Функции

//Лабараторная работа 8
#include <iostream.h> 
#include <math.h> 
#include <iomanip.h>
const double P=3.14; 
     typedef double (*uf)(double, double, int &); 
 
void tabl(double, double, double, double, uf); 
double y(double, double, int &); 
double s(double, double, int &); 
 
int main() 
{ 
    cout << setw(8) <<"x"<< setw(15) <<"y(x)"<< setw(10) << "k" << endl; 
    tabl(-2.0,2.0,0.1,0.0001,y); 
    cout << endl; 
    cout << setw(8) <<"x"<< setw(15) <<"s(x)"<< setw(10) << "k" <<endl ; 
    tabl(-2.0,2.0,0.1,0.0001,s); 
    return 0; 
} 
 
void tabl(double a, double b, double h, double eps, uf fun) 
{
    int k=0;  
  double sum; 
  for (double x=a; x<b+h/2; x+=h) 
  { 
   sum=fun(x,eps,k); 
       cout << setw(8) << x << setw(15) << sum << setw(10) << k << endl; 
  } 
} 
 
double y(double x, double eps, int &k) 
{
    return P*(P-2*fabs(x))/8; 
} 
 
double s(double x, double eps, int &k) 
{
    double c,sum; 
    sum=cos(x)/1; 
    k=1; 
    double o,u;
    while (fabs(c)>eps) 
 {
        o=cos(2*k-1)*x;
        u=pow(2*k-1,2);
        c=o/u;
        sum +=c;
        k++; 
    } 
return sum; 
}