1сем Дагаев / ЛР4 / Lr4

#include <iostream>
#include <windows.h>

using namespace std;

float Sum(int *n, float *x1) {
	float x = *x1;
	float f = 0;
	int znak = -1;
	for (int k = 1; k <= *n; k++) {
		f = f + znak*k*x / (x*x + k*k);
		znak = -znak;
	}
	return f;
}

void main() {
	int n;
	float z, x;
	system("cls");
	cout << "Vvedite n(int) & x(float) = ";
	cin >> n >> x;
	z = 1 / x + Sum(&n, &x);
	cout << "z = " << z << endl;
	system("pause");
}