can anyone help me?

Question

int main() {
int a = 4, b;
b = a + ++a;
cout<<b;
return 0;
}

why does this code outputs 10 as b?

Answer 1

First thing it does is the ++a, so it will set a to 5 and you're left with b = a + a so b = 5 + 5 = 10