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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <cmath>
  4. using namespace std;
  5. int main()
  6. {
  7.        float a,b,c,d,x1,x2;
  8.        cin>>a>>b>>c;
  9.        d= b*b - 4*a*c;
  10.        if (d>=0){
  11.          x1=(-b+sqrt(d))/(2*a);
  12.          x2=(-b-sqrt(d))/(2*a);
  13.        if(x1==int(x1)) cout<<x1<<' ';
  14.        else
  15.              cout<<fixed<<setprecision(2)<<x1<<' ';
  16.        if(x2==int(x2)) cout<<x2<<' ';
  17.        else
  18.              cout<<fixed<<setprecision(2)<<x2<<' ';
  19.        }
  20.        else cout<<"方程无实数解"<<endl;
  21.        return 0;
  22. }
  23.  
  24.  
Success #stdin #stdout 0s 16064KB
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stdout
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方程无实数解
https://ideone.com/wtpZpX
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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