include stdio include math double f1 double return pow cos double f2 d

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

double f1(double x){
	return 1./pow(cos(x),4);
}

double f2(double x){
	return 2*x+x*x;
}

double Integral(double f (double),  int np, int vp, int N){
	double x;
	double sum=0;
	
	x = np+(vp-np)/(double)N;
	while(x<vp){
		sum+=f(x);
		x+=(vp-np)/(double)N;
	}
	
	sum+=(f(np)+f(vp))/2;
	sum*=(vp-np)/(double)N;
	
	return sum;
}

int main(){
	printf("Intergal 1 = %f\n", Integral(f1,2,5,35));
	printf("Intergal 2 = %f\n", Integral(f2,-2,2,35));
	
	return 0;
}