A string is an array of characters terminated by a special character called as a null character.
Pointer to the string is a pointer which is initialized to the base address of the first location in string.
Syntax for declaring a pointer to string.
Datatype *pointer_variable;
Ex : char *ptr;
To initialize the pointer to the address of the string...
Wednesday, 4 April 2018
Tuesday, 3 April 2018
Pointer in Arrays
Consider the declaration
int b[5];
int *ptr;
The pointer to array is given as below
ptr=&b[0];
which is same as
ptr=b;
If the pointer is incremented to the next data elements , then address of the incremented value of the pointer will be same as the value of the next element.
ptr=&b[0] ...
Pointers to Functions
1. Cpp allows functions to be referenced by a pointer.
2. A pointer to a function must be declared to be a pointer to the datatype returned by the functions like void , int , float and so on....
3. In addition , the argument type of the function must also be specified when a pointer is declared.
4. The argument declaration is a list of a formal argument...
Pointers and Functions
1. Pointers are very much used in function and declaration.
2. Sometimes with the use of pointer , a complex function can be easily represented and accessed.
3. The use of pointers in a function definition may be classified into two groups.
Call by Value
Call by Reference
Call By Value:-
1.In a call...
Pointers
A pointer is a variable which holds the memory address of another variable.
Advantage of pointer :
1. It supports dynamic allocation and de allocation of memory segments.
2. It allows creation of data structure such as linked list, stacks, queues, trees and graphs.
3. With the help of pointer , variable can be swapped without physically...
Monday, 2 April 2018
Arrays
The C language provides a capability that enables the user to define a set of ordered data items as an array.
Suppose we had a set of grades that we wished to read into the computer and suppose we wished to perform some operations on these...
Union
Unions like structure contain members whose individual data types may differ from one another. However the members that compose a union all share the same storage area within the computers memory where as each member within a structure is assigned its own unique storage area. Thus unions are used to observe memory. They are useful for application...
Structure
Arrays are used to store large set of data and manipulate them but the disadvantage is that all the elements stored in an array are to be of the same data type. If we need to use a collection of different data type items it is not possible using an array. When we require using a collection of different data item of different data types we can use...
Sunday, 1 April 2018
The case Control Structure
Switch Statement
The switch statement cause a particular group of statements to be chosen from several available groups. The selection is based upon the current value of an expression that is include within the switch statement.
The form of switch statement is
switch (integer expression)
{
case constant 1:
do this;
...
The Break and Continue Statement
The Break Statement :-
The keyword break allows us to jump out of a loop instantly without waiting to get back to the conditional test. When the keyword break is encountered inside any C loop, automatically passes to the first statement after the loop. For e.g. the following program is to determine whether a number is prime or not
Logic...
Loop Control Structures
These are three methods by way of which we can repeat a part of a program in C programming.
1. Using a for Statement
2. Using a while Statement
3. Using a do-while Statement
The While Loop (pre-test Loop)
The general form of while is as shown below :
initialize loop counter ;
while (test...
Control Structure in C
The decision control structure in C can be implemented using
1. The if Statement
2. The if - else Statement
3. The Nested if - else Statement
The if Statement
The general form of it statement looks like this :
if(this condition is true)
...
Data Types in C Language
A programming language is proposed to help programmer to process certain kinds of data and to provide useful output. The task of data processing is accomplished by executing series of commands called program. A program usually contains different...
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