Operation Between Numbers

#include <iostream>
#include <cmath>
#include <algorithm>
#include <map>
#include <iomanip>

using namespace std;

int main() {
    void operationsBetweenNumbers(); operationsBetweenNumbers();
    return 0;
}

void operationsBetweenNumbers(){
    int a; int b; cin >> a >> b;
    string _operator; cin >> _operator;
    bool isZero = b == 0;
    string noZeroDiv = "Cannot divide " + to_string(a) + " by zero";
    string evenOdd[] = {"even","odd"};
    ostringstream div; div << fixed << setprecision(2) << a / (double)b;
    string division = isZero ? noZeroDiv : div.str();
    //Instances of del and deletion variable were renamed to div, division respectively. Due to closer sounding of del to abbreviation of "delenie" in Bulgarian, such a mistake had occured.
    map<string, string>operators = {{"+", to_string(a + b)}, {"-", to_string(a - b)}, {"*", to_string(a * b)}, {"/", division}, {"%", isZero ? noZeroDiv : to_string(a % b)} };
    if (operators[_operator] == noZeroDiv) {cout << noZeroDiv; return;}
    cout << a <<" "<< _operator <<" "<< b << " = " << operators[_operator];
    if (_operator == "+" || _operator == "-" || _operator == "*") cout << " - " << evenOdd[abs(stoi(operators[_operator])) % 2];
}