# C++ program to calculate the electricity bill of consumed units by user

In this post, we will write a C++ program to calculate the electricity bill of consumed units by the user. user will enter the number of units and the price per unit and the program will print the electricity bill consumed by the user.

## C++ program to calculate the electricity bill.

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

int main(void)
{

int units,cunits,punits;
float bill;

std::cout<<"Enter the current reading = ";
std::cin>>cunits;
std::cout<<"Enter the previous reading = ";
std::cin>>punits;

units = cunits - punits;

if(units < 300)
bill = 3.0*units;
if(units > 300 && units <= 400)
bill = ((3.5*units) + (units*0.5/100.0));
if(units > 400 && units <= 500)
bill = ((4.5*units) + (units*0.7/100.0));
if(units > 500)
bill = ((5.0*units) + (units*0.9/100.0));

std::cout<<"The electricity bill is = "<<bill;

return 0;
}

```

### Output

```Enter the current reading = 600
Enter the previous reading = 295
The electricity bill is = 1069.025024
```