Counting lines of code without the comments and blank lines

[Leibnitz]

********************************************************************************************
If you've ever wanted to count the lines of your code without the comments and blank lines ,here is a piece of code that
i have wrote that will help you do it.

#include <stdio.h>
#include <string.h>
#include <direct.h>
#include <windows.h>

// checks if a certain file or directory exist
bool fExist( char* filepath )
{
    WIN32_FIND_DATA file;
    HANDLE hFile;
    if (( hFile = FindFirstFile( filepath,&file ))  
         == INVALID_HANDLE_VALUE )
    {
          return false;
    }
    return true;
}

// determin if a line is a blank line
bool isblankline( char *buff )
{
	for( int i = 0; buff[i] != 0; i++ )
	{
		if( buff[i] - ' ' > 0 )
			return false;
	}

	return true;
}

// determin if a line is a commentary
bool iscommentary( char *buff )
{
	for( int i = 0; buff[i] != 0; i++ )
	{
		if(( buff[i] - '/' == 0 ) && ( buff[i+1] - '/' == 0 ) || 
			( buff[i+1] - '*' == 0 ))
		{
			buff[i] = 0;
		}
	}

	if( isblankline( buff ))
		return true;

	return false;
}


void main()
{
	FILE *file;
	char *filename;
	char *buff;
	int lines = 0;
	
	// allocating memory for 'filename' and 'buff'
	try
	{
	    filename = ( char* )malloc( sizeof(char) * 200 );
	    buff = ( char* )malloc( sizeof(char) * 200 );

		if(!filename)
			throw -1;

		if(!buff)
			throw -2;
	}

	catch( int excpt )
	{
		switch( excpt )
		{
		case -1: fprintf( stderr, &quot;can't allocate memory for \&quot;filename\&quot; .\n&quot;);
			break;

		case -2: fprintf( stderr, &quot;can't allocate memory for \&quot;buff\&quot; .\n&quot;);
			break;
		}

		exit(1);
	}
	
	strcpy( filename, &quot;place your file name here&quot; ); // filename

	// this part is not strictly necessary but i have included anyway
	// it checks if the file exist
	if( !fExist( filename ))
	{
		fprintf( stderr, &quot;incorrect filename.\n&quot;);
		exit(1);
	}

	file = fopen( filename, &quot;r&quot; );

	if(!file)
	{
		fprintf( stderr, &quot;error while opening %s.\n&quot;, filename );
		exit(1);
	}

	while( fgets( buff, 100, file ) != NULL )
	{
		if( !isblankline( buff ) && !iscommentary( buff ))
		{
			lines++;
			//printf(&quot;%s&quot;,buff); // display the code without the blank lines and commentaries
		}
	}

	printf(&quot;There are %d lines in the file \&quot;%s\&quot;.\n&quot;, lines, filename );

	free( filename );
	free( buff );
}