Project
// Calculator.java
package myCalculator;
import java.io.IOException;
import java.util.InputMismatchException;
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) throws IOException {
Scanner s = new Scanner(System.in);
while (true) {
System.out.println("which operation do you want to perform? input:");
System.out.println("1. for addition");
System.out.println("2. for Subtraction");
System.out.println("3. for multiplication");
System.out.println("4. for division");
System.out.println("5. for getting power");
System.out.println("6. for Square root");
System.out.println("7. for nth root");
System.out.println("8. for common logarithmic value");
System.out.println("9. for natural logarithmic value");
System.out.println("10. for sine vale");
System.out.println("11. for Inverse sine");
System.out.println("12. for cosine values");
System.out.println("13. for inverse Cosine");
System.out.println("14. for Tangent values");
System.out.println("15. for Inverse tangent");
System.out.println("16. for storing a number");
System.out.println("17. for recovering the stored value");
System.out.println("18. for converting a Decimal into binary number");
System.out.println("19. for converting Binary number into Decimal");
System.out.println("20. for Calculating SIP");
int input = s.nextInt(); // user choice
if (input == 1) { //according to user input
try {
Operation opt = new Operation(); //creating obj of Operation Class
opt.add(); //and calling that particular method
} catch (InputMismatchException e) { //surrounding it with try catch block for exception handling
System.out.println("Input type incorrect");
}
}
else if (input == 2) {
try {
Operation opt = new Operation();
opt.sub();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 3) {
try {
Operation opt = new Operation();
opt.mul();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}else if (input == 4) {
try{
Operation opt = new Operation();
opt.div();
}
catch (InputMismatchException e){
System.out.println("cannot divide by zero");
}
}
else if (input == 5) {
try {
Operation opt = new Operation();
opt.power();
} catch (InputMismatchException e) {
System.out.println("input type is incorrect ");
}
}
else if (input == 6) {
try {
Operation opt = new Operation();
opt.square();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 7) {
try {
Operation opt = new Operation();
opt.nRoot();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 8) {
try {
Operation opt = new Operation();
opt.log();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 9) {
try {
Operation opt = new Operation();
opt.nLog();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 10) {
try {
Operation opt = new Operation();
opt.sin();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 11) {
try {
Operation opt = new Operation();
opt.invSine();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 12) {
try {
Operation opt = new Operation();
opt.Cosine();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 13) {
try {
Operation opt = new Operation();
opt.invCos();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 14) {
try {
Operation opt = new Operation();
opt.tan();
} catch (InputMismatchException e ){
System.out.println("Input type incorrect");
}
}
else if (input == 15) {
try {
Operation opt = new Operation();
opt.invTan();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 16) {
try {
Operation opt = new Operation();
opt.store();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 17) {
try {
Operation opt = new Operation();
opt.recall();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 18) {
try {
Operation opt = new Operation();
opt.d2b();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 19) {
try {
Operation opt = new Operation();
opt.b2d();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}
else if (input == 20) {
try {
Operation opt = new Operation();
opt.sip();
} catch (InputMismatchException e) {
System.out.println("Input type incorrect");
}
}else
System.out.println("invalid input! choose correct Option");
continue;
}
}
}
//Operation.java
package myCalculator;
import java.io.*;
import java.util.Scanner;
public class Operation {
Scanner s= new Scanner(System.in); //scanner for taking input from user
public void add() throws IOException { // method for addition , as we have created object of FileWriter class it should throw IOException
System.out.println("Enter the first value"); // asking for first value
double a= s.nextInt();
System.out.println("Enter the Second value"); // asking for second value
double b= s.nextInt();
double c=a+b; // adding those two values and assign to c
System.out.println(a+"+"+b+"="+ c); //printing answer
FileWriter f= new FileWriter("CalculationsHistory.txt", true); // object of FileWriter class for bufferWrite
BufferedWriter bw= new BufferedWriter(f); // object of bufferedWriter
bw.write(String.format("%f+%f= %f",a,b,c)); //storing the values in above mentioned txt file
bw.newLine(); // moving on next line
bw.close(); // closing bufferedWriter
}
public void sub() throws IOException { //method for subtraction
System.out.println("Enter the first value");
double a= s.nextInt();
System.out.println("Enter the Second value");
double b= s.nextInt();
double c=a-b;
System.out.println(a+"-"+b+"="+ c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("%f-%f= %f",a,b,c));
bw.newLine();
bw.close();
}
public void mul() throws IOException { //method for multiplication
System.out.println("Enter the first value");
double a= s.nextInt();
System.out.println("Enter the Second value");
double b= s.nextInt();
