C Programming Assignment Operator

Question

Q)What is the output of the following program segment

#include<stdio.h>

int main()

{

char a = 7 ;

a ^ = 5 ;

printf( "%d", printf( "%d", a + = 3 ) ) ;

return 0;

}

 

A) 5          B) 6                      C) 51                        D) 15

Answer 1

Option C, 51.

char a = 7 ;

a ^ = 5 ; // a = 7 XOR 5 = 2

printf( "%d", printf( "%d", a + = 3 ) ) ;  /* inner printf prints 5(i.e. a=2+3=5). printf function returns integer, which is the number of characters printed by it. Thus '5' is one character and this, the count 1, is returned to outer printf which prints 1 */