integration med programmering

Kode 

#include <stdio.h>
#include <stdlib.h>
#include <math.h>


double Pk(double Tovn)
{
	double x=1/38*(Tovn - 25);
    return (x);
}

double Ps(double Tovn)
{
	int i, j, k, m;
	i = pow(Tovn,4);
	j = pow(10.0,-8);
	k = pow(10.0,-6);
	m = pow(25.0,4);
	double x=(0.0025*5.67*j*i - 0.0025*5.67*k*m);
//	double x=8.7;
    return (x);
}

int main()
{
	double Pk(double Tovn);
	double Ps(double Tovn);

//Summation for Tovn

	double Tovn = 100;
	double t = 0;
	double Pma = 7.5;
//	double Pma = Pel;
	double dt=1;
	while (t < 110)
	{
		t = t + dt;
		Tovn = Tovn + 1.0/30 * (Pma - Pk(Tovn)- Ps(Tovn))* dt;
	}
	
	printf("tiden som de ttager er %.1f sekunder.\n",Tovn);
	printf("Tabseffekt Pk = %f\n",Pk(Tovn));
	printf("Tabseffekt Ps = %f\n",Ps(Tovn));
	system("pause");
	return 0;
}