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& a o: @) N; @! _" Z#include
x8 x2 h/ o1 ~5 tunsigned char ZH(unsigned char BCD);7 {% g& V/ Q7 ?) U
void delay(int time);
6 K) r' A- ^# K A9 Tsfr LED=0xA0;//定义LED为P2口的地址! i; p8 ^5 s9 l! O% r
void main(){/ h1 i* x C# i% X' ~( M
while(1){
, X' l* b4 I. C5 B( U# r unsigned char i;
. B3 i: U( m: H# f for(i=0;i<100;i++){
7 W5 F; I3 U6 b2 |, @ LED=ZH(i);# h3 q. c! \2 D* F
delay(1000);. l) J5 s" d0 ^( e/ r
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}
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unsigned char ZH(unsigned char BCD){8 }5 ?$ M! h9 a6 F" b: { Q+ K
unsigned char X;
# K$ ^, x! h' x6 G2 @- i' w4 U unsigned char Y;! L A% S& N4 [6 J4 C: M
X=BCD/10;
$ N! ^. r6 k9 e4 v" o Y=BCD%10;
+ K( {# v8 D+ C0 `6 d4 T6 l$ H0 d X<<=4;4 t8 V3 x9 Z' R7 Y- E" b# S+ Y
return X|Y;
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void delay(int time){+ E8 l+ N" k# D5 d d- I
unsigned char j;! B1 i: t% D6 K2 A: s; x
for(time;time>=0;time--)
1 \3 g: n3 G+ y5 I: d0 c for(j=125;j>0;j--)
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