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Library Functions

Q1:

What will be the output of the program? 
#include<stdio.h>

int main()
{
    int i;
    i = printf('How r u\n');
    i = printf('%d\n', i);
    printf('%d\n', i);
    return 0;
}

A How r u
7
2

B How r u
8
2

C How r u
8
2

D
Error: cannot assign printf to variable

ANS:A - How r u
7
2

Answer: Option
Explanation:
In the program, printf() returns the number of charecters printed on the console i = printf('How r u\n'); This line prints 'How r u' with a new line character and returns the length of string printed then assign it to variable i.
So i = 8 (length of '\n' is 1). i = printf('%d\n', i); In the previous step the value of i is 8. So it prints '8' with a new line character and returns the length of string printed then assign it to variable i. So i = 2 (length of '\n' is 1). printf('%d\n', i); In the previous step the value of i is 2. So it prints '2'.



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