2 Attachment(s)
Trouble with getc ( ) - File I/O
Hi,
Please review the C program below and see if you can figure out what's wrong. I've been trying for a day now and I Just can't seem to get it to work.
The aim of the program is to copy the contents of one file (in.txt) to another (out.txt) using a 256B buffer.
if in.txt contains 4 Chars (eg.ABCD) then out.txt will contain these chars followed by the char 'ÿ' then 252 null characters.
Attachment 11703Attachment 11704
Been cracking my head trying to figure this one out.
Code:
#include <stdio.h>
#include <stdlib.h>
#define SOURCE "c:\\dev\\in.txt"
#define DEST "c:\\dev\\out.txt"
#define BUFF_SIZE 256
signed int buffer[BUFF_SIZE];
int
main (int argc, char *argv[]){
FILE *in, *out;
signed int pos, ch;
if((in = fopen(SOURCE, "r")) == NULL){
fprintf(stderr, "Error: Could not open source file\n");
exit(1);
}
if((out = fopen(DEST, "w")) == NULL){
fprintf(stderr, "Error: Could not open destination file\n");
exit(1);
}
while(!feof(in)){
pos = 0;
while (((buffer[pos] = getc(in)) != EOF) && (pos < BUFF_SIZE)){
pos++;
}
pos = 0;
while (((ch = putc(buffer[pos], out)) != EOF) && (pos < BUFF_SIZE)){
pos++;
}
}
if (fclose(in) == EOF){
fprintf(stderr, "Error: Failed to close input file");
}
if (fclose(out) == EOF){
fprintf(stderr, "Error: Failed to close output file");
}
return 0;
}
