Thread: Opening File Changing Case and Closing HW Help Code Included.

Thanks again ahead of time.

I am looking to write a program that opens a text file, takes the text and converts all characters (excluding special and numbers) to capital letters.

I am unsure where I am going wrong for some reason I am using d, and cannot get it to code correctly keep getting char to char error. Please let me know what I have messed up as I am a little confused.

Code:

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

#define MAXCHAR 250
int main(void)
{
   FILE *fp;
   char filename[MAXCHAR];
   char d;
  
   printf("Enter the name of the file to open\n");
   fgets(filename, MAXCHAR, stdin);
   filename[strlen(filename) - 1] = '\0';

   if  (!(fp = fopen(filename, "r+")))
   {
      printf("Unable to open %s\n", filename);
      exit(EXIT_FAILURE);
   }

  else
  {
       fgets(d,MAXCHAR,fp);
        if (fp > 'a' && fp < 'z')
        {
          fp = tolower(fp);
        }
        fputs(fp);
        }

   system("Pause");
   return 0;

}

Is this any better?

I am still getting an error at my if statement. I was unfortunately given the worst textbook on earth which provide no examples which relate anything to our assignments both graded and practice.

I am having to read wikipedia and here to learn to program in small segments.

i appreciate the help. I am just somewhat lost on this topic i guess the concept of counting within a file is confusing the heck out of me.

any examples would be great.

Code:

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

#define MAXCHAR 250
int main(void)
{
   FILE *fp;
   char filename[MAXCHAR];
   char d;
  
   printf("Enter the name of the file to open\n");
   fgets(filename, MAXCHAR, stdin);
   filename[strlen(filename) - 1] = '\0';

   if  (!(fp = fopen(filename, "r+")))
   {
      printf("Unable to open %s\n", filename);
      exit(EXIT_FAILURE);
   }

  else
  {
       fgets(d,MAXCHAR,filename);
        if (d > 'a' && d< 'z')
        {
          d = tolower(d);
        }
        }

   system("Pause");
   return 0;

}

yes i was being dumb with that.

I program in the AML language for robotics and doing that at work all day and trying to switch to C for school sucks.

Luckily this assignment isn't graded but i still need to complete tonight

I am hoping i can get it done we shal see.

okay here is an update

i guess my loop writing is very week.

Code:

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

#define MAXCHAR 250
int main(void)
{
   int c; /* for return value of fgetc */
   int inword = 0;
   FILE *fp;
   char filename[MAXCHAR];
   unsigned int count = 0;

   printf("Enter the name of the file to open\n");
   fgets(filename, MAXCHAR, stdin);
   filename[strlen(filename) - 1] = '\0';

   if  (!(fp = fopen(filename, "r")))
   {
      printf("Unable to open %s\n", filename);
      exit(EXIT_FAILURE);
   }

   while((c = fgetc(fp)) != EOF)
   {
      if(islower((unsigned char)c))
      {
         toupper(c);
      }
      }
   fclose(fp);

   printf("The file has been converted to all Capital letters.\n\n\n");
   system("Pause");
   return 0;

}

let me know what i am missing. I am hoping I got it to atleast open the file and close it. I am just having a problem scanning through and changing. maybe i am missing something small let me know.

here is an update I am at least writing to file now. except my output is MAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA and so on.

Code:

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

#define MAXCHAR 250
int main(void)
{
   int c; /* for return value of fgetc */
   FILE *fp, *fp2;
   char filename[MAXCHAR];
   
   printf("Enter the name of the file to open\n");
   fgets(filename, MAXCHAR, stdin);
   
   filename[strlen(filename) - 1] = '\0';
   fopen(filename,"r+");
   

   if  (!(fp = fopen(filename, "r+")))
   {
      printf("Unable to open %s\n", filename);
      exit(EXIT_FAILURE);
   }

   while((c = fgetc(fp)) != EOF)
   {
      c=toupper(c);
      fseek(fp,-1L,SEEK_SET);
      fputc(c,fp);
      }
      fclose(fp);    

   printf("\n\nThe file has been converted to all Capital letters.\n\n\n");
   system("Pause");
   return 0;

}