Δ=b^2-4ac C++编写的一元二次议程判断式

判别式.rar

#include <iostream>
using namespace std;
int main(){

    double  a,b,c;
    double x,y;
    double zhi;
    cout<<"判别式：:Δ=b^2-4ac\n";
    cout<<"ax^2+bx+c=y\n";
    cout<<"请输入:";
    cout<<"\ta=";
    cin>>a;
    cout<<"\tb=";
    cin>>b;
    cout<<"\tc=";
    cin>>c;
    cout<<a<<"x^2+"<<b<<"x+"<<c<<"=y";
    zhi=(b*b)-4*a*c;
    cout<<"\nΔ="<<zhi;
    if(zhi>0){
        cout<<"\n方程有两个不等实数根";
    }
    if(zhi==0){

    cout<<"\n方程有两个相同的实数根";
    }
    if(zhi<0){
        cout<<"\n方程无实数根";
    }
}