doubt with a code in C++

Question

Why this code results in "0"?

int a=10;
int main() {
cout<<(a==9)
}

Answer 1

0 means condition result is false because a is not equal to 9

Answer 2

0 because 10 is not equal to 9.i think you have to include <stdbool.h>
for using bool.

Answer 3

0 means condition result is false because a is not equal to 9

Answer 4

0

Answer 5

If a=10, I understand that in the next line, "a" keeps te value, and then test equal to 9, but I don´t undertsand why the result is "0"

Answer 6

Thanks a lot Roman J, for the clarification
Best Regards

Answer 7

Where u use (9==10) its treat like if, else condition. here 9 is not equal to 10 so condition false and output become 0