#include<iostream>
#include <windows.h>
#include <string>
using namespace std;#define Conn(x,y) x##y   //表示x连接y
#define tochar(x) #@x //给x加上单引号，结果返回是一个const char
#define tostring(x) #x  //给x加双引号 返回char const *#define MEM_B(x)(*((byte*)(x))) //得到指定地址上的一个字节
#define MEM_W(x)(*((WORD*)(x))) //得到指定地址上的一个字  WORD 16-bit unsigned integer DWORD 32 - bit unsigned integer
#define OFFSETOF(type,field) ((size_t)& ((type*)0)->field)  //得到一个field在结构体（struct type）中的偏移量。
#define FSIZ(type,field) sizeof( ((type *) 0)->field )  // 得到一个结构体中field所占用的字节数 //得到一个变量的地址（word宽度）
#define B_PTR( var ) ( (byte *) (void *) &(var) )  
#define W_PTR( var ) ( (WORD *) (void *) &(var) )#define UPCASE( c ) ( ((c) >= 'a' && (c) <= 'z') ? ((c) - 0x20) : (c) ) //将一个字母转换为大写
#define INC_SAT( val ) (val = ((val)+1 > (val)) ? (val)+1 : (val)) //防止溢出的一个方法
#define ARR_SIZE( a ) ( sizeof( (a) ) / sizeof( (a[0]) ) ) //返回数组的个数//ANSI标准说明了五个预定义的宏名。它们是：
#define _LINE_ __LINE__ /*(两个下划线)，对应%d*/
//_FILE_ /*对应%s*/
//_DATE_ /*对应%s*/
//_TIME_ /*对应%s*/struct Person 
{string name;int age;
};void test01()
{cout << Conn(123, 444) << endl; //123444cout << Conn("abc", "efg") << endl; //abcefgauto a2 = tochar(4);cout << a2 << endl;  // a2='4'cout << typeid(a2).name() << endl;auto a3 = tostring(43434);cout << a3 << endl; //a3="43434"cout << typeid(a3).name() << endl;int bTest = 0x123456; //0001 0010 0011 0100 0101 0110byte m = MEM_B((&bTest));cout << int(m) << endl;//86 = 0101 0110  一个字节8bitint n = MEM_W((&bTest));/*n=0x3456*/cout << int(n) << endl;   //13398  = 0011 0100 0101 0110  一个WORD 16bitstruct Person p = { "dsd",88 };cout << OFFSETOF(Person, name) << endl; //0cout << OFFSETOF(Person, age) << endl; //28cout << FSIZ(Person, age) << endl; //4cout << FSIZ(Person, name) << endl; //28int num = 97;cout << B_PTR(num) << endl;  // a 97cout << W_PTR(num) << endl;  //0019FD98cout << UPCASE('a') << endl; //65  = Aint num1 = 99;int num2 = 99999999999999999;cout << INC_SAT(num1) << endl; //100cout << INC_SAT(num2) << endl; //1569325056int arr[] = { 1,2,43,5 };int arr1[][4] ={{1, 2, 3, 5},{ 1,2,3,5 },};cout << ARR_SIZE(arr) << endl; //4cout << ARR_SIZE(arr1) << endl; //2int x = 0;int y = 10;if (y > x) {printf("Error: y is greater than x at line %d\n", _LINE_);}
}int main()
{	test01();system("pause");return 0;
}