C++ Program to Multiply Twp Numbers Without * Operator

This C++ program multiplies two given numbers without using multiplication operator. The multiplication is achieved by use of a for loop which keeps adding first number to variable product in each iteration till the value of second number drops to 0.

Here is the source code of the C++ program multiplies two given numbers without using multiplication operator. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C++ Program to multiply numbers without * operator
  3.  */
  4. #include <iostream>
  5.  
  6. int main()
  7. {
  8.     long op1, op2, product = 0;
  9.  
  10.     std::cout << "Enter the numbers ";
  11.     std::cin >> op1 >> op2;
  12.     while(op2 > 0)
  13.     {
  14.         product = product + op1;
  15.         op2--;
  16.     }
  17.     std::cout << std::endl << "The product of " << op1
  18.               << " and " << op2 << " is " << product;
  19. }

$ a.out
Enter the numbers 10 20
The product of 10 and 20 is 200

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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