Why is the output -33 for this code snippet

Question

#include

int main()
{
    int a=32;
    printf(\"%d\\n\", ~a);  //line 2
    return 0;
}

o/p = -33

Actually in the original snippet li

Answer 1

Most computers use two's complement representation for negative numbers. See here: http://en.wikibooks.org/wiki/A-level_Computing/AQA/Problem_Solving,_Programming,_Data_Representation_and_Practical_Exercise/Fundamentals_of_Data_Representation/Two%27s_complement