Lecture 159

Lecture 159

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void display(char*);  // Prototype

main ()

{

  char name[]={"Shahid"};

  display(name);

  getch();

  return 0;

}

void display(char name[])

{

  cout<<"Your name is : ";

  int i=0;

  while(name[i] != '\0')    

  {

        cout<<name[i];

        i++;

  }     

}

Output:

Lecture 158

Lecture 158

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int f(int);  // Prototype

int g(int);

main ()

{

  int x,y,s=2;

  s*=3;

  y=f(s);

  x=g(s);

  cout<<"\n "<<s<<y<<x;

  getch();

  return 0;

}

int t=8;

int f(int a)

{

  a+=-5;

  t-=4;

  return a+t;

}

int g(int a)

{

  a=1;

  t+=a;

  return a+t;

}

Output:

Lecture 157

Lecture 157

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int i=0;

void Val();  // Prototype

main ()

{

  cout <<"\n Main's i : "<<i;     

  i++;

  Val();

  cout <<"\n Main's i : "<<i;     

  Val();

  getch();

  return 0;

}

void Val()

{

  i=100;

  cout <<"\n Val's i : "<<i;     

  i++;

}

Output:

Lecture 156

Lecture 156

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void Extern();  // Prototype

int x=21;

void display();  // Prototype

main ()

{

  int x=20;

  cout <<"\n Variable Local x : "<<x;     

  display();

  Extern();

  getch();

  return 0;

}

void Extern()

{

  cout <<"\n Variable Global : "<<x;  

  extern int x;

  x=23;

  cout <<"\n Variable external : "<<x;

}

void display()

{

  cout <<"\n Variable Global : "<<x;  

}

Output:

Lecture 155

Lecture 155

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void Register();

void increment();

void increment1();  // Prototype

main ()

{

  Register();

  increment();

  increment();

  increment1();

  increment1();

  getch();

  return 0;

}

void Register()

{

  register int i;

   for(i=1;i<6;i++)

       cout <<"\n Register i : "<<i;

}

void increment()

{

    auto int i=1;

    cout <<"\n increment in auto i : "<<i;

    i=i+1;  

}

void increment1()

{

    static int i=1;

    cout <<"\n increment in static i : "<<i;

    i=i+1;  

}

Output:

Lecture 154

Lecture 154

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void Auto();

void Auto1();// Prototype

main ()

{

  Auto();

  getch();

  return 0;

}

void Auto()

{

  auto int i,j;

  cout <<"\n  i : "<<i<<"  j : "<<j;

  Auto1();

}

void Auto1()

{

  auto int i=1;

   {

        cout <<"\n  i : "<<i;    

         auto int i=2;

        {

          cout <<"\n  i : "<<i;    

          auto int i=3;

            {

               cout <<"\n  i : "<<i;    

            }

        }

   }

}

Output:

Lecture 153

Lecture 153

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void swapr(int*,int*);  // Prototype

main ()

{

  int a=10,b=20;

  cout <<"\n a =  "<<a<<" b =  "<<b;

  swapr(&a,&b);

  getch();

  return 0;

}

void swapr(int *a,int *b)

{

   int t;

   t=*a;

   *a=*b;

   *b=t;

   cout <<"\n a =  "<<*a<<" b =  "<<*b;

    

}

Output:

Lecture 152

Lecture 152

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void swapv(int,int);  // Prototype

main ()

{

  int a=10,b=20;

  swapv(a,b);

  cout <<"\n a =  "<<a<<" b =  "<<b;

  getch();

  return 0;

}

void swapv(int a,int b)

{

   int t;

   t=a;

   a=b;

   b=t;

   cout <<"\n a =  "<<a<<" b =  "<<b;

    

}

Output:

Lecture 151

Lecture 151

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int pow(int,int);

int pow1(int,int,int);  // Prototype

main ()

{

  int number = 0;

  int power = 0;

  // Getting the input from the user

  cout << " Please enter the number ";

  cin>> number;

  cout << " Please enter the power number ";

  cin>> power;

  cout << "\n The Power number is : "<<pow(number,power);

  getch();

  return 0;

}

int pow(int n,int p)

{

   int n1=n;

   return pow1(n,p,n1);

