Need help on writing file

[cheryl]

I have some problem regarding to my project. I need to create a program using C programming and in the program it will be able to create another new file to store all my data. My output will prompt the user to key in the information. After that the program will automatically create a new file which containes all the data input by the user. I having difficultly in writing to a file to store the data. Can you give me some idea to program it??
Thank you for your help!!!

[Salem]

If you know about

printf( "hello world\n" );

Realise that

fprintf( stdout, "hello world\n" );

is exactly the same thing.

Now that you know you can use files, try

FILE *fp = fopen( "out.txt", "w" );
fprintf( fp, "hello world\n" );
fclose( fp );

The rest is simply a matter of choosing what to print

[cheryl]

hi really thanks for your help.....i already can create a file using your method...but now i having difficulty in saving the data. I need to ask the user to key in the data.....after the user key in the data....i will ask the user whether he/she want to continue or not. If the user want to continue, i will use loop function to display the sentence to prompt the user to key in the data again...then i will ask again he/she wish to continue or not...if the answer is no.....then i will display all the data that the user key in in the file that i had created.....now i can program the loop function.....but the problem is i can't print out all the data....only the last data that the user key in is being display. Can you give me some example in order to program it??......Thanks~!!!

[Prelude]

All input is going to the same file, right? Just open and close the file outside of your loop:

FILE *out = fopen ( filename, "w" );
int done = 0;

while ( !done ) {
  char buffer[BUFSIZ];

  printf ( "Enter input: " );
  fflush ( stdout );

  if ( fgets ( buffer, sizeof buffer, stdin ) == NULL )
    break;

  fputs ( buffer, out );

  printf ( "Continue? (y/n): " );
  fflush ( stdout );

  if ( getchar() != 'y' )
    done = 1;
}

fclose ( out );