#define SUB(a) (a)-(a)什么意思定义了这个宏以SUB(c+b)×d应该怎么运算?

C语言中：#define SUB(a) (a)-(a) #define SUB(a) (a)-(a)什么意思定义了这个宏以SUB(c+b)×d应该怎么运算? #define SUB(a) (a)-(a) 　　main() 　　{ int a=2,b=3,c=5,d;d=SUB(a+b)*c;　　printf(%d ,d);　　} #define F(a) #define A B #define LT(a,b) ((a) define what is a motel how do you define a love poem? define what is a student's association disablity doesn't define a person 求表达式B/B的值?#define A 3+2 #define B A*A #define A ((a *)b) 是什么意思uCon = GPIO->rGPIOMCON；#define GPIO ((volatile oGPIO_REGS *)GPIO_BASE) 写出下列程序段的输出结果.#define A 10 #define B (A C语言中 #define N 30 #define IFADOB(A,B) ((A)&&(B,0)) ＃define max(a,b) a>b?a：b中的?和： Private Sub Command1_Click() Dim a As Long a = 1234 a& = 4567 Print a; a& End Sub a meatball sub.sub在这里是submarine sandwich 还是subway 的意思? # define A 3 # define B(a) (( A + 1 )*a ) M x = 3*( A + B( 7 ) ) ;# define A 3# define B(a) (( A + 1 )*a )Mx = 3*( A + B( 7 ) ) ;这个要怎么解答