Pointer

A pointer is different. A pointer is a variable that points to another variable. This means that a pointer holds the memory address of another variable. Put another way, the pointer does not hold a value in the traditional sense; instead, it holds the address of another variable. A pointer "points to" that other variable by holding a copy of its address.
Because a pointer holds an address rather than a value, it has two parts. The pointer itself holds the address. That address points to a value. There is the pointer and the value pointed to. This fact can be a little confusing until you get comfortable with it, but once you get comfortable it becomes extremely powerful.
The following example code shows a typical pointer:

#include <stdio.h>

int main()
{
    int k,l;
    int *p;   /* a pointer to an integer */
    p = &k;
    *p=5;
    l=k;
    printf("%d %d %d\n", k, l, *p);
    return 0;
}

How To Create Protected Password In C Programing language

                    
                      Today We Discuss About How To Create Password With Protected Mode

This is very easy to learn from making a file which open with a protected password.  That is why I made a program both in Turbo C compiler as well as Dev C++ that enables a user to understand it and  input his desired string length password and string name then activates the program to count how many characters are there in the input.
  I am making this program with very interesting manner to add sum color like Red,Yellow and many more which look like very good design and layout . I am some more feature to make better the use the time for manage the loading time.

We all know that a string is a random inputs of different characters. Today, I'm about to show you how to count characters in a srtring input. This program is used with the string length statement which enables the program to count how many characters are there in a string. Check out the sample code below .

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                                        This is the Program of Turbo C Compiler
 
#include<fstream.h>
#include<iostream.h>
#include<string.h
#include<conio.h>
#include<stdio.h>
#include<time.h>
#include<dos.h>
 void display();
 void main()
 {
 char str[25],cstr[25],inform[1000];
 clrscr();
textcolor(RED);
 textbackground(WHITE);

 cout<<"\n\n\t\t This is the system of the Important File sysytem\n";
 cout<<"\n\n\t In This Project we open the file using the high security Password";
 clrscr();
 cout<<"\n\n\n\n\t\tEnter the password for open the file sysytem\n";
 gotoxy(60,40);
 cout<<"\n\n\n\n                       Password->";
    textcolor(BLUE);
   str[0]=getch();
   cout<<"*";
   str[1]=getch();
   cout<<"*";
   str[2]=getch();
   cout<<"*";
   str[3]=getch();
   cout<<"*";
   str[4]=getch();
   cout<<"*";
   str[5]=getch();
   cout<<"*";
   str[6]=getch();
   cout<<"*";
   str[7]=getch();
   cout<<"*";
   str[8]=getch();
   cout<<"*";
   str[9]=getch();
   cout<<"*";
   str[10]=getch();
   cout<<"*";
   str[11]=getch();
   cout<<"*";
   str[12]=getch();
   cout<<"*";
   str[13]=getch();
   cout<<"*";
   str[14]=getch();
   cout<<"*";
    str[15]='\0';
   cout<<"*";
   if(strcmp(str,"RISHABHSHIVHARE")==0)
   { cout<<"\n\n\n\n\n\tPLEASE WAIT WHILE LOADIND THE PROJECT";
   delay(150);
   cout<<"<";
   delay(150);
   cout<<">";
   delay(150);
   cout<<"<";
   delay(150);
   cout<<">";
   delay(150);
   cout<<"<";
    delay(150);
   cout<<">";
   delay(150);
   cout<<"<";
   delay(150);
   cout<<">";
   delay(150);
   cout<<"<";
   delay(150);
   cout<<">";
    getch();
  clrscr();
  cout<<"\n\n\n\n                     Welcome To The System Of File Operating";
  cout<<"\n\n\n\n                        ";
  gotoxy(85,74);
  delay(180);
   cout<<"R";
   delay(180);
   cout<<"i";
   delay(180);
   cout<<"s";
   delay(180);
   cout<<"h";
   delay(180);
   cout<<"a";
    delay(180);
   cout<<"b";
   delay(180);
   cout<<"h";
   delay(180);
   cout<<" ";
   delay(180);
   cout<<"S";
   delay(180);
   cout<<"h";
   delay(180);
   cout<<"i";
   delay(180);
   cout<<"v";
   delay(180);
   cout<<"h";
    delay(180);
   cout<<"a";
   delay(180);
   cout<<"r";
   delay(180);
   cout<<"e";
   getch();
   clrscr();
   int choice;
   cout<<"\n\n File Oerating System\n";
   cout<<"\n\n [1] WRITING MODE  -";
   cout<<"\n\n [2] READING MODE  -";
   cout<<"\n\n [3]  EXIT MODE    -";
   cout<<"\n\n Enter the Choice  -";
   cin>>choice;
   switch(choice)
   {  case 1:

   int c,choice;  clrscr();
   cout<<"\n\n Do you want to write->";
   char ch;
   fstream f1;
   f1.open("password.dat",ios::app|ios::binary);
   cout<<"\n\n\t DO you want to save the record(y/n)\t";
   cin>>ch;
   if(ch=='y')
   {
   f1.write((char*)&c,sizeof(c));
   }
   f1.close();

   break;
   case 2: cout<<"Enter the password For open this-";
       cout<<"\n\n";
       cstr[0]=getch();
   cout<<"*";
   cstr[1]=getch();
   cout<<"*";
   cstr[2]=getch();
   cout<<"*";
   cstr[3]=getch();
   cout<<"*";
   cstr[4]=getch();
   cout<<"*";
   cstr[5]=getch();
   cout<<"*";
   cstr[6]=getch();
   cout<<"*";
   cstr[7]=getch();
   cout<<"*";
   cstr[8]=getch();
   cout<<"*";
   cstr[9]=getch();
   cout<<"*";
   cstr[10]=getch();
   cout<<"*";
   cstr[11]=getch();
   cout<<"*";
   cstr[12]=getch();
   cout<<"*";
  cstr[13]=getch();
   cout<<"*";
   cstr[14]=getch();
   cout<<"*";
    cstr[15]='\0';
   cout<<"*";
   if(strcmp(cstr,"RISHABHSHIVHARE")==0)
   { cout<<"\n\n\n\n\n\tPLEASE WAIT WHILE LOADIND THE PROJECT";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
    delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
   delay(200);
   cout<<"|";
    getch();
    clrscr();
    //consumer c;
    fstream f1;
    f1.open("password.dat",ios::in|ios::binary);
    while(!f1.eof())
    {
    f1.read((char*)&c,sizeof(c));
    display();
    if(f1.eof())
    {cout<<"\n\n End of the reached\n\n";
    }}
    f1.close();
    }getch();
    break;
  default: cout<<"Error | | | |";
  break;
  }}
   else
{ cout<<"\n\n\n\t\t You are the failure";
 } getch();
 }
void  display()
 { char inform[1000];
 cout<<"Enter the information-";
  gets(inform);

  }








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