Question

Open read a text file “7NoInputFileResponse.txt” that contains a message “There were no arguments on the command line to be tested for file open.”

Append to the program to output to the text log file a new line starting with day time date followed by the message "SUCCESSFUL".

Append that message to a file “7Error_Log_File.txt” . ?newline

Remember to be using fprintf using stderr using return using exit statements. Test for file existence, test 7NoInputFileResponse.txt file not null (if null use alternate text string “99 error unknown ” from within the program), existence of 7Error_Log_File.txt otherwise display such message using fprintf stderr and exit.

This is what I have down so far, but I'm not sure how to put in day, time, date following "SUCCESSFUL"

#include <stdio.h>

#include <stdlib.h>

void filecopy(FILE *ifp, FILE *ofp)
{
   int c;
   while ((c = getc(ifp)) != EOF)
   putc(c, ofp);

}

   int main(int argc, char *argv[])

{

   FILE *fp;
   void filecopy(FILE *, FILE *);
   char *prog = argv[0];
   if (argc == 1)

{
   FILE *infile = fopen("7NoInputFileResponse.txt", "r");
   char error_message[100] = "99 error unknown";
   FILE *outfile = fopen("7Error_Log_File.txt", "a");
   if (infile == NULL)

{

   if (outfile != NULL)

{

   fprintf(outfile, error_message);
   fprintf(outfile, "\n");
   exit(0);

}

}
   if (outfile == NULL)

{

   fprintf(stderr, error_message);
   exit(0);

}

   filecopy(infile, outfile);
   fprintf(outfile, "\n");
   fclose(infile);
   fclose(outfile);

}

   else
   while (--argc > 0)
   if ((fp = fopen(*++argv, "r")) == NULL)

{

   fprintf(stderr, "%s: can not open %s\n", prog, *argv);
   exit(1);

}

else

{

   filecopy(fp, stdout);
   fclose(fp);

}

   if (ferror(stdout))

{

   fprintf(stderr, "%s: error writing stdout\n", prog);
   exit(2);

}

   exit(0);
}

Please screenshot results.

Answer 1

//Main.c

#pragma once

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

void filecopy(FILE *ifp, FILE *ofp)
{
   int c;
   while ((c = getc(ifp)) != EOF)
       putc(c, ofp);
}

char* getDay(int d)
{
   switch (d)
   {
   case 0: return "Sunday ";
           break;
   case 1: return "Monday ";
           break;
   case 2: return "Tuesday ";
           break;
   case 3: return "Wednesday ";
           break;
   case 4: return "Thursday ";
           break;
   case 5: return "Friday ";
           break;
   case 6: return "Saturday ";
           break;
   default:
       break;
   }
}

int main(int argc, char *argv[])
{
   FILE *fp;
   void filecopy(FILE *, FILE *);
   char *prog = argv[0];
   if (argc == 1)
   {
       FILE *infile = fopen("C:\\hanu\\7NoInputFileResponse.txt", "r");
       char error_message[100] = "99 error unknown";
       FILE *outfile = fopen("C:\\hanu\\7Error_Log_File.txt", "a");
       if (infile == NULL)
       {
           if (outfile != NULL)
           {
               fprintf(outfile, error_message);
               fprintf(outfile, "\n");
               exit(0);
           }
       }
       if (outfile == NULL)
       {
           fprintf(stderr, error_message);
           exit(0);
       }

       filecopy(infile, outfile);
       fprintf(outfile, "\n");
       time_t t = time(NULL);
       struct tm tm = *localtime(&t);
      
       fprintf(outfile, getDay(tm.tm_wday));
       fprintf(outfile, "%d-%d-%d %d:%d:%d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
       fprintf(outfile, " SUCCESSFUL");
      
       fclose(infile);
       fclose(outfile);
   }

   else
       while (--argc > 0)
           if ((fp = fopen(*++argv, "r")) == NULL)
           {
               fprintf(stderr, "%s: can not open %s\n", prog, *argv);
               exit(1);
           }
           else
           {
               filecopy(fp, stdout);
               fclose(fp);
           }

   if (ferror(stdout))
   {
       fprintf(stderr, "%s: error writing stdout\n", prog);
       exit(2);
   }
  
   exit(0);
  
}

//output