• On March 5, 2019
• By Karmehavannan
• 1 Comment
• Categories: Calculations
• Tags: C examples, C language, operator

C program to Electricity bill calculation using function

C program to Electricity bill calculation using function

In this tutorial, we will discuss the C program to Electricity bill calculation using the function

In this article, we will discuss how to calculate the electricity bill in the C programming language using the function

We can calculate monthly electric power usage in many ways in the C programming language

In this tutorial, I have written two programs for calculating electricity bill in C language using the function.

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

/*1 - 100 unit - 1.5/= 
101-200 unit - 2/= 
201-300 unit - 3/= 
above 300 - 4/=*/

In my previous post, I have explained  to the C program to calculate  the electricity bill

However, in this program, we embed the logic of the Calculate electricity bill program in the function

Once this program received the units and it will calculate the electricity bill and cost per month

After receiving the input from the user, it is stored in the variable of the unit and then program calculate electricity bill

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 50 units, calculates the total amount of usage =unit*1.50
• If the unit consumed between 50 to 150 units, calculates the total amount of usage =(50*1.5)+(unit-50)*2)
• If  the unit consumed between 150 to 250 units ,calculates total amount of usage =(50*1.5)+(100*2)+(unit-150)*3
• If the unit consumed above 250 units ,calculates total amount of usage =(50*1.5)+(100*2)+(100)*3+(unit-250)*4
• No additional charge

Calculate electricity bill without && operator

Program 1

#include <stdio.h>
#include <stdlib.h>
int calc_Electricity();//function prototype
int main()
{
    //rates apply
    // 1- 50 units - 1.50
    //51- 150 units - 2.00
    //101 - 250 units - 3.00
    //above 251  units - 4.00
    int unit=0;

    printf("Enter total mun its consumed\n");
    scanf("%d",&unit);//Reads input from user and store in variable unit
    calc_Electricity(unit);//function call
    return 0;
}
int calc_Electricity(int unit){//function definition
    double amount;
    if(unit<=50)
    {//below 50 units
        amount=unit*1.50;

    }
    else if(unit<=150)
    {//below 150 units
        amount=((50*1.5)+(unit-50)*2.00);
    }
    else if((unit<=250)){//below 250 units
        amount=(50*1.5)+((150-50)*2.00)+(unit-150)*3.00;
    }
    else{//above 250 units
        amount=(50*1.5)+((150-50)*2.00)+((250-150)*3.00)+(unit-250)*4;

    }
    printf("Electricity bill = Rs. %.2f",amount);
      //display the output on the screen
}

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

Enter total units consumed
275
Electricity bill = Rs.675.00

Program 2

Calculate electricity bill with && operator

#include <stdio.h>
#include <stdlib.h>
int calc_Electricity();//function prototype
int main()
{
    //rates apply
    // 1- 50 units - 1.50
    //51- 150 units - 2.00
    //101 - 250 units - 3.00
    //above 251  units - 4.00
    int unit=0;

    printf("Enter total units consumed\n");
    scanf("%d",&unit);//Reads input from user and store in variable unit
    calc_Electricity(unit);//function call
    return 0;
}
int calc_Electricity(int unit){//function definition
    double amount;
    if((unit>=1)&&(unit<=50))//between 1 - 50 units
    {
        amount=unit*1.50;

    }
    else if((unit>50)&&(unit<=150))//between 50  150 units
    {
        amount=((50*1.5)+(unit-50)*2.00);
    }
    else if((unit>150)&&(unit<=250)){//between 150 -  250 units
        amount=(50*1.5)+((150-50)*2.00)+(unit-150)*3.00;
    }
    else if(unit>250){//above 250 units
        amount=(50*1.5)+((150-50)*2.00)+((250-150)*3.00)+(unit-250)*4;

    }
    else{
            printf("No usage ");
        amount=0;
    }
    printf("Electricity bill = Rs. %.2f",amount);

}

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

Enter total units consumed
255
Electricity bill = Rs.595.00

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