Question

Intro to java Problem, Please provide code and Pseudocode. Not able to compile correct numbers.

Problem 7: Simple Calculator (10 points) (General) Calculators represent the most basic, general-purpose of computing machines. Your task is to reduce your highly capable computer down into a simple calculator. You will have to parse a given mathematical expression, and display its result.

Your calculator must support addition (+), subtraction (-), multiplication (*), division (/), modulus(%), and exponentiation (**).

Facts

● Mathematical expressions in the form of: num1 operator num2

● Exponentiation should be in the form base ** exponent

○ Example: 3 ** 2 = 9 Input First line is the number of test cases. Each line thereafter is an integer-based mathematical expression in the form defined in the above facts.

Output

For each test case, display the result of the mathematical expression terminated with a new line

character

Sample Input

4

3 + 7

5 - 1

4 ** 2

19 / 5

Sample Output

10

4

16

3

Answer 1

• SUDO CODE OF THE PROBLEM : -

START

1. TAKE INPUT IN VARIABLE 'N'
2. FOR [1 TO N] DO 3 TO 11
3. TAKE INPUT IN STRING 'S'
4. SPLIT 'S' INTO 3 PARTS i.e 'OP1'=1st PART , 'OP2'=3rd PART , 'OP'=2nd PART
5. SWITCH (OP)
6. IF OP="+" : DO ADDITION AND PRINT ANSWER
7. IF OP= "-" : DO SUBTRACTION AND PRINT ANSWER
8. IF OP= "*" : DO MULTIPLICATION AND PRINT ANSWER
9. IF OP= "/" : DO DIVISION AND PRINT ANSWER
10. IF OP= "**" : DO EXPONENT AND PRINT ANSWER
11. IF OP= "%" : DO MODULUS AND PRINT ANSWER

STOP

• PROGRAM OF THE PROBLEM IN JAVA : -

import java.util.Scanner;

public class calc {
static Scanner sc=new Scanner(System.in);

static void perform(String s[]) {
       int op1=Integer.parseInt(s[0]);
       int op2=Integer.parseInt(s[2]);
       String op=s[1];
       switch(op) {
       case "+" :
           System.out.println(op1+op2);
           break;
       case "-" :
           System.out.println(op1-op2);
           break;
       case "*" :
           System.out.println(op1*op2);
           break;
       case "/" :
           if(op2==0)
               System.out.println("Infinite");
           else
               System.out.println(op1/op2);
           break;
       case "%" :
           System.out.println("op1%op2");
           break;
       case "**" :
           System.out.println((int)Math.pow(op1, op2));
           break;
       }
}

public static void main(String[] args) {
   System.out.println("enter no of test cases : ");
   int n;
   n=sc.nextInt();
   sc.nextLine();
   for(int i=1;i<=n;i++) {
       System.out.println("ENTER INPUT NO "+i);
       String s[];
       s=sc.nextLine().split(" ");
       perform(s);
   }
}
}