void main()中修改试看 unsigned char k = 0; P1=P2=P3=0; while(1) { ++k; if(k>0&&k<9){if(k==1){P3=0;P1=128;}P1=_crol_(P1,1);delay(47000);} else if(k>8&&k<17){if(k==9){P1=0;P2=128;}P2=_crol_(P2,1);delay(47000);} else if(k>16&&k<25){if(k==17){P2=0;P3=128;}P3=_crol_(P3,1);delay(47000);} } |