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  1. #include <iostream>
  2. using namespace std ;
  3. #include <math.h>
  4. main()
  5. {
  6. 	int a,b,c;
  7. 	float d;
  8. 	cin>>a>>b>>c;
  9. 	d=(b*b-4*a*c);
  10. 	if (a==0)
  11. 	cout<<"phuong trinh co 1 nghiem duy nhat "<<float(-c/b);
  12.  
  13. 	else
  14. 	{
  15. 		if (a!=0)
  16. 		if (d<0)
  17. 		cout<<"phuong trinh vo nghiem";
  18. 		else
  19. 		if (d=0)
  20. 		cout<<"phuong trinh co nghiem kep"<<float(-b/(2*a));
  21. 		else
  22. 		if (d>0)
  23. 		cout<<"phuong trinh co 2 nghiem phan biet"<<(float)((-b+sqrt(d))/(2*a));
  24. 	    cout<<"phuong trinh co 2 nghiem phan biet"<<(float)((-b-sqrt(d))/(2*a));
  25.  
  26. 	}
  27. }
Success #stdin #stdout 0s 16064KB
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phuong trinh vo nghiemphuong trinh co 2 nghiem phan biet-nan
https://ideone.com/vVHAL8
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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