Add Two Numbers Without + Operator
C++
Hard
4 views
Problem Description
Add two numbers using only bitwise operators.
Real Life: Understanding how CPU does addition internally.
Step-by-Step Logic:
1. XOR gives sum without carry
2. AND gives carry positions
3. Shift carry left by 1
4. Repeat until no carry
5. This is how hardware adds numbers
Official Solution
void operator_q15_add_without_plus() {
int a = 15;
int b = 27;
cout << "Adding " << a << " and " << b << " without + operator" << endl;
while(b != 0) {
int carry = a & b; // Find carry bits
a = a ^ b; // Sum without carry
b = carry << 1; // Shift carry left
}
cout << "Result: " << a << endl;
}
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