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A Puzzle on C/C++ R-Value Expressions

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  • Difficulty Level : Easy
  • Last Updated : 29 May, 2017

What will be the output of following program?

#include <stdio.h>
int main()
   int i = 0xAA;
   ~i, printf("%X\n", i);
   return 0;

Output: 0xAA

No change in i value, the emphasis is on l-value and r-value expressions. The expression ~i is an r-value, it has to be assigned to an l-value to retain the change.

Puzzle phrased by Venki. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

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