Write a C program that reads the customer number and power consumed and prints the amount to be paid by the customer.

An electric power distribution company charges its domestic consumers as follows

  Consumption   Rate of
  Units  Charge
  ------------------------------------------------------
  0-200       Rs.0.50 per unit
  201-400     Rs.100 plus Rs.0.65 per unit excess 200
  401-600     Rs.230 plus Rs.0.80 per unit excess of 400.
  -------------------------------------------------------

#include<stdio.h>
#include<conio.h>
void main()
{
int n, p;
float amount;
clrscr();
printf("Enter the customer number: ");
scanf("%d",&n);
printf("Enter the power consumed: ");
scanf("%d",&p);

 if(p>=0 && p<=200)
    amount=p*0.50;
 else if(p>200 && p<400)
    amount = 100+((p-200) * 0.65);
 else if(p>400 && p<=600)
    amount = 230 + ((p-400) * 0.80);
printf("Amount to be paid by customer no. %d is Rs.:%5.2f.",n,amount);

getch();
}

Output :

Enter the customer number: 1
Enter the power consumed: 100
Amount to be paid by customer no. 1 is Rs.:50.00.