C++ Practical Section 2

6. Write a Program for Perfect Number?
Answer:

#include<iostream.h>
#include<conio.h>

Void main()
{
int num, perfect=0,i;
clrscr();

Cout<<"Enter any Number:";
cin>>num;
i=1;
while(i<num)
{
if(num%1==0)
perfect += i;
i++;
}
if(perfect == num)
Cout<<"endl<<"Perfect Number";
else
Cout<<"endl<<"Not Perfect Number";
getch();
}

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7. Write a Program for Product of Two Number.
Answer:

#include<iostream.h>
#include<conio.h>

Void main()
{
int a,b,c;
Cout<<"Enter the First Number";
cin>>a;
Cout<<"Enter the Second Number";
cin>>b;
c = a*b;

Cout<<"The Product = "<<c;
getch();
}

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8.  Input Five Numbers and Find their Average.

Answer:

#include<iostream.h>

#include<conio.h>

Void main()

{

int a,b,c,d,e,sum,avg;

Cout<<"Enter The Five Number";

cin>>a>>b>>c>>d>>e;

sum = a+b+c+d+e;

avg = sum/5;

Cout<<" The Average = "<<avg;

getch();

}

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9. Write a Program that input radius of circle and Find out the Area of Circle.

Answer:

#include<iostream.h>

#include<conio.h>

Void main()

{

float r, circle;

Cout<<"Enter the Radius of Circle";

cin>>r;

circle = 3.14*r*r;

Cout<<"Area of Circle = "<<circle;

getch();

}

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10.  Program to check the number that is Negative or Positive.

Answer:

#include<iostream.h>

#include<conio.h>

Void main()

{

int a;

Cout<<"\n Enter a Number";

cin>>a;

if(a<0)

{

Cout<<"\n Number is Negative";

}

else

{

Cout<<"\n Number is Positive";

}

getch();

}

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