Question

Write a recursive method called printNumPattern() to output the following number pattern. Given a positive integer as input (Ex: 12), subtract another positive integer (Ex: 3) continually until 0 or a negative value is reached, and then continually add the second integer until the first integer is again reached. Ex. If the input is:

Answer 1

Answer:

See Explanation Below

Explanation:

// C++ printNumPattern() recursive method

// Comments are used for explanatory purpose

// Only the recursive is submitted

// Method starts here

void printPattern(int num1, int num2, bool dec)  

{  

// Print num2.  

cout << num2 << " ";  

//Printing to num1

if (dec == false && num1 ==num2)  {

 return;  }

// Printing to 0 or negative.  

if (dec)  

{  

// If num2 is greater than num2

if (num2-num1 > 0)  

 printPattern(num1, num2-num1, true);  

else // recur with false dec  

 printPattern(num1, num2-num1, false);  

}  

else // If dec is false.  

 printPattern(num1, num2+num1, false);  

}  

//End of recursive