#define FOR while(x--) int x=3,y=0; FOR {y++; } printf("x=%d,y=%d",x,y);为什么x=-1,y=3呢?x等于0时,循环不就停止了吗?

#define FOR while(x--) int x=3,y=0; FOR {y++; } printf(x=%d,y=%d,x,y);为什么x=-1,y=3呢?x等于0时,循环不就停止了吗? 新手求解这个程序的意思,#include #define uint unsigned int#define uchar unsigned char uchar a,b,temp,table[]={0xe7,0xdb,0xbd,0x7e,0xbd,0xdb,0xe7}; void delay(uint z){ uint x,y; for(x=z;x>0;x--)for(y=110;y>0;y--); }void main(){ while(1) { te void delayms(uint j){uchar i;for(;j>0;j--){i=250;while(--i);i=249;while(--i);}有几个宏定义忘记写了,现在补上.#define uchar unsigned char#define uint unsigned int#define out P2 这个宏是什么意思#define st(x) do { x } while (__LINE__ == -1)zstack中进入退出临界区的宏定义是#define HAL_ENTER_CRITICAL_SECTION(x) st( x = EA; HAL_DISABLE_INTERRUPTS(); )#define HAL_EXIT_CRITICAL_SECTION(x) st( EA = x; )其中st( 求每一步的解释 意义#pragma argsused#define C(x,y) xo##y#define FOR(x) for(C(a,x)=1;C(a,x) #define s(x) 3 #define S(x) 3 define fun(x, #define configASSERT( x ) #define min(x,y) (x #define MIN(x,y)(x) #define __T(x) L ## x #define get2byte(x) ((x)[0] #define 关于定积分~错哪儿了?急~# include # define N 100# define F(x) (x)*(x)*(x)float sab(float a,float b){ float h,sum=0; scanf(%f%f,&a,&b); h=(b-a)/N; for(;a #define SETBIT(x,y) (x|=(1 #define MEM_B( x ) ( *( (byte *) (x) ) 我看不懂 #define get_u8(X,O) (*(u8 *)(((u8 *)X) +