#define VAR(x) (((x) ＞ 0) ? (x) : (-(x)))——c++

#include 
using namespace std;
#define POSITIVE(x) ((x) > 0)    //x为正数，输出为1；x为负数，输出为0
#define NEGATIVE(x) ((x) < 0)     //x为正数，输出为0；x为负数，输出为1
#define VAR(x) (((x) > 0) ? (x) : (-(x)))   //输出x的绝对值
int main()
{
	int a = 9;
	int b = -5;
	cout << POSITIVE(a) << endl;
	cout << NEGATIVE(a) << endl;
	cout << VAR(a) << endl;

	cout << POSITIVE(b) << endl;
	cout << NEGATIVE(b) << endl;
	cout << VAR(b) << endl;
	system("pause");
	return 0;
}