Quote:
Originally Posted by ramkrix
Thanks for your reply shamrock..
Is tis the way, I need to include the condition in while loop:
while(feof(stream)==0)
One more question to you: instead of using command line args and C library fns can we check this by having the program absolute system calls..
Thanks in advance,
Ramkrix
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You can use "absolute system calls" instead of standard C library routines like fopen() and you can avoid passing the input filename as a command line argument at the expense of hardcoding the input filename in the open() system call.
The system call approach is better for reading 5 bytes at a time from the input file and printing the fifth byte to standard output. This method is preferred over incrementing a counter and repeatedly testing if x < 5 or checking for EOF using the feof() standard lib function.
Code:
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
main(int argc, char *argv[])
{
int fd;
char name[5];
fd = open("/path/to/input/file", O_RDONLY);
while (read(fd, (void *) name, (size_t) 5) == 5)
printf("the fifth byte is %c\n", name[4]);
}
