[C++ ] 7

[jasonfghx (工人)]

功能

用到的觀念

CODE
#include<iostream>//header file
#include<iomanip>
#include<cmath>
using namespace std;
using std::setw;
using std::fixed;
using std::setprecision;
#include<string>
using std::string;
using std::getline;
int hcf(int, int);
int main()
{
  double a,b,c,d,m1,m2;
   cout << "ax^2+bx+c=0 Please input a,b,c.\na= ";
        cin >> a;
        cout << "b= ";
        cin >> b;
        cout << "c= ";
        cin >> c;

        d = b*b-4*a*c;
        if(d>0)
        {
         cout<<"X1= "<<(-b+sqrt(d))/2*a<<endl;
         cout<<"X2= "<<(-b-sqrt(d))/2*a<<endl;
        }
        else if (d==0)
        {
         cout<<"X1=X2= "<<(-b+sqrt(d))/2*a<<endl;
        }
        else if (d<0)
        {
         cout<<"X1= "<<(-b)/2*a<<"+"<<sqrt(-d)/2*a<<"i"<<endl;
         cout<<"X2= "<<(-b)/2*a<<"-"<<sqrt(-d)/2*a<<"i"<<endl;
        }
        system("pause");
        return 0;
}


--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 140.112.7.59