Some problems in C++

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    • #2175
      YvetteHawthorne
      Participant

      I started C++ two days ago and need your help

      why its not work properly? Please help.

    • #3506
      GWILouisaxwzkla
      Participant

      The first function “read” looks ok to output the file data one word per line ,except I would probably pass the user’s name as a parameter instead of a global variable :

      the second function for adding data to a file ( not sure why you used both fstream.h and stdio.h for file input / output in the same program ( ? ) ) seems to have some problems. First I would allocate an array of the proper size and use strcpy ( string.h ) to copy the data.

      Next , you should take read() and write() out of the conditional or the program will never end :

      thats what I see so far…..

    • #3507
      YvetteHawthorne
      Participant

      thanks for all but there is error

      `MAX_SIZE’ undeclared (first use this function)

    • #3508
      YvetteHawthorne
      Participant

      thanks for all but there is error

      `MAX_SIZE’ undeclared (first use this function)

    • #3509
      YvetteHawthorne
      Participant

      i defined MAX_SIZE and this problem solved but now it shows me

      invalid conversion from char’ to const char*’
      initializing argument 2 of `char* strcpy(char*, const char*)’

    • #3510
      YvetteHawthorne
      Participant

      if ( sendtext )
      {
      FILE * pFile;
      char yazi[] = {sendtext , ‘n’};
      pFile = fopen ( “msngr.txt” , “a+” );
      fwrite (yazi , 1 , sizeof(yazi) , pFile );
      fclose (pFile);
      read(); //take these out!
      write();
      }

      if i take this out my new text will not appear

    • #3511
      GWILouisaxwzkla
      Participant

      for the write function I would do something like ( I don’t think I would have the console prompt inside the function , but if this is what you want ):

    • #3512
      YvetteHawthorne
      Participant

      thanks it works ok.
      now code is

      but there is some problems too.
      when i enter username it writes only first the letter of the username and all other letters understands as answer to the confirmation and writes

      You autorised as:N
      do you want to input data to file ( y or n )
      bad choice!
      do you want to input data to file ( y or n )
      bad choice!
      do you want to input data to file ( y or n )

      and when it shows the data of the file it puts n after all words and when i write “something is wrong”
      it shows
      something
      is
      wrong
      but in file everything is ok

    • #3513
      GWILouisaxwzkla
      Participant

      This seems to work:

    • #3514
      YvetteHawthorne
      Participant

      Oh thanks it works well.

      but can you explain what “cin.get()” means??
      and what it used for?

      and now i have to think how to remove confirmation

    • #3515
      YvetteHawthorne
      Participant

      ups problem. problem with read not solved it shows each word in new line

    • #3516
      GWILouisaxwzkla
      Participant

      cin.get() is a member function that gets the next character from the input stream:

    • #3517
      YvetteHawthorne
      Participant

      thanks.and what about read() function ??

    • #3518
      GWILouisaxwzkla
      Participant

      I think read() is for arrays. Check out this link on the topic: http://www.cplusplus.com/reference/iostream/istream/read.html

    • #3519
      YvetteHawthorne
      Participant

      Hi. I have a new problem now.

      I am using C++ builder 2009 and i cannot make “tmaskedit” to show characters as “*” like in web

      Can anyone help me?

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