string testStrArr2[n]; // wrong in VC++, correct in gcc, wrong in ISO C++ std::string testStrArr3[2] = {"hello","hi"}; // correct std::string testStrArr4[m]; // wrong in VC++, correct in gcc, wrong in ISO C++ std::string testStrArr5[o]; // correct test(testStrArr1); // wrong test(testStrArr2); // wrong test(testStrArr3); // correct test(testStrArr4); // wrong test(testStrArr5); // wrong [3]->[2] }

正確的那行會印出: 8 4