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C51按键识别，等待释放
#includeunsigned char val;unsigned char i,j,k;sbit k1=P3^4;void delayms(int ms) // 1ms{unsigned char i,j;for(;ms>0;ms--)for(i=6;i>0;i--)for(j=82;j>0;j--);}void main(){val=0xff;while(1){if(k1==0){delay
#includeunsigned char val;unsigned char i,j,k;sbit k1=P3^4;void delayms(int ms) // 1ms{unsigned char i,j;for(;ms>0;ms--)for(i=6;i>0;i--)for(j=82;j>0;j--);}void main(){val=0xff;while(1){if(k1==0){delay
