(1) A triangle of starts (the user supplies the height): * ** *** **** (2) Anoth

Question

(1) A triangle of starts (the user supplies the height):

*
**
***
****

(2) Another triangle of stars (the user supplies the height):

*
***
*****
*******

(3) Another triangles of stars (the user supplies the height):

*
**
***
****
***
**
*

(4) A double rectangle of stars (the user supplies the height):

* * * * * *
* * * * *
* * * * * *
* * * * *
* * * * * *

(5) A table of power of 2 (user supplies the number)

2 to the power 0 is 1
2 to the power 1 is 2
2 to the power 2 is 4
2 to the power 3 is 8

(6) A table of factorials (user supplies the number)

1! = 1 = 1
2! = 2 x 1 = 2
3! = 3 x 2 x 1 = 6
4! = 4 x 3 x 2 x 1 = 24
5! = 5 x 4 x 3 x 2 x 1 = 120

Explanation / Answer

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1.

#include<iostream>
using namespace std;
int main()
{
    int i,j,h;
    cout<<"Enter the height: ";
    cin>>h;
    for(i=1;i<=h;i++)
    {
        for(j=1;j<=i;j++)
        {
            cout<<'*';
        }
        cout<<" ";
    }
}

2.

#include<iostream>
using namespace std;
int main()
{
    int i,j,h;
    cout<<"Enter the height: ";
    cin>>h;
    for(i=0;i<h;i++)
    {
        for(j=1;j<=(2*i)+1;j++)
        {
            cout<<'*';
        }
        cout<<" ";
    }
}

3.

#include<iostream>
using namespace std;
int main()
{
    int i,j,h;
    cout<<"Enter the height: ";
    cin>>h;
    for(i=1;i<=h/2;i++)
    {
        for(j=1;j<=i;j++)
        {
            cout<<'*';
        }
        cout<<" ";
    }
    if(h%2!=0)
    {
        for(j=1;j<=(h/2)+1;j++)
        {
            cout<<'*';
        }
        cout<<" ";
    }
    for(i=1;i<=h/2;i++)
    {
        for(j=i;j<=h/2;j++)
        {
            cout<<'*';
        }
        cout<<" ";
    }
}

4.

#include<iostream>
using namespace std;
int main()
{
    int i,j,h;
    cout<<"Enter the height: ";
    cin>>h;
    for(i=1;i<=h;i++)
    {
        if(i%2!=0)
        {
            for(j=1;j<=h;j++)
        {
            cout<<'*';
        }
        cout<<" ";
        }
        if(i%2==0)
        {
            for(j=1;j<=h-1;j++)
        {
            cout<<'*';
        }
        cout<<" ";
        }
    }
}

5.

#include<iostream>
using namespace std;
int main()
{
    int j,h;
    cout<<"Enter the number: ";
    cin>>h;
        for(j=0;j<=h+1;j++)
        {
            cout<<" ";
            cout<<h<<" to the power "<<j<<" is "<<(j*h);
        }
}

6.

#include<iostream>
using namespace std;
int main()
{
    int i,j,h,m;
    cout<<"Enter the number: ";
    cin>>h;
    for(i=1;i<=h;i++)
    {
        m=1;
        cout<<i<<"! = ";
        for(j=i;j>=2;j--)
        {
            cout<<j<<" * ";
            m=m*j;
        }
        cout<<"1 = "<<m<<" ";
    }
}

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