More C++ programs

//Program to display Floyd triangle:-
#include<iostream.h>
main()
{
    int line,i,num=1,incr;
    cout<<" How many lines = ";
    cin>>line;
    cout<<"\n \n Floyds Triangle \n \n";
    for(i=1;i<=line;i++)
    {
        for(incr=1;incr<=i;incr++)
        {
            cout<<num;
            cout<<"\t";
            num++;
        }
        cout<<"\n";
    }
}

Output:-

How many lines = 7

Floyds triangle


1
2           3
4           5           6
7           8           9           10
11         12         13         1 4          15
16         17         18         19            20          21
22          23         24         25           26          27          28

---

//Program to check whether number is prime or not:-

#include<iostream.h>
main()
{
    int num,temp=0,i;
    cout<<"\n Enter the number =";
    cin>>num;
    if(num>0)
    {
        for(i=2;i<=num-1;i++)
        {
            if(num%i==0)
            {
                cout<<"\n Number is not a Prime number \n \n";
                temp=1;
                break;
            }
        }
        if(temp==0)
        {
            cout<<"\n Number is Prime \n \n";
        }
    }
    else
        cout<<"Enter only Positive numbers";
}


Output:-

Enter the number = 7
Number is Prime

---

//Program of destructors in c++:-

#include<iostream.h>
class ABC
{
int *width,*height;
public:
    ABC(int,int);
    ~ABC();
        int area()
    {
            return(*width**height);
    }
};
ABC::ABC(int a,int b)
{
width=new int;
height= new int;
*width=a;
*height=b;
}
ABC::~ABC()
{
    delete width;
    delete height;
   
}
main()
{
    ABC obj1(4,9),obj2(7,5);
    cout<<obj1.area();
    cout<<"\n";
    cout<<obj2.area();
}


Output :-
36
35

---

//Program of static member variable and member function:
#include<iostream.h>
class ABC
{
private :static int data;
public: static void getdata()
        {
            ++data;
            cout<<"count is =";
            cout<<data<<"\n";
        }
     void putdata()
        {
            ++data;
            cout<<"now count is ="<<data<<"\n";
        }
 void newfunction()
{
++data;
cout<<"now count is ="<<data;
}
};
int ABC::data=5;
void main()
{
    ABC obj;
    ABC::getdata();
    obj.putdata();
    obj.newfunction();
}

Output:-
count is =6
now count is =7
now count is =8

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