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.