Skip to main content

Pointer in c language.

 

What is Pointer ?

Pointer is a address variable that hold the address of another variable.The * (indirection or dereference operator), that  gives the contents of an object that pointed to by a pointer.

To declare a pointer to a variable:

data_type_name * variable name 
int *ptr;

Example 1:

void main( )
{
       int a = 10 ;
       printf ( "\nAddress of a = %u", &a );
       printf ( "\nValue of a = %d", a );
}
Output:
address of a=1565
value of a=10

Example 2:

void main()
{
  int a = 5 ;
  printf ( "\nAddress of a = %u", &a );
  printf ( "\nValue of a = %d", a ) ;
  printf ( "\nValue of a = %d", *( &a ) );
}

Output:

Address of a = 1444
Value of a = 5
Value of a = 5
Labels:

Comments

Post a Comment

Popular posts from this blog

WAP to calculate the monthly telephone bills as per the following rule: Minimum Rs. 200 for upto 100 calls. Plus Rs. 0.60 per call for next 50 calls. Plus Rs. 0.50 per call for next 50 calls. Plus Rs. 0.40 per call for any call beyond 200 calls.

  #include<iostream.h> #include<conio.h> void main() { int calls; float bill; cout<<" Enter number of calls : "; cin>>calls; if (calls<=100) bill=200; else if (calls>100 && calls<=150) { calls=calls-100; bill=200+(0.60*calls); } else if (calls>150 && calls<=200) { calls=calls-150; bill=200+(0.60*50)+(0.50*calls); } else { calls=calls-200; bill=200+(0.60*50)+(0.50*50)+(0.40*calls); } cout<<" Your bill is Rs. "<<bill; getch(); }   Output: Enter number of calls : 190 Your bill is Rs.250
6 comments
Read more

C++ Program to define a Class BOOK and accessing member function using its object.

  #include<iostream.h> #include<stdio.h> #include<conio.h> class BOOK { int BOOKNO; char BOOKTITLE[20]; float PRICE; void TOTAL_COST( int N) { float tcost; tcost=PRICE*N; cout<<tcost; } public : void INPUT() { cout<<" Enter Book Number "; cin>>BOOKNO; cout<<" Enter Book Title "; gets(BOOKTITLE); cout<<" Enter price per copy "; cin>>PRICE; } void PURCHASE() { int n; cout<<" Enter number of copies to purchase "; cin>>n; cout<<" Total cost is "; TOTAL_COST(n); } }; void main() { BOOK obj; obj.INPUT(); obj.PURCHASE(); getch(); }
8 comments
Read more

Write a program to calculate the total expenses. Quantity and price per item are input by the user and discount of 10% is offered if the expense is more than 7000.

  #include<iostream.h> #include<conio.h> void main() { int totalexp, qty, price, discount; cout<<" Enter quantity: "; cin>>qty; cout<<" Enter price: "; cin>>price; totalexp=qty*price; if (totalexp>7000) { discount=(totalexp*0.1); totalexp=totalexp-discount; } cout<<" Total Expense is Rs. "<<totalexp; getch(); }
17 comments
Read more