infinite loop problem

wondering if anyone could help, i have a program that is supposed to take in characters from a text file and store them in a two demensional array so that i can store them as words. i use a while loop using the isalnum function to store them. this while loop using the isalnum function seems to be where the infinite loop occurs. anyways, heres the code......can anyone see why this is happening?

Code:

#include <iostream>
#include <fstream>
#include <stddef.h>
#include <stdlib.h>
#include <ctype.h>
#include <string>

using namespace std;

class search
{
public:
    bool check();  //declare the function check
    void output(); //declare the function output
    void input(search sight, char *file);
	void input2(search sight, char *file);
    
private:
    int total;//variable for total number of strings
	int total2;//variable for number of characters in temp array
	int i;//variable for number of strings in array
	int j;//variable for number of characters in a string
	int m;//variable for number of characters in temp string
	int n;//variable for the insert loop
	int s;//variable for ?
	int a;
    ifstream in_stream; //create an instream
	ofstream out_stream;//creat an outstream
	char array[1000][30];//create an array
	char temp[1000][30];//create an array
	char system[3000][30];
	char next;//variable for next character in
    
	
};

void main()
{
	char *name = "text1.txt";
    search sight1;
    sight1.input(sight1, name);

}

void search::input(search sight, char *file)
{
s = 0;
m = 0;
total2 = 0;
total = 0;
i = 0;
j = 0;
in_stream.open(file);
in_stream.get(next);
while(! in_stream.eof())//while next is not end of file
{
     //invariant: next is not the end of the file and next is a part of the file
	
		if(ispunct(next))
			in_stream.get(next);
		if(isspace(next))//if next is space
		{
			in_stream.get(next);//get next character from file
			array[i][j] = '\0';//put null to end current string
		    j = 0;//bring number of characters back to zero
			i++;//start a new string
			total++;//add one to total number of strings
		}
		else//if next is not a space
		{
			while(isalnum(next))
			{
			    in_stream.get(next);
				cout << next;
}       }   }
}

Read this then edit your post accordingly

ok fixed it......can anyone help now? i narrowed it down to my header declerations. if i change "include# fstream to include fstream.h it works but i need the fstream for other things in my program.

You code as it was wouldn't compile for me. I removed the first parameter from the input() function, making it:
>>void input(char *file);
and changed the call accordingly:
>>sight1.input(name);

Now it compiles for me. But...

>>in_stream.open(file);
You didn't check that this worked. You must make sure the file is actually open before using it.

>>while (!in_stream.eof())
Read this

Fix these and see how you go. I expect your loop is caused the file open failing though.