changing output with fprintf

[hinman]

I have an input file that contains lines

word1 word2 word3 45 78 90
word3 word4 word5 45 80 100

My program read its lines and displays them in another file using:

 fprintf(inptr2, "%s", buffer);

So far the lines in the output file are exactly the same, but I want to change te contents of that written line, I would like to change all the letters to all upper case and diplay the average of the 2 last numbers.

to obtain something like this in the new file:

WORD1 WORD2 WORD3 90

any ideas ?

Thanks

[MacGyver]

For each word, for each letter, put it to uppercase. For the last two numbers, add them together and then divide by 2.

Ask a specific question to receive a specific answer.

[hinman]

For each word, for each letter, put it to uppercase. For the last two numbers, add them together and then divide by 2.

Ask a specific question to receive a specific answer.

all right thanks for your help (the keyword was to uppercase)

I made a for loop such as follow:

for (i=1; i < sizeof buffer; i++)
{
     buffer[i] = toupper(buffer[i]);
}

it worked just fine.

But for what to do to make an average of the last two numbers of each line ?

(number 1 + number 2 ) / 2;

for exemple the last two numbers of the first line "78" and "90", I want to add them up and average them and show the results in the output file... I want to do it in such a way it would work for all other lines ...

Is there anyway to "designate" those two numbers to program in order to make the calculations ?

[whiteflags]

Um, you could store the numbers as well as the words in variables using your sscanf statement. sscanf works like the other members of the *scanf family, but the input is from a string.

[hinman]

any coding example, or tutorial would be welcome.

[Dave_Sinkula]

This may be of interest.

You could use sprintf instead of printf for each text field. If you have an index less than 4, you could fprintf to the output file. For higher indexes you then could convert the incoming text to a number and add it to the current sum. Then, when the for loop completes, you fprintf the sum.

That and other tweaks could produce this:

word1 word2 word3 45 168
word3 word4 word5 45 180

Adding the uppercase-ing of the text is not that difficult.

[edit]The averaging is not that difficult, and a final output of the following follows from making incremental changes.

WORD1 WORD2 WORD3 45 84
WORD3 WORD4 WORD5 45 90

This code is even extensible to take more than 2 values for averaging.


But is important that you know what you are doing, so don't just copy-and-paste. Post questions along the way about stuff there that you don't understand, and post questions along the way about making the modifications.

[hinman]

I am having hard time testing this function, can you please show me how to use the sprintf and make the average ?

here's my code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define   FILENAME   "input.dat"

void FileProcess(void);

int main ( void )
#include <string.h>
#define   FILENAME   "input.dat"

void FileProcess(void);

int main ( void )
{
char fname [21];

printf("Enter file name: ");
scanf("&#37;s", fname);

if (strcmp ( fname, FILENAME ))
{
   printf("Unable to open file specified!\n");}

   else
   {
        FileProcess();
    }

}

void FileProcess (void)
{
      FILE * fp, * inptr, * inptr2;

      char buffer [81];
      int i, count=1;
      int count2=1;
      int x;

      fp = fopen ( FILENAME, "r" );
      inptr = fopen ( "east.dat", "w");
      inptr2 = fopen ( "west.dat", "w");
      x = 1;

     while ( fgets( buffer, sizeof buffer, fp ) != NULL )
     {
           fputs( buffer, stdout );

           for ( i = 0; i < sizeof buffer; i++)
           {
                buffer[i] = toupper(buffer[i]);
           }

           if (x==1)
          {
             x = 0;
             fprintf(inptr, "Roster#%i - %s", count++, buffer);
           }

           else
           {
               x=1;
               fprintf(inptr2, "Roster#%i - %s", count2++, buffer);}
           }

                fgets(buffer, 81, fp);
   fclose(fp);
   fclose(inptr);
   fclose(inptr2);
}

[richfatsanta]

Maybe you could try and deal with the file one line at a time? Then approach your two tasks (uppercasing and averaging) separately.

while not end of file
{
   get 3 words and 3 numbers
   uppercase each letter
   find average of numbers
}