hello i am a beginner who just started to use code::blocks in Linux mint ide for c++ and i keep getting a weird code (0x0) even though i know that nothing is wrong,and when compiled manually i wont get it ,code:

#include <iostream>

int main()
{
std::cout<<"hin";
return 0;
}

and if i change return 0 with 1 the code become 0x1 ,code:

i found a forum talking about removing it but i want to know what is it and if i did something wrong