How to use the Increment and Decrement Operators In C++

Q: How to use the Increment and Decrement Operators In C++

Here simply use the subtraction operator between two numbers, two times so that minus-minus multiplies and produce the + operator, and return the sum of the numbers.

2. Using the Subtraction Operator

4. Using printf() method

Here use the increment/decrement operator to add two numbers. Decrement a number by one till it becomes zero and increment another number by one, return the second number.

while(B > 0){ 
    A++; 
    B--; 
}

C++ Program to Add Two Numbers Using the Increment and Decrement Operators

C++

// C++ program to add two number using 
// increment/decrement operator 
#include <iostream> 
using namespace std; 
  
// Function to return sum 
// of two number 
int addTwoNumber(int A, int B) 
{ 
    // When A is positive 
    while (A > 0) { 
        A--; 
        B++; 
    } 
  
    // When A is negative 
    while (A < 0) { 
        A++; 
        B--; 
    } 
  
    // Return sum of A and B 
    return B; 
} 
  
// Driver Code 
int main() 
{ 
    // Given two number 
    int A = 4, B = 11; 
  
    // Function call 
    cout << "sum = " << addTwoNumber(A, B); 
    return 0; 
}

Output

sum = 15

Time Complexity: O(N), where N is the min(A,B)
Auxiliary Space: O(1)

Add Two Numbers in C++

The addition of two numbers is a simple task in C++ that can be done using the arithmetic addition operator (+). But there are many other ways to find the sum of two numbers in C++. In this article, we will discuss 7 different ways to add two numbers in C++.