double c=a*b;
System.out.println(a+"X"+b+"="+ c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("%f*%f= %f",a,b,c));
bw.newLine();
bw.close();
}
public void div() throws IOException { //method for division
System.out.println("Enter the first value");
double a= s.nextInt();
System.out.println("Enter the Second value");
double b= s.nextInt();
double c=a/b;
System.out.println(a+"/"+b+"="+ c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("%f/%f= %f",a,b,c));
bw.newLine();
bw.close();
}
public void power() throws IOException { // method for power
System.out.println("Enter the first value");
double a= s.nextInt();
System.out.println("Enter the number of power");
double b= s.nextInt();
double c=Math.pow(a,b); // for power using power method from java.math library
System.out.println(a+"^"+b+"= "+ c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("%f^%f= %f",a,b,c));
bw.newLine();
bw.close();
}
public void square() throws IOException { // method for squaring
System.out.println("Enter the value");
double a= s.nextInt();
double b= Math.sqrt(a); // using sqrt method from java.math library for square root
System.out.println("Square root of"+ a + "=" +b);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Square root of %f= %f",a,b));
bw.newLine();
bw.close();
}
public void nRoot() throws IOException {
System.out.println("Enter the value");
double a= s.nextInt();
System.out.println("Enter the number of root");
double b= s.nextInt();
double c=Math.pow(a,1/b); // for nth root using power method as 1/nth power gives us nth root
System.out.println(b+"th root of "+a +"is "+ c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("%fth root of %f is %f",b,a,c));
bw.newLine();
bw.close();
}
public void log() throws IOException { // method for calculating common log i.e log to the base 10
System.out.println("Enter the value");
double a= s.nextInt();
double c= Math.log10(a); // using log10 method from java.math library for common log
System.out.println("logarithmic value of "+a+" =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("logarithmic value of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void nLog() throws IOException { // method for natural log i.e log to the base e
System.out.println("Enter the value");
double a= s.nextInt();
double c= Math.log(a); // using log method for natural log from java.math library
System.out.println("Natural logarithmic value of "+a+" =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Natural logarithmic value of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void sin() throws IOException { // method for calculating sin value
System.out.println("Enter the value of theta "); // user input of theta in radian
double a = s.nextInt();
double c = Math.sin(a); // using sin() method of java.Math library for calculating Sine value
System.out.println("Sine of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Sine of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void invSine() throws IOException { //method for inverse sin
System.out.println("Enter the value");
double a = s.nextInt();
double c = Math.asin(a); // for Sine inverse using asin() method of java.Math library and the answer will be in radian
System.out.println(" Sine inverse of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Sine inverse of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void Cosine() throws IOException { // method for Cosine value
System.out.println("Enter the value");
double a = s.nextInt();
double c = Math.cos(a); // using cos() method of java.Math for Cosine Calculation
System.out.println(" Cosine of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Cosine of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void invCos() throws IOException { //method for calculating inverse Cosine
System.out.println("Enter the value");
double a = s.nextInt();
double c = Math.acos(a); //using acos() method of java.Math for inverse Cosine Calculation
System.out.println(" Cos inverse of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Cos inverse of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void tan() throws IOException { // method for Tangent Calculation
System.out.println("Enter the value");
double a = s.nextInt();
double c = Math.tan(a); // using tan() method of java.Math for Tangent Calculation
System.out.println(" Tangent of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Tangent of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void invTan() throws IOException { // method for inverse Tangent calculation
System.out.println("Enter the value");
double a = s.nextInt();
double c = Math.atan(a); // using atan() method of java.Math for inverse Tangent Calculation
System.out.println(" tan inverse of " + a + " =" + c);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("tan inverse of %f = %f",a,c));
bw.newLine();
bw.close();
}
public void store() throws IOException { // method for Storing the value
System.out.println("Enter th value to store");
double a = s.nextInt(); //input of value to be stored
FileWriter fw= new FileWriter("Myfile.txt", true); // this fw of FileWriter store the value in a file Myfile.txt
BufferedWriter b= new BufferedWriter(fw);
b.write(String.format("%f",a));
b.close();
System.out.println(" your value stored successfully");
// f object of FileWriter will store our operation in CalculationHistory.txt file
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Your stored value is %f",a));
bw.newLine();
bw.close();
}
public void recall() throws IOException { // method for recalling stored value
