c++ 宏 试验

// 宏试验.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <iostream>
#include <string>
using namespace std;
//宏定义
#define hong1 1;
//宏函数
#define hong2(a) a*a
//连接字符串
#define hong3(a,b) a##b
//把数字变成字符串
#define hong4(a) #a;
//把数字变成字符
#define hong5(a) #@a;
#define hong6(a,...) hong6_2(a,hong1)
#define hong6_2(a,b) a##b

#define myprintf(templt, ...) fprintf(stderr,templt, ##__VAR_ARGS__)

int main()
{
    cout << "Hello World!\n";
    cout << hong1;
    cout << "\n";
    cout << hong2(5) << "\n";
    cout << hong3(5, 6) << "\n";
    cout << hong3("A", "b") << "\n";
    string str = hong4(5);
    cout << str + "\n";
    char char1 = hong5(5);
    cout << char1 + "\n";
   // myprintf(5);
    //cout << hong6(5, ...) << "\n";
}