Using C++. Need to get the output to look exactly like the one below. CALCULATE.

Question

Using C++. Need to get the output to look exactly like the one below.
CALCULATE.CPP You will write a program that mimicks a simple calculator that can do adding, multiplication, or modulo of 2 integers. The program takes 3 arguments at the command line: an integer, a character, and another integer. The character can be one of only 3 types:"+"X, or %. The program then returns either the sum, the product, or the modulo of the 2 integers. The program should be able to verify that 1) the user has exactly 3 arguments. 2) the operator used is one of the 3 allowed operators and nothing else. 3) when using modulo, the second integer is not zero (otherwise, you would divide by zero)

Explanation / Answer

#include <iostream>
#include <string>
using namespace std;

int main() {
    string input[4];
    int z;
    cout<<"$ ./calculate ";
    cin>>input[0]>>input[1]>>input[2]>>input[3]; //Taking the inputs.
    cout<<endl;
    int x=stoi(input[0]);       //Converting string to integer.
    int y=stoi(input[2]);       //Converting string to integer.
    int size= sizeof(input)/sizeof(input[0]); //Calculating the size of string array.
    if(!input[3].empty())
    {
        cerr<<"Number of arguments is incorrect.";    // printing error
        exit(1);
    }
    if(input[1]=="+"||input[1]=="x"||input[1]=="%")
    {    if(input[1]=="+")                    //sum
         {
         z=x+y;
         cout<<"$ "<<z;
         }
     else if(input[1]=="x")                  //product
     {
         z=x*y;
         cout<<"$ "<<z;
       
     }
     else if(input[1]=="%"&&input[2]!="0")
     {
        z=x%y;                              //modulo
        cout<<"$ "<<z;
     }
         else
         cerr<<"Cannot divide by zero.";     //printing error
    }
     else
        cerr<<"Bad operation choice.";      //printing error


    return 0;
}

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