Pointers and Arrays

Pointers and Arrays

·       Pointer

:  A variable that store another variable address

Syntax :

<type> *pointer_name;

Use *  = Content of the variable

Use & = Address of the variable

          Int number  = 10;

          Int *number1 ;

          number1 = &number;

for pointer to pointer :

          Int number  = 10;

          Int *number1 ;

          Int **number2 ;

          number1 = &number;

Example :

int main(){

          int angka1 = 10;

          int *angka2 ;

          int **angka3 ;

          angka2 = &angka1;

          angka3 = &angka2;

          printf("%d\n" , **angka3);

          return 0;

}

·       Array

: A single variable that store multiply value distinguish by their index , can be accessed as group or  individually

Type of Array :

1.     One dimensional

2.     Two dimensional

3.     Three dimensional

v One Dimensional Array

Syntax :

     <type> array_value[value_dim];

Example :

     Int number[4];

Initialization :

     Int number[4] = {1 , 2 , 3 , 4};

To access an Array :

     number[i];               //i is index

     printf(“%d” , number[2]);

v Two Dimensional Array

Uses Row X Column

Syntax :

     <type> array_value [ value_row ] [ value_column];

Example ;

     Int number[3] [4];

Initialization :

1.     Int number [3] [4] =  {         {1 , 2 , 3 , 4 },

                                                           {5 , 6 , 7 , 8 },

                                                           {9 , 10 , 11 ,12 }

                                                  };

2.     int number[3][4] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};

3.     int number[2][2] = {1, 2, 3, 4 };

4.     int number[2][2] = { { 1, 2 }, { 3, 4 } };

5.     int number[2][2] = { { 1 }, { 3, 4 } }; // This equals to 

1	0
3	4

v Three Dimensional Array

Uses Row X Column X Depth

Syntax :

     <type> array_value [ value_row ] [ value_column] [ value_depth] ;

NIM : 2201755781

Binus.ac.id

Skyconnectiva.com

Nama : Virnando Tan Wijaya

Reference

https://binus.ac.id/