Answer / vignesh1988i

a pointer is an memory location in which it holds a particular ADDRESS of a particular data type. and mean while through the ADDRESS it will point to that corresponding value in that data typed variable.
DECLARATION OF A POINTER VARIABLE :
int *pointer_variable;

for eg:
int a=45; //line 1
int *b; // line 2
b=&a; //line 3
printf("%d\n",*b); //line 4

explanation:

line 1 :
consider let address of the location 'a' be 1000, which contains a value 45 of integer data type.
line 2 :
*b , represents the integer pointer which can hold an integer variable address.
line 3 :
when we take any variable such as int a or int c etc, when we call as 'a' we will refer to the content inside 'a' (for eg.),in the same way as in the above coding *b is given . but b=&a; this means when we call 'b' the content (ie) the address of variable 'a', and that 'b' will be pointing indirectly the value of 'a' through the 'a's address.
line 4 :
when we want to refer to that pointed value we must give as *pointer_variable & here *b when you give the same 45 will get printed.




thank u

Why do we use header files in c?

0 Answers  

---

There is a mobile keypad with numbers 0-9 and alphabets on it. take input of 7 keys and then form a word from the alphabets present on those keys.

0 Answers  

---

What is an lvalue and an rvalue?

1 Answers  

---

Given an array A[n+m] of n+m numbers, where A[1] ... A[n] is sorted and A[n+1] ... A[n+m] is sorted. Design a linear time algorithm to obtain A[1...n+m] sorted using only O(1) extra space. Time Complexity of your algorithm should be O(n) and Space Complexity O(1).

0 Answers  

---

How to write in a function declaration and in function call in which the function has 'n' number of varible or arguments?

2 Answers  

---

What is the heap?

0 Answers  

---

write function to reverse char array ... without using second array

3 Answers  

---

Write a program to print distinct words in an input along with their count in input in decreasing order of their count

0 Answers  

---

main() { printf("hello%d",print("QUARK test?")); }

5 Answers  

---

What are derived data types in c?

0 Answers  

---

can we declare a function in side the structure?

2 Answers   HCL,

---

What will happen when freeing memory twice

2 Answers  

---