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Dec 17th, 2018
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  1. #include<iostream>
  2. #include<cmath>
  3. #include<fstream>
  4.  
  5. using namespace std;
  6.  
  7. int main(int argc, char** argv){
  8. ifstream f;
  9. f.open("plik1.txt");
  10. while(!f.eof()){
  11.  
  12. int a,b,c;
  13. float x1,x2;
  14.  
  15. cout<<"Rownanie kwadratowe" <<endl;
  16. f>>a;
  17. cout<<"wspoczynnik a: " <<a<<endl;
  18. f>>b;
  19. cout<<"wspoczynnik b: "<<b<<endl;
  20. f>>c;
  21. cout<<"wspoczynnik c: "<<c<<endl;
  22.  
  23. float delta=b*b-(4*a*c);
  24. if(delta<0){
  25. cout<<"Brak rozwiazan rownania"<<endl;
  26. }else if(delta == 0){
  27. x1 = -b/(2*a);
  28. cout<<"Jendo rozwiazanie rownania: "<<x1<<endl;
  29. }else if(delta >0){
  30. x1 = -b + sqrt(delta)/(2*a);
  31. x2 = -b - sqrt(delta)/(2*a);
  32. cout<<"Dwa rozwiazania: "<<endl;
  33. cout<<x1<<endl;
  34. cout<<x2<<endl;
  35.  
  36.  
  37. }
  38. f.close();
  39. ofstream f1("plik2.txt");
  40. //f1.open("plik2.txt");
  41. f1<< x1 << x2 <<endl;
  42. f1.close();
  43.  
  44.  
  45.  
  46.  
  47.  
  48.  
  49. }
  50. }
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