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#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar num;
void main()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
TR0=1;
P1=0xFF;
while(1);
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
num++;
if(num==20)
{
num=0;
if(P1==0x00)
{
P1=0xFF;
}
else
P1=P1>>1;
}
}
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1.
printf("%.9lf\n",sum);
//Êä³öСÊýµãºó9λ²»Ê¡È¥Ä©Î²¶àÓàµÄ0
2.
printf("%.10g\n",sum);
//Êä³öСÊýµãºó9λ²»Ê¡È¥Ä©Î²¶àÓàµÄ0
3.
#include<iomanip>
cout<<setprecision(10)<<sum<<endl;
//Êä³öСÊýµãºó9λʡȥĩβ¶àÓàµÄ0
4.
#include<iomanip>
cout.pre ......