C Program to Print Alternate Using Array

# include<stdio.h>
# include<conio.h>
void main()
{
 int arr[10];
 int i,j,temp;
 clrscr();
 for(i=0;i<10;i++)
 scanf("%d",&arr[i]);
 for(i=0;i<10;i+=2)
 printf("%d ",arr[i]) ;
 getch();
}

C Program print alternate element of an array

 /*C Program to print alternate element of an array*/
# include<stdio.h>
# include<conio.h>

void main()
{
int arr[10];
int i,j,temp;
clrscr();
for(i=0;i<10;i++)
scanf("%d",&arr[i]);
for(i=0;i<10;i+=2)
printf("%d ",arr[i]) ;
getch();
}

C Program Accept 10 numbers and no. to search, print its occurrence Using Array

/* Accept 10 numbers and no. to search, print its occurence
 Write a program to accept 10 no’s  and a number to search and print how many times it occurs in array */

# include<stdio.h>
# include<conio.h>

void main()
{
 int arr[10];
 int i,cnt=0,tosearch;
 clrscr();
 /* accepting an array*/
 for(i=0;i<10;i++)
  {
   printf("\n Enter %d number-",i);
   scanf("%d",&arr[i]);
   }
 printf("\nEnter a number to be search-");
 scanf("%d",&tosearch);
 for(i=0;i<10;i++)
 {
  if(arr[i]==tosearch)
    cnt++;
 }
 printf("\n Number occurs %d times",cnt);
 getch();
}

Friend Function Using C++

#include<iostream.h>

class Sample

{

int a;

int b;

public:

void setvalue()

{

a=25;

b=40;

}

friend int avg(Sample s);

};

int avg(Sample s)

{

return(s.a+s.b)/2;

}

Void main()

{

Sample x;

x.setvalue();

cout<<avg(x);

}

************************************

Friend function

With the use of a friend function we can access the private data of a class.

class Abc

{

….

….

public:

….

friend void xyz();/declaration

};

Characteristics of friend function

>It is not in the scope of the class to which it has been declared 

>Since it is not in the scope of the class,it cannot be called using the object of that class

>It can be invoked like a normal function without the help of any object

>But we cannot access the member names directly & has to use an object name & dot operator

 (e.g. A.x)

>Usually it has the objects as arguments

C++ program which reads a lowercase letter and print equivalent uppercase letter

#include<iostream.h>
void main()
{

  clrscr();
  char s1,s2;
  cout<<"Enter The lower case charecter\n";
  cin>>s1;
  s2=s1-32;
  cout<<"\n upper case letter of " <<s1<<" is "<<s2;
   getch();
}

Example of Local Variable Using C++

1st example:::::::---------
#include<iostream.h>
  void function1()
 {
  int x;  
  x=10;
  cout<<"\n" <<x;
 }
void function2()
{
int x=34;
cout<<"\n" <<x;
}
void main()
{
       clrscr();
       function1();
       function2();

}

2nd example:::::::---------
#include<iostream.h>
void main()
{
   clrscr();
   int x =10        
   if(x==10)
    {
         int x; /*this x hides outer x*/
         x=77;
        cout<<"Inner x : " <<x;
     }
  cout<<"\n Outer x : "  <<x;
}

C++ Program prints the number 10 ten times Using static variable

#include<iostream.h>
void function()
{
static int k=10;
 cout<<k<<endl ;
 k++;
}
void main()
{
      clrscr();
     int i=10;
     for(i=0;i<10;i++)
     {
       function();
     }
}