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#include<iostream.h>
#include<conio.h>
long factorial(int);
void main(void)
{
clrscr();
int x;
long y;
cout<<"Enter the numbers whose factorial is to e calculated...\n";
cin>>x;
y=factorial(x);
cout<<"Factrorial of "<<x<<"!"<<"="<<y;
getch();
}
long factorial(int x)
{
int fact=1;
for(int i=x;i>0;i--)
fact*=i;
return fact;
}

#include<iostream.h>
#include<math.h>
#include<conio.h>
class myclass
{
int number;
public:
void input()
{
cout<<"Enter a number=";
cin>>number;
}
void print()
{
cout<<"\n.The value of entered number is="<<number<<endl;
}
double squareroot();
double powerof(int power);
};
double myclass::squareroot()
{
double result;
result=sqrt(number);
return result;
}
void main(void)
{
clrscr();
myclass myclass;
myclass.input();
cout<<"\n Squareroot of entered number is=";
cout<<myclass.squareroot()<<endl;
cout<<"number to power 2 is="<<myclass.powerof(2)<<endl;
getch();
}
double myclass::powerof(int power)
{
double result;
result=pow(number,power);
return result;
}

#include<iostream.h>
#include<conio.h>
class myclass
{
int num1,num2;
public:
void input()
{
cout<<"Enter two numbers you want="<<endl;
cin>>num1>>num2;
}
int sum();
int product();
};
int myclass::sum()
{
int add=num1+num2;
return add;
}
int myclass::product()
{
int pro=num1*num2;
return pro;
}
void main(void)
{
clrscr();
myclass myclass;
myclass.input();
cout<<"Sum of entered numbers="<<myclass.sum()<<endl;
cout<<"Product of entered numbers="<<myclass.product()<<endl;
getch();
}
 

#include<iostream.h>
#include<conio.h>
class greateroftwo
{
int greater;
int findmax(int i,int j);
public:
void getandcomputemax();
void printmax();
};
int greateroftwo::findmax(int a,int b)
{
if(a>b)
return a;
else
return b;
}
void greateroftwo::getandcomputemax()
{
int c,d;
cout<<"Enter two integers...\n";
cin>>c>>d;
greater=findmax(c,d);
}
void greateroftwo::printmax()
{
cout<<"the greater of two integers is="<<greater<<endl;
}
void main(void)
{
clrscr();
greateroftwo test;
test.getandcomputemax();
test.printmax();
getch();
}