 

}

int pow1(int n,int p,int n1)// It is a loop(Recursive call)

{

    

     if(p==1)

        return n1;

       n1=n1*n;

       p = p-1;

    return pow1(n,p,n1);

 

}

Output:

Lecture 150

Lecture 150

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void fun();  // Prototype    

main ()

{

   cout<<"It is return message. \n";

   fun();

   cout<<"\n --------------------------- \n";

   cout<<"It would return nothing : \n ";       

   void fun();

  getch();

  return 0;

}

void fun()

{

  cout<<"\n Hello ......... : ";    

}

Output:

Lecture 149

Lecture 149

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int fun();  // Prototype    

char fun1();

main ()

{

  cout<<"\tCharacter \n";

  cout<<fun1();

  cout<<"\n\tInteger \n";

  cout<<fun();

  getch();

  return 0;

}

int fun()

{

 char ch;

 cout<<"Enter any alphabet : ";    

 cin>>ch;

 if(ch>=65 && ch<=90)

   return ch;

 else

   return ch+32;  

}

char fun1()

{

 char ch;

 cout<<"Enter any alphabet : ";    

 cin>>ch;

 if(ch>=65 && ch<=90)

   return ch;

 else

   return ch+32;  

}

Output:

Lecture 148

Lecture 148

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void  italy();

void  brazil();

void  argentina();   // Prototype 

main ()

{

  cout<<"\n I am in main";

  italy();

  cout<<"\n I am back in main";

  getch();

  return 0;

}

void  italy()

{

  cout<<"\n I am in italy";

  brazil();

    cout<<"\n I am back in italy";

}

void  brazil()

{

  cout<<"\n I am in brazil";

  argentina();

  cout<<"\n I am back in brazil";

}

void  argentina()

{

  cout<<"\n I am in argentina";

  cout<<"\n __________________";

}

Output:

Lecture 147

Lecture 147

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

void  italy();

void  brazil();

void  argentina();   // Prototype 

main ()

{

  cout<<"\n I am in main";

  italy();

  brazil();

  argentina();

  getch();

  return 0;

}

void  italy()

{

  cout<<"\n I am in italy";

}

void  brazil()

{

  cout<<"\n I am in brazil";

}

void  argentina()

{

  cout<<"\n I am in argentina";

}

Output:

Lecture 146

Lecture 146

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int isEven(int);   // Prototype 

main ()

{

   int i ;

  // Getting the input from the user

  cout<< " Please enter the number " ;

  cin >> i ;

  cout<< " Zero is Even and One is odd \n" ;

  cout << " Even or Odd : " << isEven(i);

  getch();

  return 0;

}

int isEven(int n){  return n%2; }

Output:

Lecture 145

Lecture 145

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int pow(int,int);    // Prototype 

main ()

{

  int number = 0;

  int power = 0;

  // Getting the input from the user

  cout << " Please enter the number ";

  cin>> number;

  cout << " Please enter the power number ";

  cin>> power;

  cout << "\n The Power number is : "<<pow(number,power);

  getch();

  return 0;

}

int pow(int n,int p)

{

   int n1=n;

   while(p!=0)

   {

     p = p-1;

     if(p==0)

          break;

     n1=n1*n;

   }

   return n1;

  

}

Output:

Lecture 144

                Lecture 144

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int fac(int);    // Prototype 

main ()

{

  int number = 0;

  // Getting the input from the user

  cout << " Please enter the number to calculate the factorial ";

  cin>> number;

  cout << "\n The factorial number is : "<<fac(number);

  getch();

  return 0;

}

int fac(int n)

{

   if(n==0) return 1;

   if(n>0)  return fac(n-1)*n;   

}

Output:

Lecture 143

                Lecture 143

//Procedures and Functions

//Code:

#include <iostream>

#include <conio.h>

using namespace std;

int square(int);    // Prototype 

main ()

{

  int result = 0;

  int number = 0;

  // Getting the input from the user

  cout << " Please enter the number to calculate the square ";

  cin>> number;

  result = square(number);

  cout << "\n The square number is : "<<  result;

  getch();

  return 0;

}

int square(int n)

{

   return n*n;   

}
Output: