[Ｃ++] 上機第七題

[vincent79715 (軒~)]

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
        int a,b,c;
        double D;
        cout<<"請輸入係數a,b,c"<<endl;
        cin>>a>>b>>c;
        D=b*b-4*a*c;
        if(D>0)
        {
                D=sqrt(D);
                cout<<((-b+D)/2/a)<<" "<<((-b-D)/2/a);
        }
        else if(D==0)
                cout<<"有重根:"<<-b/2/a;
        else
                cout<<"無實數解";
    system("PAUSE");
        return 0;
}

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