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Full Discussion: What am I doing wrong!!!
Top Forums Programming What am I doing wrong!!! Post 302203391 by fpmurphy on Sunday 8th of June 2008 11:50:58 AM
Old 06-08-2008
I have simplified your example to just print out the file so that the required change is more obvious:
Code:
#include <stdio.h>
#include <stdlib.h>

/* prototype */
int prompt(FILE **);

int
main(int argc, char *argv)
{
    int fcharin;
    FILE *in;

    prompt(&in);

    while ((fcharin = fgetc(in)) != EOF )
      fprintf(stdout, "%d\n", fcharin);

    return 0;
}


int
prompt(FILE **inp)
{
   char fileIn[256];

   printf("File to encrypt/decrypt?: ");
   scanf("%255s", fileIn);

   if ((*inp = fopen(fileIn, "rb")) == NULL ) {          
       printf("Error opening input file.\n");
       exit(1);
   }
}

 

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GETC(3S)																  GETC(3S)

NAME
getc, getchar, fgetc, getw - get character or word from stream SYNOPSIS
#include <stdio.h> int getc(stream) FILE *stream; int getchar() int fgetc(stream) FILE *stream; int getw(stream) FILE *stream; DESCRIPTION
Getc returns the next character from the named input stream. Getchar() is identical to getc(stdin). Fgetc behaves like getc, but is a genuine function, not a macro; it may be used to save object text. Getw returns the next int (a 32-bit integer on a VAX-11) from the named input stream. It returns the constant EOF upon end of file or error, but since that is a good integer value, feof and ferror(3S) should be used to check the success of getw. Getw assumes no special alignment in the file. SEE ALSO
clearerr(3S), fopen(3S), putc(3S), gets(3S), scanf(3S), fread(3S), ungetc(3S) DIAGNOSTICS
These functions return the integer constant EOF at end of file, upon read error, or if an attempt is made to read a file not opened by fopen. The end-of-file condition is remembered, even on a terminal, and all subsequent attempts to read will return EOF until the condi- tion is cleared with clearerr(3S). BUGS
Because it is implemented as a macro, getc treats a stream argument with side effects incorrectly. In particular, `getc(*f++);' doesn't work sensibly. 7th Edition May 14, 1986 GETC(3S)
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