BCA-2nd Sem Notes -Accessing field Structure in C

• 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()

  Accessing field 

Accessing data fields within structs

The dot operator ( period ) is used to access named fields within struct variables:

          john.nClasses = 4;

          totalGPA += sue.gpa;

How to access structure elements? 



Structure members are accessed using dot (.) operator 






#include<stdio.h> 

  

struct Point 

{ 

   int x, y; 

}; 

  

int main() 

{ 

   struct Point p1 = {0, 1}; 

  

   // Accessing members of point p1 

   p1.x = 20; 

   printf ("x = %d, y = %d", p1.x, p1.y); 

  

   return 0; 

}







Output:

x = 20, y = 1

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