Question

How to write a pseudo code that multiply positive integers x and y by using addition and subtraction only.

Answer 1

Answer:

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Answer 2

Answer:

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// C++ program to Multiply two integers without  

// using multiplication, division and bitwise  

//  operators, and no loops  

#include<iostream>  

 using namespace std;  

class GFG  

{  

/* function to multiply two numbers x and y*/

public : int multiply(int x, int y)  

{  

   /* 0 multiplied with anything gives 0 */

 if(y == 0)  

   return 0;  

     /* Add x one by one */

   if(y > 0 )  

   return (x + multiply(x, y-1));  

     /* the case where y is negative */

   if(y < 0 )  

   return -multiply(x, -y);  

}  

};  

 // Driver code  

int main()  

{  

   GFG g;  

   cout << endl << g.multiply(5, -11);  

   getchar();  

   return 0;  

}