/*======================================================================
   Program 	: upper_case.c
   Author		: www.vijaynetwork.com
   Description  : Function to convert Lower Case String to Upper Case String.   
=======================================================================*/

/* File includes */
#include <stdio.h>
#include <conio.h>

/* Defines */
#define DIFF_UPPER_CHAR 	32
#define CHAR_Z          			90

/* Function Declaration */
void todo_upper( char *t );

/*
 * main function
*/
int main( void )
{    
   char test[ ] = "I like trees because they seem more resigned to the way they have to live than other things do.";

   printf( "Enter String to make Upper Case\n" );
   gets( test );
   
   todo_upper( test );
   printf( "%s\n", test );
   
   printf( "\t--www.vijaynetwork.com\n", test );
   getch( );
}

/*
 * Function Name: todo_upper
 * Arguments: takes char * as argumet. It returns nothing.
 * Description: Converts string characters to Upper Case.
*/
void todo_upper( char *t )
{
   int i;
   
   for( i = 0; i < strlen( t ); ++i )
   {
    	 if( t[ i ] != DIFF_UPPER_CHAR && t[ i ] > CHAR_Z )
      {
      	t[ i ] = ( t[ i ] - DIFF_UPPER_CHAR );
      }		
   }
}