Program Of Unary Operator Overloading In C++

#include<iostream.h>
#include<conio.h>
 

class box
 

{
 

    private:
 

    int a;
 

    public:
  

  void getdata(int x)
 

    {
 

      a= x;   
 

    }
  

  void operator ++()
 

    {
 

    a++;
 

    }
 

    void display()
 

    {
     

 cout<<"\n a="<<a;   
 

    }
 

}
 

main()
 

{
 

clrscr();
 

box b1;
 

int x;
 

cout<<"Enter x=";
 

cin>>x;
 

b1.getdata(x);
 

++b1;
 

++b1;
 

++b1;
 

++b1;
 

b1.display();
 

getch();
 

}

Program Of GET PUT Function In C

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

main()
 

{
 

clrscr();
 

FILE *f1,*f2,*f3;
 

int i,a,m,n;
 

printf("Enter No. Of Char");
 

scanf("%d",&m);
 

printf("\n Contens Of Main File=");
 

f1=fopen("Main","w"); 

for(i=1;i<=m;i++)
 

{
 

scanf("%d",&n);
 

if(n==-1)
 

break;
 

putw(n,f1);
 

}
 

fclose(f1);
 

f1=fopen("Main","r");
 

f2=fopen("ODD","w");
 

f3=fopen("EVEN","w");
 

a=getw(f1);
 

while(a!=EOF)
 

{
 

if(a%2==0)
 

{
 

putw(a,f3);
 

}
 

else
 

{
putw(a,f2);
 

}
 

a=getw(f1);
 

} 

fclose(f1);
 

fclose(f2);
 

fclose(f3);
 

f2=fopen("ODD","r");
 

f3=fopen("EVEN","r");
 

printf("Content of ODD File \n");
 

while(a=getw(f2)!=EOF) 

{
 

printf("%d\n",a);
 

}
 

printf("Content Of Even File\n ");
 

while(a=getw(f3)!=EOF)
 

{
 

printf("%d\n",a);
 

}
 

fclose(f2);
 

fclose(f3);
 

getch();
 

}