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String Programs

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File Programs

Read write in 2 files Add,edit,delete,search in file Add,search using structure Append in file Merge file Count word,line,char in file Count record - struct fread() example fwrite() example fopen() example fclose() example fscanf() and fprintf() fseek() example Error handling in file op Find odd,even num Odd even numbers in file Max, min age in class Random numbers file Preprocessor in 2 files Encode decode in file

Bios Programming

biosequip( ) - sys confi biosdisk( ) - partition tbl info Pc type-bios data area File allocation table Telephone directory

TSR Programming

Interchange letters Interchange letters on screen Unload TSR on key press-keyboard Unload TSR - timer interrupt Activate, deactivate TSR Print alphabet from printer Repeat key press Keep caps on Make ctrl, alt key pressed

Interrupt Programming

Restart computer Conventional memory of sys Save IVT in file Print string-interrupt 21h Read char-interrupt 21h Read char with echo-interrupt 21h Delete file-interrupt 21h Delete directory-interrupt 21h Get set system date Show system configuration Search, delete file in dir Display multiple file in dir

Mouse Programming

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#include <stdio.h>
#include <conio.h>
#include \"valid.c\"

struct emp_detail
{  int emp_no;
   char emp_name[10];
   int emp_age;
};

 void getWriteFileName(char *str);
 void getReadFileName(char *str);
 void enterData();
 void getTotalCount();
 void getName(char *);

 FILE *fp;
 int flag=1;
 int count=0;
 char filename[14];
 struct emp_detail emp_cur;

 void main()
 {
    char option;
    clrscr();
    printf(\"\\nDo you want to create the data file type \'y\' for yes and \'n\' for no.\");
    scanf(\"%c\", &option);
    fflush(NULL);

      if( option == \'y\' || option == \'Y\')
       getWriteFileName(filename);
      else if( option == \'n\' || option == \'N\')
       {   getReadFileName(filename);
       getTotalCount();
       }

    getch();
 }

 void enterData()
 {
    printf(\"\\nEnter data .....\");
    while(flag)
    {
    //printf(\"\\nEnter employee no. : \");
    //scanf(\"%d\", &emp_cur.emp_no);
    getPosInteger(\"Enter employee no. : \", &emp_cur.emp_no);
    fflush(NULL);

    printf(\"\\nEnter employee name : \");
       //scanf(\"%[^\\n]\", emp_cur.emp_name);
    getName(emp_cur.emp_name);
    fflush(NULL);

    //printf(\"\\nEnter employee age : \");
    //scanf(\"%d\", &emp_cur.emp_age);
    getPosInteger(\"Enter employee age : \", &emp_cur.emp_age);
    fflush(NULL);

    fprintf(fp,\"%d %-10s %d\", emp_cur.emp_no, emp_cur.emp_name, emp_cur.emp_age);

    if( flag > 0 )
       fprintf(fp,\"\\n\");

    flag++;

    if(emp_cur.emp_no != 9999)
    {   printf(\"\\nEnter 1 to continue and 0 to exit.\");
        scanf(\"%d\", &flag);
        fflush(NULL);
    }
    else flag=0;
    count++;
    }

    fclose(fp);
    printf(\"\\nTotal number of employee record entered is : %d\", count);
 }

    void getName(char *str)
    {
    int count=0;
    char *getstr;
    char readch=\'\\0\';
    int errorflag = 0;

       fflush(NULL);
       getstr = str;

       while(1)
       {
        scanf(\"%c\", &readch);
        if( readch == \'\\n\')
           break;
        if( isalpha(readch) == 0)
        {   printf(\"\\nInvalid entry. Enter characters only.\\nEnter name again :\");
            errorflag = 1;
            break;
        }
        else
            *getstr = readch;

        count++;
        getstr++;
        if( count >= 10 )
          break;
       }

       if(errorflag)
          getName(emp_cur.emp_name);

      // *getstr=\'\\0\';
    }

   void getWriteFileName(char *str)
   {
     printf(\"Enter Output File name maxium 14 character : \");
     scanf(\"%s\", str);

     if( ( fp = fopen(str, \"wt\") ) == NULL  )
     {  fclose(fp);
    printf(\"\\nInvalid file name entered.\");
     }
     else
    enterData();
  }

   void getReadFileName(char *str)
   {
     printf(\"Enter Input File name maxium 14 character : \");
     scanf(\"%s\", str);

     if( ( fp = fopen(str, \"r+t\") ) == NULL  )
     {  fclose(fp);
    printf(\"\\nInvalid file name entered.\");
     }
   }

    void getTotalCount()
    {  flag =0;
       while( feof(fp) == 0 )
       {
      fscanf(fp, \"%d %10s %4d\", &emp_cur.emp_name, emp_cur.emp_name, &emp_cur.emp_age);
      flag++;
       }
      fclose(fp);
      printf(\"\\nTotal number of employee record entered is : %d\", flag);

    }

    /**************************** Input/Output ********************************/


    Do you want to create the data file type \'y\' for yes and \'n\' for no.y
    Enter Output File name maxium 14 character : output.txt

    Enter data .....
    Enter employee no. : 1

    Enter employee name : chintan

    Enter employee age : 26

    Enter 1 to continue and 0 to exit.1

    Enter employee no. : 9999

    Enter employee name : nilay

    Enter employee age : 29

    Total number of employee record entered is : 2

    /*******************************  **********************************/

 
 
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