Please explain the output.

Question

int main() {
int a=20;
++a;
int b=a;
++b;
if(b>a){
cout <<++a;
}
else{
cout <<--a;
}

Answer 1

note that if it is : cout << a++;
output : 21
because in this case the compiler will print 'a' value then increase its value by 1.
good luck!

Answer 2

I will explain line by line what happen
a=20
++a : a==21
int b=a : b==21
++b : b==22
b>a : true
cout<<++a is the same as
++a : a==22
cout<<a : display a
as it is pre incrementation

Answer 3

++a means a is now 21, b = a means b is also 21 now, ++b means b is 22 and 22 > 21 so it enters the if statement and outputs 22 (because a which is 21 gets incremented again)

Answer 4

Thanks for the answer both of u 👍👍

Answer 5

You're welcome :)