Split Method Calculator Tut

#include <iostream>
#include <string>
#include <vector>

std::vector<std::string> split(std::string uString, char breakOn);

int main() {

    std::string statement = "";
    int num1 = 0;
    int num2 = 0;
    int total = 0;

    std::cout << "Enter a calculation (x to stop): ";
    std::cin >> statement;

    while (statement != "x") {
        if (strstr(statement.c_str(), "+")) {
            num1 = atoi(split(statement, '+')[0].c_str());
            num2 = atoi(split(statement, '+')[1].c_str());

            total = num1 + num2;
            std::cout << num1 << "+" << num2 << "=" << total << std::endl;
        }
        else if (strstr(statement.c_str(), "-")) {
            num1 = atoi(split(statement, '-')[0].c_str());
            num2 = atoi(split(statement, '-')[1].c_str());

            total = num1 - num2;
            std::cout << num1 << "-" << num2 << "=" << total << std::endl;
        }
        else if (strstr(statement.c_str(), "*")) {
            num1 = atoi(split(statement, '*')[0].c_str());
            num2 = atoi(split(statement, '*')[1].c_str());

            total = num1 * num2;
            std::cout << num1 << "*" << num2 << "=" << total << std::endl;
        }
        else if (strstr(statement.c_str(), "/")) {
            num1 = atoi(split(statement, '/')[0].c_str());
            num2 = atoi(split(statement, '/')[1].c_str());

            total = num1 / num2;
            std::cout << num1 << "/" << num2 << "=" << total << std::endl;
        }
        else {
            std::cout << "Invalid\n";
        }
        std::cout << "Enter a calculation (x to stop): ";
        std::cin >> statement;
    }

    system("PAUSE");
}

std::vector<std::string> split(std::string uString, char breakOn) {
    std::vector<std::string> sVec;
    bool hit = false;

    std::string statement1 = "";
    std::string statement2 = "";

    for (unsigned int i = 0; i < uString.size(); i++) {
        if (uString.at(i) != breakOn && hit == false) {
            statement1 += uString.at(i);
        }
        else if (uString.at(i) == breakOn) {
            sVec.push_back(statement1);
            hit = true;
        }
        else if (uString.at(i) != breakOn && hit == true) {
            statement2 += uString.at(i);
        }
    }
    sVec.push_back(statement2);
    return sVec;
}