Proper A divide B i guess

#include <iostream>
#include <fstream>
#include <bits/stdc++.h>
#include <string>

using namespace std;

string solve(int a, int b)
{
    string headString = "";
    if (a == 0)
    {
        return "0";
    }
    if ((a < 0 && b > 0) || (a > 0 && b < 0))
    {
        headString += "-";
    }
    int temp = abs(a / b);
    headString += to_string(temp);
    int c = abs(a % b);
    if (c == 0)
    {
        return headString;
    }
    headString += ".";
    string backString = "";
    map<int, int> m;
    while (c != 0)
    {
        if (m.find(c) != m.end())
        {
            int index = m[c];
            backString.insert(index, "(");
            backString += ")";
            break;
        }
        m[c] = backString.length();
        c *= 10;
        backString += to_string(c / b);
        c %= b;
    }
    return headString + backString;
}

int main()
{
    int a, b;
    cin >> a >> b;
    cout << solve(a, b);
    return 0;
}