Is it possible to add numbers without using "+"?

Answer 1

cout << 1-(-1);

// outputs 2.

Answer 2

You can also do it using only bitwise operations like this:

int add(int a, int b){
while(b){
int t = a ^ b;
b = (a & b) << 1;
a = t;
}
return a;
}

^ is binary XOR, & is binary AND and << is binary left shift.