page 105 ,inquiry 3
#include"conio.h"
#include"iostream.h"
void main()
{
double sum=0;
short int sign;
int g,n;
unsigned int f=1;
cout<<"please enter n:";
cin>>n;
for(int i=1;i<=n;i++)
{
f*=i;
if(i%2==0)
{
sign=-1;
g=sign*(i/f);
sum-=g;
}
else if(i%2!=0)
{
sign=1;
cout<<"+";
g=sign*(i/f);
sum+=g;
}
cout<
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