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how do I find out if it's upper case letter?

Posted on 2007-11-30
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Last Modified: 2010-04-01
#include <iostream>

using namespace std;

int main()
{
      string string1 = "Hh";
      
      cout << string1 << endl;
      
      if ( string1[0] == "H" )
      {
            cout << "is upper case " << endl;
      
      }
      return 0;
}
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Question by:Troudeloup
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6 Comments
 

Author Comment

by:Troudeloup
ID: 20386570
or rather


bool is_upper ( string[n] )
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 20386578
It is isupper() instead:

 if ( isupper( string1[0] ) )
      {
            cout << "is upper case " << endl;
     
      }


you have to include "stdlib.h" in your source file
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LVL 55

Expert Comment

by:Jaime Olivares
ID: 20386579
Complete example:
#include <iostream>
#include <stdlib.h>
 
using namespace std;
 
int main()
{
      string string1 = "Hh";
      
      cout << string1 << endl;
      
      if ( isupper(string1[0]) )
      {
            cout << "is upper case " << endl;
      }
      return 0;
}

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Author Comment

by:Troudeloup
ID: 20386581
#include <"stdlib.h">

?
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Accepted Solution

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Jaime Olivares earned 500 total points
ID: 20386585
no, just <stdlib.h>  or "stdlib.h"

it is require by the isupper() function to work properly
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Author Comment

by:Troudeloup
ID: 20386586
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