Some Important conceptual output based questions of Arrays and Pointers in C lnaguage

Some Important conceptual output based questions of Arrays and Pointers in C language 

1. 

void main()

{

   int Blog[]={1,2,3};

   printf("%d %d %d",Blog[1],Blog[2],Blog[3]);

}

Output: 2 3 0

Explanation: Here Blog[0],Blog[1] and Blog[2] will be initialized with 1,2 and 3 respectively. and rest are initialized with 0.

2.

void main()

{

   int Blog[]={33,44};

   printf("%x",Blog);

 }

Output: Base address of Blog

Explanation: The array name always holds the base address of an array. If we print *Blog then output will be the first value.

3.void main()

{

  int Blog[4]={22,33,44,55},*ptr,T;

  ptr=Blog;

  T=++(*ptr);

  printf("%d %d",*ptr,T);

 }

Ans: 23 23

Exlanation: *ptr points to the first element of an array Blog. After ++(*ptr) , the value 

of first element is increased by 1 that is 23 and also updated to the array. Hence the output will be 23 23.

4.

void main()

{

  int Blog[4]={22,33,44,55},*ptr,T;

  ptr=Blog;

  T=*(ptr++);

  printf("%d %d",*ptr,T);

 }

Ans: 33 22

Explanation: *ptr points to the first element of an array Blog. After *(ptr++), the pointer ptr points to next element that is second element of array but due to post increment the variable T contains the first element of an array Blog.