C or C++?

What should I learn?

#include <stdio.h>

int main() {
   
    printf("Hello World \n");
    getchar();
}

C

C++ is useless for most purposes since it is neither suitable for low-level work nor high level work. It is useful for any kind of graphics programming, though, like video games.

If you want to learn a true object oriented language, learn Java.