Adds line numbers

/*
 
     fileex1.c
 
 
 
     Input a text file a line at a time and output the
 
     contents to the screen together with the line number.
 
 
 
*/
 
 
 
#include  <stdio.h>
 
#include  <stdlib.h>
 
 
 
FILE *fpin                            /* Define file pointer */
 
char file_name[13]                     
 
 
 
void  process_files(void)
 
{
 
  char buff[80]
 
  int line_count
 
 
 
  line_count=1
 
  while(fgets(buff,80,fpin)!=NULL)      /* Read in lines until EOF */
 
  {
 
    printf("%4d  %s",line_count++,buff)
 
  }
 
}                                       /* End process_files */
 
 
 
void open_files(void)
 
{
 
  printf("Enter filename : ")
 
  scanf("%s",file_name)
 
  if((fpin=fopen(file_name,"r"))==NULL) /* open file - with check */             
 
  {                                     /* Display error on fail  */
 
    printf("Cannot open file %s",file_name)
 
    exit(1)
 
  }
 
}                                       /* End open_files */
 
void main(void)
 
{
 
  open_files()
 
  process_files()
 
  fclose(fpin)
  return 1
 
}                                       /* End of main program */