Numerical Operations using Control Strucure..

CODE:

#include<iostream.h>

#include<conio.h>

#include<math.h>

class num

{

public:

int a,b;

void add()

{

cout<<"\nEnter the two values";

cin>>a>>b;

cout<<"\nOutput:"<<a+b;

}

void sub()

{

cout<<"\nEnter the two values";

cin>>a>>b;

cout<<"\nOutput:"<<a-b;

}

void mul()

{

cout<<"\nEnter the two values";

cin>>a>>b;

cout<<"\nOutput:"<<a*b;

}

void div()

{

cout<<"\nEnter the two values";

cin>>a>>b;

cout<<"\nOutput:"<<a/b;

}

};

void main()

{

int n,s;

clrscr();

num obj;

do

{

cout<<"\nSelect your option";

cout<<"\n\t\t1.Addition\n\t\t2.Subtraction\n\t\t3.Multiplication\n\t\t4.Division\n\t\t5.Eit\n";

cout<<"\nEnter the case...";

cin>>n;

switch(n)

{

case 1:

{

obj.add();

break;

}

case 2:

{

obj.sub();

break;

}

case 3:

{

obj.mul();

break;

}

case 4:

{

obj.div();

break;

}

default:

{

clrscr();

cout<<"\nSorry!!\nYou have entered an wrong value..";

goto exit;

}

}

}

while(n!=5);

exit:

getch();

}

OUTPUT: