预处理...

#include <stdio.h>
struct Student {
	char * name;
	int age;
};

#define Student struct Student

#define SUM(a) (a + a)

#define MULTIPLY(a, b) (a * b)

#define mPrintf(a) printf("a = %d\n", a)

// 宏定义多个语句.
#define M3(m, n)   \
	m = c + 2; \
	n = c * 2;

#define MAX(a, b) a > b ? a : b

int main(int argc, const char * argv[])
{
	// #define M 10
	// #undef M

	Student stu = { "项羽", 55 };

	printf("%s,%d\n", stu.name, stu.age);

	int a = SUM(3);
	printf("%d\n", a);

	int b = MULTIPLY(3, 4);
	printf("%d\n", b);
	mPrintf(b);

	// 宏定义多个语句.
	int c = 5;
	int m, n;
	M3(m, n);

	printf("%d %d\n", m, n);

	//************************ stone ***

	int max = MAX(55, 116);
	printf("%d\n", max);

	int i = 55, j = 116;
	int mm = i > j ? i : j;
	printf("%d\n", mm);

	return 0;
}