Program of four function calculator

#include<conio.h>

#include<iostream.h>

void sum(int, int);

void sub(int, int);

void mul(int, int);

void div(int, int);

void main()

{

    clrscr();

    int a, b;

   char ch;

   cout<<"Enter Number: ";

   cin>>a;

   cout<<"Enter Number: ";

   cin>>b;

   cout<<"Enter Character: ";

   cin>>ch;

   switch(ch)

   {

      case '+' :

      sum(a,b);

      break;

      case '-' :

      sub(a,b);

      break;

      case '*' :

      mul(a,b);

      break;

   case '/' :

      div(a,b);

      break;

   default:

      cout<<"Invalid Character Entered";

   }

   getch();

}

void sum(int x, int y)

{

      cout<<"Sum is: "<<x+y;

}

void sub(int x, int y)

{

      cout<<"Subtraction is: "<<x-y;

}

void mul(int x, int y)

{

      cout<<"Multiplication is: "<<x*y;

}

void div(int x, int y)

{

   if (y!=0)

      cout<<"Division is: "<<x/y;

   else cout<<"Invalid Denomenator";

}

Output

 

Function that return the smallest number of three numbers

#include<conio.h>

#include<iostream.h>

float large(float, float, float);

void main()

{

clrscr();

float a, b, c, l;

cout<<"Enter Number: ";

cin>>a;

cout<<"Enter Number: ";

cin>>b;

cout<<"Enter Number: ";

cin>>c;

l=large(a, b, c);

cout<<"Smallest no is: "<<l;

getch();

}

float large(float x, float y, float z)

{

float n=0;

if (x<y && x<z)

n=x;

else if (y<x && y<z)

n=y;

else if (z<x && z<y)

n=z;

return(n);

}

Output

Program that read +ve number integer and prints its factorial

#include<conio.h>

#include<iostream.h>

void main()

{

clrscr();

int n, i;

unsigned long  f=1;

cout<<"Emter the Number: ";

cin>>n;

if(n<=0)

cout<<"Please Enter valid number";

else

{

for (i=n; i>=1; i--)

{

f=f*i;

}

cout<<"Factorial of "<<n<<" = "<<f;

}

getch();

}

Output

Enter the Number: 5

Factorial of 5 = 120

Program that print the sequence of all Even numbers.

#include<conio.h>

#include<iostream.h>

void main()

{

clrscr();

int a, b;

cout<<"Enter Starting Limit: ";

cin>>a;

cout<<"Enter ending Limit: ";

cin>>b;

cout<<"All Even Numbers Between "<<a<<" & "<<b<<" is\n";

while (a<=b)

{

if (a!=0 && a%2==0)

cout<<a<<" ";

a++;

}

getch();

}

Calculate Circumference With Function

#include<iostream.h>

#include<conio.h>

float area(int&);

float Circumference(int&);

void main()

{

 clrscr();

 int r;

 float a;

 cout<<"enter radius=";

 cin>>r;

 a=area(r);

 cout<<"area="<<a<<endl;

 a=Circumference(r);

 cout<<"Circumference ="<<a<<endl;

 getch();

}

//Area function

float area(int&r)

{

  float a;

  return a=r*r*3.14;

}

//Circumference function

float Circumference(int&r)

{

  float a;

  return a=2*3.14*r;

}