C++ program, design using nested loop

Question

I have to make a program for generating the following output:

Example:

 & & & & & & &
   & & & & &
     & & &    
       &

What I have done so far:

#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    int i,j,k,n;
    cout<<"How many rows?\n";
    cin>>n;
    for(i=n;i>0;i-=2)
    {
        cout<<"\n";

        for(k=(i+1)/2;k>0;--k)
        cout<<" ";

        for(j=1;j<=i;++j)
        cout<<"&";
    }
}

What the output comes:

    & & & & &
  & & &
&

Please correct me where I am making the mistake. Any help will be appreciated. Thanks.

Mithrandir · Accepted Answer · 2013-03-01 18:02:20Z

1

Your first try seems a bit complicated. I'd do something like this:

#include <iostream>

int main()
{
    int i,j,k,n;
    std::cout << "How many &'s in the start row?\n";
    std::cin >> n;
    std::cout << std::endl;
    for(i=0; i < n; i+=2)
    {
        for(k=0 ; k < i; k++ )
        {
                std::cout << " ";
        }
        for(j=0; j<(n - i); ++j)
        {
                std::cout<<" &";
        }
        std::cout << std::endl;
    }
    return (0);
}

answered Mar 1, 2013 at 18:02

Mithrandir

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5 Comments

Manoj Over a year ago

compiler is giving "Declaration Syntax Error" in the first line

Mithrandir Over a year ago

You are running an awfully old compiler. Change the include back to the old #include<iostream.h> and remove all the "std::"'s.

Manoj Over a year ago

can u give me some link to download a better and improved version for running C++. I have windows 8.

Mithrandir Over a year ago

Why don't you use the excellent VS 2012 express for Desktop (microsoft.com/visualstudio/deu/downloads) or the great GCC.

raratiru Over a year ago

@ManojPandey It would be great, very relieving and a very good practice to also accept the satisfying answer.

Chhavi Negi · Accepted Answer · 2015-09-22 10:21:02Z

0

Better late than never. Try this simple solution :

#include <iostream>
using namespace std;

int main()
{
  char ch = '&';
  for(int i = 1; i <= 4; i++)
  {
    for(int j = 1; j <= 3; j++)
    {
        if( i > j)
            cout << " ";
        else
            cout << ch;   
    }

    cout << ch;

    for(int j = 3; j >= 1; j--)
    {
        if( i > j)
            cout << " ";
        else
            cout << ch;   
    }

    cout << "\n";
  }

  return 0;
}

answered Sep 22, 2015 at 10:21

Chhavi Negi

1

1 Comment

raratiru Over a year ago

Seems like the provided answer and comments have already solved this old problem.

Nagarjuna rachakunta · Accepted Answer · 2016-12-27 06:35:08Z

0

import java.util.*;
import java.lang.*;
import java.io.*;
class Design{
     public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        for(int i=0;i<4;i++)
        {
            for(int k=0;k<i;k++)
            {
                System.out.print(" ");
            }
            for(int j=i;j<7-i;j++)
            {
                System.out.print("&");
            }
            System.out.println();

        }
    }

}

answered Dec 27, 2016 at 6:35

Nagarjuna rachakunta

1

2 Comments

Mikel F Over a year ago

Consider adding an explanation for what the problem was that you are solving and how this code accomplishes that.

vaibhav Over a year ago

its better to provide some tech details like how its working instead of just posting code only.

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