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º»¹®³»¿ë [machine_eps.cpp]

#include
int main(void)
{
/* double body=2, test=1,meps; */
float body=2,test=1,meps;
for( ;body>1.; )
{
test=test/2;
body=1+test;
if(body>1.) meps=test;
}
printf('Machine epsilon = %16.8e',meps);
return 0;
}

[rounding_off.cpp]

#include
main()
{
float sum1=1.0, sum0=0.0, dif=0.000001;
double dsum1=1.0,dsum0=0.0,ddif=0.000001;
int i;

for(i=1;i<=10000;i++)
{
sum1=sum1+dif; dsum1=dsum1+ddif;
sum0=sum0+dif ; dsum0=dsum0+ddif ;
}

printf('Sum1 = %f, Sum0 = %fn',sum1,sum0+1.0);
printf('dSum1 = %f, dSum0 = %f',dsum1,dsum0+1.0);

}
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