Thread: what condition in the while loop?

i need the main body of this to execute, i figured a while loop but i have no idea what would go inside, i've never dealt with inputting files before. if i just run it without the while loop everything comes back as 0, obviously. i don't know what possible condition to use to make this run correctly.

Code:

#include <iomanip>
#include <iostream>
#include <fstream>
#include <ctype.h>

using namespace std;



bool myIsAlpha(char ch)
{
if((ch > 64 and ch < 91) or (ch > 96 and ch < 123))
return true;
else
return false;
}


bool myIsDigit( char ch )
{
if (ch > 47 and ch < 58)
return true;
else
return false;
}


bool myIsUpper( char ch )
{
if (ch < 64 and ch > 91)
return true;
else
return false;
}
bool myIsAlpha( char ch );
bool myIsDigit( char ch );
bool myIsUpper( char ch );
int countPunct = 0,
countAlpha = 0,
countUpper = 0,
countLower = 0,
countChar = 0,
countDigit = 0,
countSpace = 0,
countWhite = 0;
char ch; 

int main()
{
ifstream inputFile;



inputFile.open( "input.txt" );
if( inputFile.fail() )
{
cout << "input.txt failed to open";
exit( -1 );
}

while ()
{
if(ispunct(ch))
{
countPunct++;
}

if(myIsAlpha(ch))
{
countAlpha++;
}

if (myIsDigit(ch))
{
countDigit++;
}
if (myIsUpper(ch))
{
countUpper++;
}
if (islower(ch))
{
countLower++;
}
if (isspace(ch))
{
countWhite++;
}
}


//Close the input file

inputFile.close();

cout<<"\n"<<countPunct<<"\n"<<countAlpha<<"\n"<<countDigit<<"\n"<<countUpper;
return 0;
}