Cpp program to calculate electricity bill

Cpp program to calculate electricity bill

In this tutorial, we will discuss the Cpp program to calculate electricity bill

In this post, we will learn how to calculate electricity bill using if condition in the C++ programming language

We can calculate monthly electric power usage in many ways.

In this tutorial, we will write two programs calculating electricity bill in C++ language.

Before we write a program to calculate the electricity bill we must understand electricity charges and  rates.

/*1 - 100 unit - 5/= 
101-200 unit - 7/= 
201-300 unit - 10/= 
above 300 - 15/=*/

This program can have the following common procedures for completion of this program

• Declare total unit consumed by the customer using the variable unit.
• If the unit consumed less or equal to 100 units, calculates the total amount of usage =unit*5
• If unit consumed between 100 to 200 units, calculates the total amount of usage =(100*5)+(unit-100)*7)
• If  unit consumed between 200 to 300 units ,calculates total amount of usage =100*5)+(100*7)+(unit-200)*10
• If unit consumed above 300 units ,calculates total amount of usage =(100*5)+(100*7)+(100*10)+(unit-300)*15
• No additional charge

Electricity bill calculation – using normal method

program 1

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int unit=315; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=*/
      if(unit<=100){//when this statement is true
            cout<<"Bill amount is: ";
    cout<<unit*5;//this statement is Executed otherwise
}
else if(unit<=200){//when this statement is true
        cout<<"Bill amount is: ";
    cout<<(100*5)+(unit-100)*7;//this statement is Executed otherwise
}
else if(unit<=300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(unit-200)*10;//this statement is Executed otherwise
}
else if(unit>300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(100*10)+(unit-300)*15;//this statement is Executed otherwise
}
else{//when all statements are false
    cout<<"Bill amount is: ";
    cout<<"No value";//this statement is Executed
}
getch();
    return 0;
}

When the above code is  executed, it produces the following results

Bill amount is 2425

Electricity bill calculation – using take input from the user

Program 2

int main()
{
    int unit; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=*/      cout<<"Enter the unit of usage: ";
      cin>>unit;

      if(unit<=100){//when this statement is true
            cout<<"Bill amount is: ";
    cout<<unit*5;//this statement is Executed otherwise
}
else if(unit<=200){//when this statement is true
        cout<<"Bill amount is: ";
    cout<<(100*5)+(unit-100)*7;//this statement is Executed otherwise
}
else if(unit<=300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(unit-200)*10;//this statement is Executed otherwise
}
else if(unit>300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(100*10)+(unit-300)*15;//this statement is Executed otherwise
}
else{//when all statements are false
    cout<<"Bill amount is: ";
    cout<<"No value";//this statement is Executed
}
getch();
    return 0;
}

When the above code is  executed, it produces the following results

Enter the unit of usage: 350
Bill amount is: 2950

Electricity bill calculation – using & operator

program 3

#include <iostream>
#include <conio.h>
using namespace std;

int main()
{
    int unit; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=*/      cout<<"Enter the unit of usage";
      cin>>unit;

      if(unit>0 && unit<=100){//when this statement is true
            cout<<"Bill amount is: ";
    cout<<unit*5;//this statement is Executed otherwise
}
else if(unit>100 && unit<=200){//when this statement is true
        cout<<"Bill amount is: ";
    cout<<(100*5)+(unit-100)*7;//this statement is Executed otherwise
}
else if( unit>200 && unit<=300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(unit-200)*10;//this statement is Executed otherwise
}
else if(unit>300){//when this statement is true
    cout<<"Bill amount is: ";
    cout<<(100*5)+(100*7)+(100*10)+(unit-300)*15;//this statement is Executed otherwise
}
else{//when all statements are false
    cout<<"Bill amount is: ";
    cout<<"No value";//this statement is Executed
}
getch();
    return 0;
}

When the above code is  executed, it produces the following results

Enter the unit of usage: 350
Bill amount is: 2950

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