main.c(39): error C141: syntax error near 'else', expected '__asm'

ID:1069151 · 發(fā)表于 2023-3-30 22:03

#include "reg52.h"

typedef unsigned int u16;
typedef unsigned char u8;

sbit key1=P3^1;
sbit key2=P3^0;
sbit key3=P3^2;
sbit key4=P3^3;

sbit LED_1=P2^0;

#define key1_1 1;
#define key2_2 2;
#define key3_3 3;
#define key4_4 4;
#define key_wu_chi_li 0;

void shi_jian(u16 time)
{
while(time--);

}

time=100;

u8 key_scan(u8 mode)
{
static u8 key=1;

if(mode)key=1;
if(key==1&&(key1==0||key2==0||key3==0||key4==0))//任意按鍵按下
{

shi_jian(time);//消抖

key=0;

if(key1==0)
return key1_1;
else if(key2==0)
return key2_2;
else if(key3==0)
return key3_3;
else if(key4==0)
return key4_4;
}
else if(key1==1&&key2==1&&key3==1&&key4==1)
{
key=1;
}
return key_wu_chi_li;
}

void main()
{
u8 key=0;
while(1)
{
key=key_scan(0);
if(key==key1_1)//檢測按鍵 K1 是否按下
LED_1=!LED_1;//LED1 狀態(tài)翻轉(zhuǎn)
}
}

ID:94031 · 發(fā)表于 2023-3-31 07:06

直接if，不要else if。

ID:353115 · 發(fā)表于 2023-3-31 08:14

#define 的定義后面加分號，你看看都替換成啥了

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