برنامه محاسبه ریشه معادله درجه دوم.

فایل متنی

فایل cpp

#include "stdafx.h"

#include "iostream"

#include "cmath"

using namespace std;

//alidoran

int main() {

int x, a, b, c;

float z1, z2, delta;

cout << "you must enter a,b,c in this method" << endl << "ax^2+bx+c=0"<<endl;

cout << "please input a:";

cin >> a ;

cout << "please input b:";

cin >> b;

cout << "please input c:";

cin >> c;

delta = (b * b ) - (4 * a*c);

if (delta < 0) {

cout << "dont have answer" << endl;

system("pause");

return 0;

}

z1 = ((-b) - sqrt(delta)) / (2 * a);

z2 = ((-b) + sqrt(delta)) / (2 * a);

if (z1==z2) cout << z1;

else cout << z1 << endl << z2 ;

cout << endl;

system("pause");

return 0;

}