c programs

1. C Language Program
Write a C program to input electricity unit charge and calculate the total electricity bill according to
the given condition:
For first 50 units Rs. 0.50/unit
For next 100 units Rs. 0.75/unit
For next 100 units Rs. 1.20/unit
For unit above 250 Rs. 1.50/unit
An additional surcharge of 20% is added to the bill.
How to calculate electricity bill using if else in C programming. Program to find electricity bill using if
else in C. Logic to find net electricity bill in C program.
/**
* C program to calculate total electricitybill
*/
#include <stdio.h>
int main()
{
int unit;
floatamt, total_amt,sur_charge;
/*
* Read unitconsumedfromuser
*/
printf("Entertotal unitsconsumed:");
scanf("%d",&unit);
/*
* Calculate electricitybillaccordingtogivenconditions
*/
if(unit<= 50)
{
amt = unit* 0.50;
}
else if(unit<= 150)
{
amt = 25 + ((unit-50)*0.75);
}
else if(unit<= 250)
{
amt = 100 + ((unit-150)*1.20);
}
else
{
amt = 220 + ((unit-250)*1.50);
}
/*
* Calculate total electricitybill
* afteraddingsurcharge
*/
sur_charge = amt * 0.20;
total_amt = amt + sur_charge;
printf("ElectricityBill =Rs. %.2f",total_amt);
return0;

2. }
to display the larger one out of the three given
unequal numbers
#include <stdio.h>
intmain()
{
double n1,n2, n3;
printf("Enterthree numbers:");
scanf("%lf %lf %lf",&n1, &n2, &n3);
if( n1>=n2 && n1>=n3 )
printf("%.2f isthe largestnumber.",n1);
if( n2>=n1 && n2>=n3 )
printf("%.2f isthe largestnumber.",n2);
if( n3>=n1 && n3>=n2 )
printf("%.2f isthe largestnumber.",n3);
return0;
}

3. Write a Program to inputname,classand marksin five Subjectslike English,math,Nepali,account,
Computerscience FindTotal,percentage,division,remarksThe conditionof divisionis.. :Percentage /
Division:per>= 75 / Distinction,per>=60 AND per<75 / Firstper> = 45 AND per<60 / Second,per>=
35 ANDper <45 / Third and Below-35/Fail.
#include <stdio.h>
#include <conio.h>
voidmain()
{
char name [50];
intclas, eng,nep,math,acc, cscience,total;
floatper;
printf ("Enterthe name of student:");
scanf ("% s",& name);
printf ("Enterthe class:");
scanf ("% d",& clas);
printf ("Enterthe marksin English,Nepali,Math,AccountandComputerScience.");
scanf ("% d%d% d%d% d",& eng,& nep,& math,& acc, & cscience);
printf ("t nName =% s",name);
printf ("t nClass=% d", clas);
printf ("nEnglish= t%d", eng);
printf ("nNepali = t% d",nep);
printf ("nMath = t%d", math);
printf ("nAccount= t%d", acc);
printf ("nComputerScience = t%d", cscience);
printf ("n ===============================");
total = eng+ nep+ math + acc + cscience;
per= total / 5;
printf ("Total = t% d",total);
printf ("Percentage =t% f",per);
if (eng>= 35 && nep> = 35 && math> = 35 && acc> = 35 && cscience>= 35)
printf ("nRemarks:PASSED");
else
printf ("nRemarks:FAILED");
if (per>= 75)
printf ("Division:Distnction");
else if (per>= 60 && per<75)
printf ("Division:First");
else if (per>= 45 && per<60)
printf ("Division:Second");
else if (per>= 35 && per<45)
printf ("Division:Third");
else
printf ("Division:Fail");
getch();
}

4. Program to calculate simple interest
/*
* C program to calculate simple interest
*/
#include <stdio.h>
int main() {
float principle, rate, time, simpleInterest;
/*
* Take Principle, Rate of interest and
* Time as input from user.
*/
printf("Enter Principle Amountn");
scanf("%f", &principle);
printf("Enter Rate of Interestn");
scanf("%f", &rate);
printf("Enter Time of Loann");
scanf("%f", &time);
/*
* Simple Interest = (Principle X Rate X Time)/100;
*/
simpleInterest = (principle * rate * time)/100;
printf("Simple Interest = %.2f", simpleInterest);
return 0;
}

5. to determine whether a given number is prime number or not
#include <stdio.h>
intmain()
{
int n,i, flag= 0;
printf("Enterapositive integer:");
scanf("%d",&n);
for(i=2;i<=n/2; ++i)
{
//conditionfornonprime number
if(n%i==0)
{
flag=1;
break;
}
}
if (flag==0)
printf("%disaprime number.",n);
else
printf("%disnotaprime number.",n);
return0;
}