#include"reg51.h"
#define COUNT_50MS 50000
unsigned char key,i;
struct IALA
{   
    unsigned char gcd;
    unsigned char state[6];
};
const struct IALA IALA4[4]={{0,0,0,0,0,0,0},{10,1,3,0,0,0,0},{10,1,1,1,7,0,0},{10,1,2,1,2,1,5}};
struct Turn
{
    unsigned int STATE[6];
};
struct Turn Counter50ms;
gcd =IALA4[key].gcd;
sum=0;
for(i=0;i<6;i++)   
{   
    sum=sum+gcd*IALA4[key].state[i];
    Counter50ms.STATE[i]=sum;        
}

void T0_ISR(void) interrupt 1
{
    //
TF0=0;              //自动清中断标志
   
static unsigned int j;
   
unsigned char k;
    TH0=(65536-COUNT_50MS)/256;
    TL0=(65536-COUNT_50MS)%256;
    j++;
    if(OPCON==0)        //黑夜、暗照度
    {
            for(k=0;k<2;k++)
        {
                  if(j==Counter50ms.STATE[2*k])
                  {   
                    D=0;       //熄灭LED灯
                  }
                  if(j==Counter50ms.STATE[2*k+1])
                  {
                        D=1;      //点亮LED灯
            }
        }
        if(j==Counter50ms.STATE[4])
            {   
                  D=0;           //熄灭LED灯
            }
            if(j>=Counter50ms.STATE[5])
        {
                  D=1;           //点亮LED灯
                  i=0;
            }
            i++;
    }
      else                  //白天、亮照度
          {
            D=0;               //熄灭LED灯
          }   
}


void main(void)
{
｛
    TMOD=(TMOD&0xf0)|0x01;
   
    TH0=(65536-COUNT)/256;
   
    TL0=(65536-COUNT)%256;
   
    ET0=1;        //中断使能
   
    EA=1;
   
    TR0=1;      //T0启动
   
    P1_0=0;
    while(1)
    {    key=0;
        if(P1^0==0&p1^1==0)
        key==0;
        if(P1^0==0&p1^1==1)            
        key==1;
        if(P1^0==1&p1^1==0)
        key==2;
        if(P1^0==1&p1^1==1)
        key==3;
    }   
}
}





{
    TMOD=(TMOD&0xf0)|0x01;
    TH0=(65536-COUNT)/256;
    TL0=(65536-COUNT)%256;
    ET0=1;        //中断使能
    EA=1;
    TR0=1;      //T0启动
    P1_0=0;
    while(1)    //等待TF0的到来
    {
        ;
    }
}
有4个错误求解怎么改

看题目，功能很简单，看程序，有点混乱，有错误把错误贴出来，不要叫别人去找，没意思。

把错误贴出来

不好意思，新手struct Turn Counter50ms;
gcd =IALA4[key].gcd;
sum=0;
for(i=0;i<6;i++)   
{   
    sum=sum+gcd*IALA4[key].state[i];
    Counter50ms.STATE[i]=sum;        
这几条周围有错

不好意思，新手
struct Turn Counter50ms;
gcd =IALA4[key].gcd;
sum=0;
for(i=0;i<6;i++)   
{   
    sum=sum+gcd*IALA4[key].state[i];
    Counter50ms.STATE[i]=sum;        
这几条周围有错

for(i=0;i<6;i++)
 gcd =IALA4[key].gcd;
keil提示在这两条语句前后有错误

struct Turn Counter50ms;
gcd =IALA4[key].gcd;
前面这个 gcd有没有定义？