сумма 5

#include<math.h>
#include<iomanip>
#include<iostream>
using namespace std;


float func(float e, float x , int &n)
{
float s = 0.0, a = 1.0, singl=1.0;
n = 0;
while (fabs(a) >= e)
{
s += a;
a = singl*pow(x,n) / ((n + 1.0) * (n + 4.0));
cout<<"a="<<a<<endl;
singl=-singl;
n++;
}
return s;
}

int main()

{
float a, b, e, h, x;
cin >> a >> b >> h >> e;
int n, i;
cout << setprecision(3);
cout << "i\t x\t f(x) \t n\n";
for (x=a,i=1; x<=b; x+=h, i++)
{func(x,e,n);
cout<<i<<"\t"<<x<<"\t"<<n<<endl;}
system("pause");
return 0;
}