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#include<reg52.h>
sbit key1=P3^2;
sbit key2=P3^3;
sbit key3=P3^4;
sbit key4=P3^5;
sbit out1=P0^0;
sbit out2=P0^1;
void delay(unsigned int cnt)
{
while(--cnt);
}
main()
{
P0=0xff;
while(1)
{
{if(!key1)
out1=0;
out2=0;}問題：我想在此加入1S延時，使之在亮1S后為1，就是關閉？
{if(!key2)
out1=1;}
}
}
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