String a;
FileReader fr= new FileReader("Myfile.txt"); // fr object of FileReader
BufferedReader br= new BufferedReader(fr); // creating br object of file reader and passing fr into it
a=br.readLine(); // thus will read the stored value from MyFile.txt
System.out.println(a);
br.close();
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Your recalled value is %s",a));
bw.newLine();
bw.close();
}
public void d2b() throws IOException { // method for decimal to binary number calculation
System.out.println("Enter the Decimal number");
int a= s.nextInt(); // user decimal input
int b= a; // assigning a to b
String bin=""; // declaring binary value initially be empty
while (b>0){ //
int rem= b%2; // getting remainder by dividing b by 2
//initially value of b will be inputted value but later on it will change below operation tales place in loop
b= b/2; // getting quotient of b/2 and assign to b for above operation
bin= rem+bin; // collecting remainder and binary value which is initially empty later it will change as this operation
}
System.out.println("Binary value of "+ a+ " is "+ bin);
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Binary value of %d is %s",a,bin));
bw.newLine();
bw.close();
}
public void b2d() throws IOException { //binary to decimal calculation method
System.out.println("Enter the binary number");
int a= s.nextInt(); // user input of binary value
int dec=0; // initially decimal value be 0
int b= a; // assigning a to b because we will need original inputted value further
int i= 0; // i is power's number initially be 0
while (b>0){
int rem1= b%10; // getting remainder of b/10
b= b/10; // assigning quotient of b/10 to b
dec= dec+rem1*(int) Math.pow(2,i++); // adding (remainder*2^i) and decimal which is in initially 0
// and assigning it to decimal
}
System.out.println("Decimal number of "+a+ " is "+dec );
FileWriter f= new FileWriter("CalculationsHistory.txt", true);
BufferedWriter bw= new BufferedWriter(f);
bw.write(String.format("Decimal number of %d is %d",a,dec));
bw.newLine();
bw.close();
}
public void sip() throws IOException { // method for Systematic Investment Plan Calculation
System.out.println("input 1. for monthly SIP 2. for quarterly SIP 3. for annually SIP");
int sipChoice = s.nextInt(); // choice of user for monthly quarterly and annually SIP
if (sipChoice == 1) { //for monthly
System.out.println("Enter investment amount per month");
double invAm = s.nextInt(); // investment amount to be payed per month
System.out.println("Enter monthly interest rate");
double mIntRate = s.nextInt(); // rate of interest per month i.e annual interest/12
System.out.println("Enter number of months for which SIP required ");
int numM = s.nextInt(); // number of months which SIP required
double rAmt = 0; // initially return amount will be 0
for (int i = 0; i < numM; i++) { // loop for getting compound interest
// interest per month = investment per month (returned amount of prevised month + investment to be done on that month)* monthly rate
double intPm = (rAmt + invAm) * mIntRate / 100;
rAmt = invAm + rAmt + intPm; //return value for that a month = investment amount + prevised month returned value + interest of that month
System.out.println("month-" + (i + 1) + " investment amount:" + invAm + "" +
" Monthly interest rate:" + mIntRate + " return Value:" + rAmt); // printing SIP
FileWriter f = new FileWriter("CalculationsHistory.txt", true);
BufferedWriter b = new BufferedWriter(f);
b.write(String.format("month-%d investment amount:%f Monthly interest rate:%f return Value:%f", (i + 1), invAm, mIntRate, rAmt));
b.newLine();
b.close();
}
}
if (sipChoice == 2) { // for Quarterly SIP
System.out.println("Enter investment amount per Quarter");
double invAq = s.nextInt();
System.out.println("Enter quarterly interest rate");
double qIntRate = s.nextInt(); //interest Rate per Quarter i.e annual interest rate /4
System.out.println("Enter number of quarters ");
int numQ = s.nextInt(); //number of Quarters
double reAmt = 0; // initially return amount
for (int i = 0; i < numQ; i++) {
double intPq = (reAmt + invAq) * qIntRate / 100; //interest per quarter
reAmt = invAq + reAmt + intPq; // return amount after each month
System.out.println("month-" + (i + 1) + " investment amount:" + invAq + "" +
" Monthly interest rate:" + qIntRate + " return Value:" + reAmt);
FileWriter f = new FileWriter("CalculationsHistory.txt", true);
BufferedWriter b = new BufferedWriter(f);
b.write(String.format("month-%d investment amount:%f Monthly interest rate:%f return Value:%f", (i + 1), invAq, qIntRate, reAmt));
b.newLine();
b.close();
}
}
if (sipChoice == 3) {
System.out.println("Enter investment amount per Anum");
double invAa = s.nextInt(); // yearly investment amount
System.out.println("Enter annually interest rate");
double aIntRate = s.nextInt(); //annual interest rate
System.out.println("Enter number of years");
int numY = s.nextInt(); //number of Years
double retAmt = 0; // return amount initially 0
for (int i = 0; i < numY; i++) {
double intPa = (retAmt + invAa) * aIntRate / 100; //interest per year
retAmt = invAa + retAmt + intPa; //return amount after each year
System.out.println("month-" + (i + 1) + " investment amount:" + invAa + "" +
" Monthly interest rate:" + aIntRate + " return Value:" + retAmt);
FileWriter f = new FileWriter("CalculationsHistory.txt", true);
BufferedWriter b = new BufferedWriter(f);
b.write(String.format("month-%d investment amount:%f Monthly interest rate:%f return Value:%f", (i + 1), invAa, aIntRate, retAmt));
b.newLine();
b.close();
}
}
}
}