Question

Write a calculator program that prompts the user with the following menu:

Add

Subtract

Multiply

Divide

Power

Root

Modulus

Upon receiving the user's selection, prompt the user for two numeric values and print the corresponding solution based on the user's menu selection. Ask the user if they would like to use the calculator again. If yes, display the calculator menu. otherwise exit the program.

EXAMPLE PROGRAM EXECUTION:

Add

Subtract

Multiply

Divide

Power

Root

Modulus

Please enter the number of the menu option that corresponds to the operation you'd like to perform: 7

Please enter the first value: 5

Please enter the second value: 3

5 % 3 = 2

Would you like to perform another calculation? Y

Add

Subtract

Multiply

Divide

Power

Root

Modulus

Please enter the number of the menu option that corresponds to the operation you'd like to perform: 2

Please enter the first value: 5

Please enter the second value: 3

5 - 3 = 2

Would you like to perform another calculation? N

THANK YOU! GOODBYE!

THIS IS WHAT I HAVE SO FAR BUT NOT WORKING :(

package homework02;

import java.util.Scanner;

/**

*

* @author Phpawn

*/

public class HOMEWORK02 {

/**

* @param args the command line arguments

*/

public static void main(String[] args) {

  

Scanner scan= new Scanner(System.in);

  

String result;

double formula,firstnumber = 0,secondnumber = 0;

  

do{

  

System.out.println("1.add\n 2.subtract\n 3.multiply\n 4.divide\n 5.power\n 6.root\n 7.modulus\n)");

System.out.println("Please enter the number of the menu option that corresponds to the operation you'd like to perform");

formula= scan.nextInt();

  

if(formula==1){

System.out.printf("%f + %f = %f",firstnumber,secondnumber,firstnumber+secondnumber);

}

else if (formula==2){

System.out.printf("%f - &f = %f",firstnumber,secondnumber,firstnumber-secondnumber);

}

else if (formula==3){

System.out.printf ("%f * %f = %f",firstnumber,secondnumber,firstnumber*secondnumber);

}

else if(formula==4){

System.out.printf("%f / %f = %f",firstnumber,secondnumber,firstnumber/secondnumber);

}

else if(formula==5){

System.out.printf("%f ^ %f = %f", firstnumber,secondnumber,Math.pow(firstnumber,secondnumber));

}

else if(formula==6){

System.out.printf("%f^1/%f = %f",firstnumber,secondnumber,Math.pow(firstnumber,1/secondnumber));

}

else if(formula==7){

System.out.printf("%f %% %f = %f",firstnumber,secondnumber,firstnumber%secondnumber);

  

}

  

System.out.println("Would you like to perform another operation");

result = scan.next();

}

while (result.equals("y"));

}

}

Answer 1

Hi

I have modified the code and working fine now and highlighted the code changes below.

HOMEWORK02.java

import java.util.Scanner;

public class HOMEWORK02 {
public static void main(String[] args) {
  
Scanner scan= new Scanner(System.in);
  
String result;
double formula,firstnumber = 0,secondnumber = 0;
  
do{
  
System.out.println("1.add\n 2.subtract\n 3.multiply\n 4.divide\n 5.power\n 6.root\n 7.modulus\n)");
System.out.println("Please enter the number of the menu option that corresponds to the operation you'd like to perform");
formula= scan.nextInt();
System.out.println("Please enter the first value: ");
firstnumber = scan.nextDouble();
System.out.println("Please enter the second value: ");
secondnumber = scan.nextDouble();
if(formula==1){
System.out.printf("%f + %f = %f",firstnumber,secondnumber,firstnumber+secondnumber);
}
else if (formula==2){
System.out.printf("%f - %f = %f",firstnumber,secondnumber,firstnumber-secondnumber);
}
else if (formula==3){
System.out.printf ("%f * %f = %f",firstnumber,secondnumber,firstnumber*secondnumber);
}
else if(formula==4){
System.out.printf("%f / %f = %f",firstnumber,secondnumber,firstnumber/secondnumber);
}
else if(formula==5){
System.out.printf("%f ^ %f = %f", firstnumber,secondnumber,Math.pow(firstnumber,secondnumber));
}
else if(formula==6){
System.out.printf("%f^1/%f = %f",firstnumber,secondnumber,Math.pow(firstnumber,1/secondnumber));
}
else if(formula==7){
System.out.printf("%f %% %f = %f",firstnumber,secondnumber,firstnumber%secondnumber);
}
System.out.println();
System.out.println("Would you like to perform another operation");
result = scan.next();
}
while (result.equals("y"));
}
}

Output:

1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
1
Please enter the first value:
5
Please enter the second value:
6
5.000000 + 6.000000 = 11.000000
Would you like to perform another operation
y
1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
2
Please enter the first value:
6
Please enter the second value:
5
6.000000 - 5.000000 = 1.000000
Would you like to perform another operation
y
1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
3
Please enter the first value:
8
Please enter the second value:
9
8.000000 * 9.000000 = 72.000000
Would you like to perform another operation
y
1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
4
Please enter the first value:
6
Please enter the second value:
2
6.000000 / 2.000000 = 3.000000
Would you like to perform another operation
y
1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
5
Please enter the first value:
6
Please enter the second value:
6
6.000000 ^ 6.000000 = 46656.000000
Would you like to perform another operation
y
1.add
2.subtract
3.multiply
4.divide
5.power
6.root
7.modulus
)
Please enter the number of the menu option that corresponds to the operation you'd like to perform
6
Please enter the first value:
36
Please enter the second value:
6
36.000000^1/6.000000 = 1.817121
Would you like to perform another operation

n