求各位帮我看一下我的程序哪里错了，本程序的功能是4*4独立按键的第一行4个按键，控制数码管宣示0，1，2，3
- #include<reg52.h>
- #define uint unsigned int
- #define uchar unsigned char
- sbit dula=P2^6;
- sbit wela=P2^7;
- uchar num,temp;
- uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
- 0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
- void delay (uint z)
- {
- uint x,y;
- for(x=z;x>0;x--)
- for(y=110;y>0;y--);
- }
- void main()
- {
- wela=1;
- P0=0xc0;
- wela=0;
- dula=1;
- P0=0;
- dula=0;
- while(1)
- {
- P3=0xfe;
- temp=P3;
- temp=temp&0xf0;
- while(temp!=0xf0)
- {
- delay(5);
- temp=P3;
- temp=temp&0xf0;
- while(temp!=0xf0)
- {
- temp=P3;
- switch(temp)
- {
- case 0xee:
- num=1;
- break;
- case 0xde:
- num=2;
- break;
- case 0xbe:
- num=3;
- break;
- case 0x7e:
- num=4;
- break;
- }
- dula=1;
- P0=table[num-1];
- dula=0;
-
- }
- }
-
- }
- }
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