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  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4.  
  5. int main() 
  6. {
  7. 	typedef double Operation(double a,double b);
  8. 	const struct { char sign; Operation *op; } tb[]=
  9. 	{
  10. 		{'+',[](double a,double b) { return a+b; }},
  11. 		{'-',[](double a,double b) { return a-b; }},
  12. 		{'*',[](double a,double b) { return a*b; }},
  13. 		{'/',[](double a,double b) { return a/b; }},
  14. 	};
  15. 	char sign;
  16. 	for(double a,b;(cout<<"Podaj wyrażenie (np 2*2): ")&&(cin>>a>>sign>>b>>ws);)
  17. 	{
  18. 		for(size_t i=0;i<sizeof(tb)/sizeof(*tb);++i)
  19. 		{
  20. 			if(tb[i].sign==sign)
  21. 			{
  22. 				cout<<a<<' '<<sign<<' '<<b<<" = "<<tb[i].op(a,b)<<endl;
  23. 				sign=0;
  24. 				break;
  25. 			}
  26. 		}
  27. 		if(sign) cout<<"Nieznana operacja"<<endl;
  28. 	}
  29. 	return 0;
  30. }
Success #stdin #stdout 0s 4536KB
comments (?)
stdin
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2*4
stdout
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Podaj wyrażenie (np 2*2): 2 * 4 = 8
Podaj wyrażenie (np 2*2):
https://ideone.com/WbECpr
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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