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  #1  
Old 22-Mar-2004, 11:32
soccer022483 soccer022483 is offline
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How do you compare two strings? [was: Easy Question I'm sure]

How do you compare two strings??

I.E.
CPP / C++ / C Code:
string a = "Hey";
string b = "Hey";

if( a == b )
  cout << "a is equal to b" << endl;
well it's not cout-ing anything!

Please help

Austin
Last edited by JdS : 22-Mar-2004 at 16:16. Reason: Please enclose c code in [c] & [/c] for syntax highlighting
  #2  
Old 22-Mar-2004, 11:39
davekw7x davekw7x is offline
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Quote:
Originally Posted by soccer022483
How do you compare two strings??

I.E.
CPP / C++ / C Code:
string a = "Hey";
string b = "Hey";

if( a == b )
  cout << "a is equal to b" << endl;
well it's not cout-ing anything!

Please help

Austin


Here's a complete program that works for me (Borland bcc, Microsoft VC++, GNU g++ compilers). What are you using?

CPP / C++ / C Code:
#include <iostream>
#include <string>

using namespace std;

int main()
{

  string a = "Hey";
  string b = "Hey";

  if( a == b )
    cout << "a is equal to b" << endl;
  else
    cout << " a is not equal to b" << endl;
  return 0;
}

Dave
  #3  
Old 22-Mar-2004, 11:48
soccer022483 soccer022483 is offline
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Quote:
Originally Posted by davekw7x
Here's a complete program that works for me (Borland bcc, Microsoft VC++, GNU g++ compilers). What are you using?

CPP / C++ / C Code:
#include <iostream>
#include <string>

using namespace std;

int main()
{

  string a = "Hey";
  string b = "Hey";

  if( a == b )
    cout << "a is equal to b" << endl;
  else
    cout << " a is not equal to b" << endl;
  return 0;
}

Dave

Ok I just copyed exactly that and it printed "a is not equal to b"
Did you compile and run yours?
I'm using microsoft visual C++

Austin
  #4  
Old 22-Mar-2004, 12:01
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aaroncohn aaroncohn is offline
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Dave's example works just fine for me, too. The problem you're having is probably unrelated to the equality of the strings. Check your syntax to make sure everything is right.
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  #5  
Old 22-Mar-2004, 12:18
machinated machinated is offline
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I just ran the same code in my msvc++ 6.0 and it works fine. try initializing the strings using constructors: string a("Hey"); string b("Hey");

Quote:
Originally Posted by aaroncohn
Dave's example works just fine for me, too. The problem you're having is probably unrelated to the equality of the strings. Check your syntax to make sure everything is right.
  #6  
Old 22-Mar-2004, 12:48
davekw7x davekw7x is offline
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Quote:
Originally Posted by soccer022483
Ok I just copyed exactly that and it printed "a is not equal to b"
Did you compile and run yours?
I'm using microsoft visual C++

Austin

I compiled the program (named st.cpp) and ran with the following command-line compilers:

Borland bcc (C++ version 5.5.1)

GNU g++ (GCC 3.3.1 cygwin)

Microsoft cl (Visual c++ version 6.0)

All said:
Quote:
a is equal to b

Dave
  #7  
Old 22-Mar-2004, 12:52
davekw7x davekw7x is offline
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Quote:
Originally Posted by soccer022483
Ok I just copyed exactly that and it printed "a is not equal to b"
Did you compile and run yours?
I'm using microsoft visual C++

Austin

I just did a copy-and-paste from this post to see if anything got lost in file upload/download.

Still works as advertised.

Dave
Last edited by davekw7x : 22-Mar-2004 at 13:35.
  #8  
Old 22-Mar-2004, 15:13
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aaroncohn aaroncohn is offline
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Quote:
Originally Posted by soccer022483
Ok I just copyed exactly that and it printed "a is not equal to b"
Did you compile and run yours?
I'm using microsoft visual C++

Austin
There must be something wrong with your compiler or your process of compiling the file. Are you getting any warnings when you compile the program?
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  #9  
Old 22-Mar-2004, 15:15
soccer022483 soccer022483 is offline
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got it!

Ok I got it finally. I don't really know what the problem is, but I went to a different computer and used identical code and it worked. So something was wrong with that computer or something. Thanks for the help guys.

Austin
  #10  
Old 22-Mar-2004, 15:45
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Quote:
Originally Posted by soccer022483
Ok I got it finally. I don't really know what the problem is, but I went to a different computer and used identical code and it worked. So something was wrong with that computer or something. Thanks for the help guys.

Austin
Glad to hear it. Keep up the learning!
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