琪露诺的编程教室（C++代码）

解题思路:





注意事项:





参考代码:

#include <stdio.h>

#include <iostream>

#include <iomanip>

#include <cmath>

using namespace std;

int dayu(double a,double b,double c)

{

double x1,x2,t;

t=b*b-4*a*c;

cout<<"x1="<<fixed<<setprecision(3)<<(-b)/(2*a)<<"+"<<sqrt(t)/(2*a)<<"i"<<" ";

cout<<"x2="<<(-b)/(2*a)<<"-"<<sqrt(t)/(2*a)<<"i"<<endl;

}

int dengyu(double a,double b,double c)

{

cout<<"x1="<<fixed<<setprecision(3)<<(-b)/(2*a)<<" ";

cout<<"x2="<<(-b)/(2*a)<<endl;

}

int xiaoyu(double a,double b,double c)

{

double t;

t=b*b-4*a*c;

cout<<"x1="<<fixed<<setprecision(3)<<(-b)/(2*a)<<"+"<<sqrt(-t)/(2*a)<<"i"<<" ";

cout<<"x2="<<(-b)/(2*a)<<"-"<<sqrt(-t)/(2*a)<<"i"<<endl;

}

int main()

{

double a,b,c,t;

cin>>a>>b>>c;

t=b*b-4*a*c;

if(t>0)

dayu(a,b,c);

else if(t==0)

dengyu(a,b,c);

else

xiaoyu(a,b,c);

}