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Help with Measurement converter

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Help with Measurement converter

 
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  #1
Nov 25th, 2008
Hey I am trying to teach myself C++ and i am having trouble with a measurement converter I am pretty sure my problem is in the line

C++ Syntax (Toggle Plain Text) 
  1. Yards = Meters * 1.094;

but i don't know how else to write it, this is my code:

C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. namespace std;
  3.  
  4. int main()
  5. {
  6. 	cout << "welcome to my measurement converter.";
  7. 	cout << "This converter will convert meters to yards.\n";
  8. 	cout << "Enter the number of meters.\n";
  9. 	int Meters;
  10. 	int Yards;
  11. 	cin >> Meters;
  12. 	Yards = Meters * 1.094;
  13. 	cout << Meters << " meters is equal to " << Yards << " yards";
  14. 	return 0;
  15. }

Your help would be greatly appreciated
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Re: Help with Measurement converter

 
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  #2
Nov 25th, 2008
2 things.
Change :
namespace std; to using namespace std; . Your code shouldn't compile without changing it.

then change:
C++ Syntax (Toggle Plain Text) 
  1. int Meters;
  2. int Yards;
to:
C++ Syntax (Toggle Plain Text) 
  1. double Meters;
  2. double Yards;

Int can only be integer values So: 1, 4 , 300, 5632 etc etc.
But you need some digits after the comma, so you need the double data-type
Last edited by niek_e; Nov 25th, 2008 at 6:45 am.
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Re: Help with Measurement converter

 
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  #3
Nov 25th, 2008
The mistake is that you are using integers (the set 0,1,2,3 and -1 etc)
to represent floating point number.
int a=2*1.2; gives sets a to 2.

write
c++ Syntax (Toggle Plain Text) 
  1. double Meters;
  2. double Yards;
instead of the two int declarations.
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Re: Help with Measurement converter

 
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  #4
Nov 25th, 2008
Thanks for the help niek_e and StuXYZ it works perfectly now and i cant believe i forgot to put using before namespace.
Last edited by XxAaronxX; Nov 25th, 2008 at 6:51 am.
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Re: Help with Measurement converter

 
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  #5
Nov 26th, 2008
Hey I Use Visual 2008 C++ Express and i don't know how to link this code to a GUI so that when i type the number of meters into a text box and press a button it will return the answer in a second text box. If you know of a tutorial on GUI's i could use it would be great.

Thanks
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Re: Help with Measurement converter

 
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  #6
Nov 26th, 2008
Hey I have decided that a GUI is to Advanced for me to try at the moment and am going to keep reading my book.
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