#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void main()
{
int unit=3;
int reading,previous,current,consumed,bill;
cout<<"enter your meter no";
cin>>reading;
cout<<"enter previous redaing of meter";
cin>>previous;
cout<<"enter current reading of meter";
cin>>current;
consumed=current-previous;
cout<<"units used in this month="<<consumed<<endl;
bill=consumed*unit;
cout<<"total bill="<<bill<<"Rs";
 
 
	getch();
 
	closegraph();
 
 
}

#include<stdio.h>
#include<conio.h>
#include<iostream>
#include<windows.h>
 
using namespace std;
 
int main()
{
int unit=3;
int reading,previous,current,consumed,bill;
 
      cout<< "Enter your meter Number:\a";
       cin>>reading;
      cout<<"Enter previous redaing of meter:\a";
       cin>>previous;
      cout<<"Enter current reading of meter:\a";
      cin>>current;
     consumed=current-previous;
      cout<<"Units used in this month="<<consumed<<endl;
      bill=consumed*unit;
      cout<<"Total bill="<<bill<<"Rs";
 
 
	getch();
 
	return 0;
 
 
}

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<graphics.h>
#include<iostream.h>
void main( )
 
{
	int gd = DETECT, gm, maxx, maxy;
	initgraph ( &gd, &gm, "c:\\tc\\bgi" ) ;
	maxx = getmaxx( ) ;
	maxy = getmaxy( ) ;
	rectangle ( 0, 0, maxx, maxy ) ;
	settextstyle(0,0,3);
	setcolor ( 10 ) ;
 
       outtextxy ( 250,50, "WAPDA" ) ;
       settextstyle(0,0,2);
	outtextxy (270,80,"LESCO");
	settextstyle (0,0,1);
	outtextxy(100,120,"METER NO");
settextstyle(0,0,2);
outtextxy(400,200,"SAVE ENERGY");
outtextxy(385,230,"SAVE PAKISTAN");
 
	getch ();
	closegraph();
	}