Sign extension with bitwise shift operation

Question

following this Q&A I tried to exam the answer so I wrote:

#include 

int main ()
{

        int t;int i;
        for (i=120;i<140;i++){         


        

Answer 1

The rule in C and C++ is that the result of a right-shift of a negative value is implementation defined. So read your compiler's documentation. The various explanations you've gotten are valid approaches, but none of these is mandated by the language definition.