In which header file is the NULL macro defined?

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In which header file is the NULL macro defined?



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2) What will be the output of the program ?

 #include<stdio.h>
int main()
{
int i=3, *j, k;
j = &i;
printf("%d\n", i**j*i+*j);
return 0;
}

3) Which of the following does not initialize ptr to null (assuming variable declaration of a as int a=0;)?

4) Which is an indirection operator among the following?

5) What will be the output of the following C code?

 #include <stdio.h>
int x = 0;
void main()
{
int *const ptr = &x;
printf("%p\n", ptr);
ptr++;
printf("%p\n ", ptr);
}

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