If units of electricity used in a month are less than 200 the unit rate is 3.0 if units are 200 or greater than 200 the unit rate is 3.50 and additional charge of 10% of units are included.

#include<stdio.h>

#include<conio.h>

int main()

{

clrscr();

int cr,pr,unit;

float bill;

printf(“Enter Current Reading: “);

scanf(“%d”,&cr);

printf(“Enter Previous Reading: “);

scanf(“%d”,&pr);

unit=cr-pr;

printf(“Total Units of Electricity used in a Month: %d\n”,unit);

if(unit>=200)

{

bill=(unit*3.50)+(unit*0.1);

printf(“The bill is %0.2f”,bill);

}

if(unit<200)

{

bill=unit*3.0;

printf(“The bill is %0.2f”,bill);

}

getch();

return 0;

}