Conditional statement019

Write a ‘C’ program to calculate the electricity bill using if..elseif, as per the following details


Given the number of units consumed, unit charges are as follows:
i)    For first 50 units Rs. 0.50/unit
ii)   For next 100 units Rs. 0.75/unit
iii)  For next 100 units Rs. 1.20/unit
iv)  For unit above 250 Rs. 1.50/unit


Add fuel surcharge 20% and Govt. Tax 10% on bill to calculate the total bill.



#include<stdio.h>
#include<conio.h>
void main ( )
{
        int         unit;
        float      cost, fuel, tax;
     
        clrscr ( );
        printf ("\n Enter the number of unit consumed..:"); scanf ("%d",&unit);
     
        if (unit <= 50)
        {                  
                 cost = unit *.50;
        }              
        else if (unit <= 150)
        {                          
                 unit = unit - 50;
                 cost = 50 *.50 + unit * .75;
        }                          
        else if (unit <= 250)
        {                                  
                 unit = unit - 150;
                 cost = 50 * .50 + 100 *.75 + unit * 1.20;
        }                                  
        else            
        {                      
                 unit = unit - 250;
                 cost = 50 * .50 + 100 * .75 + 100 * 1.20 + unit * 1.50;
        }

        fuel = cost * 20 / 100;
        tax = cost * 10 / 100;
         
        printf ("\n Gross amount = %.2f",cost);
        printf ("\n Fuel charges = %.2f",fuel);
        printf ("\n Tax = %.2f",tax);
        printf ("\n_________________________\n");
        printf ("\n Gross amount = %.2f",cost + fuel + tax);
getch( );
}

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