c++11 nullptr

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c++11 nullptr

#define _CRT_SECURE_NO_WARNINGS#include <iostream>#include <string>#include <vector>#include <map>void func(int a){    std::cout << __LINE__ << " a= " << a << std::endl;}void func(int *p){    std::cout << __LINE__ << " p= " << p << std::endl;}void mytest(){    int *p1 = nullptr;    int *p2 = NULL;    if (p1 == p2)    {        std::cout << "equal" << std::endl;    }    // int a = nullptr; // err, 編譯失敗，nullptr不能轉型為int    func(0); // 調用func(int)    func(NULL); // 調用func(int)    func(nullptr); // 調用func(int *p)    return;}int main(){    mytest();    system("pause");    return 0;}

 

c++11 nullptr