#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[] )
{
   FILE *fp;
   int i, c;

   if ( argc < 2 )
   {
      printf("Usage: %s filename\n\n", argv[0]);
      exit(1);
   }

   if ( (fp = fopen(argv[1], "r")) == NULL )
   {
      printf("Error: can't open file %s\n\n", argv[1]);
      exit(1);
   }

   printf("Content of file %s in ASCII code (decimal):\n\n", argv[1]);

   i = 1;
   while ( (c = fgetc( fp )) != EOF )
   {
      printf("%3d ", c);
      if ( i%10 == 0 )
         putchar('\n');
      i++;
   }  
   putchar('\n');
   putchar('\n');
}