A recursive method with one parameter prints x asterisks, followed by x exclamation points. Do NOT use any loops. Do NOT use any variables other than x.

Question

1.00/5 (1 vote)

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As the PrintPattern function is only being called twice, it prints just 2 exclamation marks '!' instead of 3. Its not a very difficult problem but I am stuck at it. Please help ASAP.

What I have tried:

#include <stdio.h>

char PrintPattern(int n)
{
    
    if(n>0)
    {
        printf("*");
         n--;
        PrintPattern(n);
      
    }
    if(n!=0)
        printf("!");

}

int main()
{
    int n;
    n = 3;
  
    PrintPattern(n);
    return 0;
}

Posted 12-Aug-21 2:25am

Hemil Shah 2021

Updated 12-Aug-21 3:55am

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2 solutions

Solution 1

Use the debugger to find out how often your function is called. I bet 3 times :-O

Posted 12-Aug-21 2:34am

KarstenK

Comments

Hemil Shah 2021 12-Aug-21 8:45am

But then what is the problem? How do I resolve it ? I want x asterisk followed by x examination marks.

Dave Kreskowiak 12-Aug-21 9:44am

D E B U G G E R ! ! ! ! USE IT!
The debugger is there to debug YOU, not the code. It's there to help you understand what your code is really doing instead of you assuming what it's doing. It will help you find the logic errors in your code.

KarstenK 12-Aug-21 10:58am

when you are too lazy to use the debugger than you shouldnt code. I was debugging these days some internet socket code ...

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Patrice T · Accepted Answer · 2021-08-12T02:56:00

Solution 2

Try

C++

char PrintPattern(int n) // function should be void instead of char.
{
    if(n>0)
    {
        printf("*");
         n--;
        PrintPattern(n);
        printf("!");
    }
    if(n!=0)
        printf("!");
}

As KarstenK suggested, try the debugger, it is an invaluable tool to help you understand what is going on in your code.

Posted 12-Aug-21 2:56am

Patrice T

Comments

Hemil Shah 2021 12-Aug-21 9:06am

I actually tried couple of approaches and hence changed the return type to char, but forgot to revert it back to void while posting the original code I tried. But thanks a lot, mates! I'll try using debugger from now on in such cases.

Greg Utas 12-Aug-21 9:27am

But do you know why your code failed? When you first called the function, n was 3. But what was n when you reached your if(n != 0) line?

Patrice T 12-Aug-21 9:38am

I have let this bug to have it understood with debugger :)

Greg Utas 12-Aug-21 9:57am

I doubt it'll be debugged after you fixed it. But I gave you a 5.

Patrice T 12-Aug-21 10:09am

Thank you

A recursive method with one parameter prints x asterisks, followed by x exclamation points. Do NOT use any loops. Do NOT use any variables other than x.

2 solutions

Solution 2

Solution 1

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A recursive method with one parameter prints x asterisks, followed by x exclamation points. Do NOT use any loops. Do NOT use any variables other than x.

2 solutions

Solution 2

Solution 1

Add your solution here

Preview 0

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