ch- POinter

pointer
1.7 #include void fun(int *ptr) 
{ 
*ptr=30;
 } 
int main()
 { 
int y=20; fun(&y);
 printf(“%d”,y);
 return 0; 
 } 
The output of above program is 
A. 20 
B. 30 
C. Compiler error
D. Runtime error 

ans B. 30 

*ptr++ is equivalent to
A) ptr++
B) *ptr 
C) ++ptr 
D) ++*ptr 


What will be the output of the following code? 
main() 
 { 
 int i=2,*j; j=&i;
 printf("%d",i**j*i+*j);
 } 
A) Syntax error due to Invalid expression in printf
B) Print junk value 
C) 16
D) 10 


true /false

 Two pointer variables cannot be subtracted. 

Are the three declarations char **apple, char *apple[], and char apple[][] same? FALSE 

The expressions *ptr++ and ++*ptr are same FALSE

Are the expression *ptr++ and ++*ptr are same? true 

___pointer_______ is a variable which holds the address of another variable

A pointer that does not point to any data object is ___null_____ 

Write a note on pointers and its uses. What do you mean by refreshing and de-refreshing of a pointer variable.?

After incrementing a float pointer ptr by 1 it would be incremented by _(I) 4 Bytes_______________

The ______(L) *___________ operator returns the value of the variable to which its operand points.

A pointer in C which has not been initialized is known as ___wild______ pointer.

__astreek______ symbol is used access the value pointed by a pointer. 

Explain about „Pointer to function „ with suitable example

Explain the relation of array and pointer with example.