Write some text to a file

**Unlimited4s** · 07-16-2002

I'm a complete n00b but how do you write some text to a file?
I wanna make a small program that writes a string and then read it.
How do i start?

Akilla · 07-16-2002

Here's how to write to a text file

Code:

#include <stdio.h>
#include <conio.h>

main()
{
    
    FILE *fp;
    char ch, filename[40], mode[4];

    while(1)
    {
	    printf("Enter a filename: ");
	    gets(filename);
	    printf("\nEnter a mode (max. 3 characters): ");
	    gets(mode);
	    fp = fopen(filename, mode);
		    if ( fp != NULL)
		    {
		          printf("\nSuccessful opening %s in mode %s.\n", filename, mode);
                                          fprintf(fp, "This will be written in the text file because it is under fprintf. The rest of the code is just to let you know how this works\n"); 
		          fclose(fp);

		          puts("Enter 'x' to exit, any other to continue.");
		          if ( (ch = getch() ) == 'x')
                  {
				       break;
                  }
                  else
                  {
                      continue;
                  }
           }
           else
           {
                printf(stderr, "\nError opening file %s in mode %s.\n", filename, mode);
                puts("Enter 'x' to exit, any other to try again.");
                
                if ( (ch = getch()) == 'x')
                {
                     break;
                }
                else
                {
                     continue;
                }
           }
    
    }    
        getchar();
        getchar();

}

Run the above code and see what's being stored in the file
and why. If you observe the code carefully, you'll also see the syntax of fprintf. Apart from that, you can also learn a little bit about getch() and how that works.

Good Luck!

COOL PROGRAMS @ www.akilla.tk

**Unlimited4s** · 07-16-2002

Sorry it doesn't save a file...
And what's that mode-stuff?

**hk_mp5kpdw** · 07-16-2002

This will probably look a little easier to you:

Code:

#include <fstream>

using std::ofstream;
using std::endl;

int main()
{
    ofstream output("FileName.Txt");
    output << "This text data will show up in the file!" << endl;
    return 0;
}

**Unlimited4s** · 07-16-2002

It works !! thanks man!!
But how do you load that file again in the program so it is viewable within the program?

**hk_mp5kpdw** · 07-16-2002

For reading the data back into the program, something similar to this can be implemented (there are dozens of ways to do this):

Code:

#include <fstream>
#include <iostream>
#include <string>

using std::ifstream;
using std::cout;
using std::endl;
using std::string;

int main()
{
    ifstream input("FileName.Txt");
    string word;

    // Test to make sure the file is open, exit program if not open.

    if( !input.is_open() ) return 1;

    // File is open, read words in file one at a time and output to screen.

    input >> word;              // Get first word
    while( input )
    {
        cout << word << ' ';    // Output words separated by spaces
        input >> word;          // Get next word
    }
    cout << word << endl;       // Output last word from file to screen

    return 0;
}

Tested it using the file output by the first program and it works fine using my machine!

**onurak** · 07-16-2002

you can open the tutorial at cprogramming.com here

**civix** · 07-17-2002

Tryt looking at the tutorial at gametutorials.com...

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