Write a recursive function that takes as a parameter a nonnegative integer and g

Question

Write a recursive function that takes as a parameter a nonnegative integer and generates the following pattern of stars. If the nonnegative integer is 4, then the pattern generated is:

****

***

**

*

*

**

***

****

Also, write a program that prompts the user to enter the number of lines in the pattern and uses the recursive function to generate the pattern. For example, specifying 4 as the number of lines generates the above pattern.

Explain each step of the code and it was written that way.

Program must be written in c++

Explanation / Answer

#include<iostream>

using namespace std;

void line(int,int,int);

int main()

{

int i;

do

{

cout<<"how many rows?";

cin>>i;

if(i<0)

cout<<"must be nonnegative ";

}

while(i<0);

line(i,1,i);

system("pause");

return 0;

}

void line(int m,int n,int p)

{

int i;

if(m>p)

return;

for(i=0;i<m;i++)

cout<<"*";

if(m>0)

cout<<endl;

if(m==0 ==0)

line(m+1,0,p);

else

line(m-1,n,p);

}

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