BCA-2nd Sem Notes - structure operations

• UNIT-I (Array)

Definition

Declaration & initialization of 1D 

Accessing array elements

Displaying array elements

Sorting arrays

Arrays and function

Declaration & initialization of 1D

Accessing and Displaying

Memory representation of array [Row Major, Column Major]

Multidimensional array

UNIT-II (Pointers)

Definition

Declaration & initialization

Indirection operator

address of operator

pointer arithmetic

dynamic memory allocation

arrays and pointers

function and pointers

UNIT-III (Strings)

Definition

Declaration & initialization

standard library            function strlen()

  strlen(),strcpy(),       strcat() ,strcmp()

Implementation without using standard library functions

UNIT-IV (Structures)

Definition

Declaration & initialization

Accessing fields

structure operations

Nested structures

Union: Definition  declaration

Differentiate between Union and structure

UNIT-V                                     (C Pre-processor)

Definition
Macro substitution directives
File inclusion directives
Conditional compilation
Bitwise Operators
Shift operators
Masks
Bitfield

UNIT-VI                                (File Handling)

Definition of Files,
Opening modes of files
Standard function
fopen(), fclose(),             feof()  fseek(),                    fewind()
Using text files
fgetc(), fputc(), fscanf()

 structure operations 

To access any member of a structure, we use the member access operator (.). The member access operator is coded as a period between the structure variable name and the structure member that we wish to access. You would use the keyword struct to define variables of structure type. 

1. Array elements are accessed using the Subscript variable, Similarly, Structure members are

accessed using dot [.] operator.

2. (.) is called as “Structure member Operator”.

3. Use this Operator in-between “Structure name” & “member name”

Example

#include <stdio.h>

  

struct Point {

  int x;

  int y;

};

  

int main()

{

  struct Point p1 = {10, 20};

  struct Point p2 = p1; // works: contents of p1 are copied to p2

  printf(" p2.x = %d, p2.y = %d", p2.x, p2.y);

  getchar();

  return 0;

}

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