Calculator And Split Method (Custom)

//C++ Console Calculator
//By Ben Bollinger

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

//Split Method Declaration:
std::vector<std::string> split(std::string uString, char oper);

int main() {

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

    //Keep Program Running:
    while (statement != "x") {
        //Addition:
        if (strstr(statement.c_str(), "+")) {
            //Convert Split Method String Vec To Ints:
            int num1 = atoi(split(statement, '+')[0].c_str());
            int num2 = atoi(split(statement, '+')[1].c_str());

            //Calculate And Display Answer:
            int total = num1 + num2;
            std::cout << num1 << "+" << num2 << "=" << total << "\n";
        }
        //Subtraction:
        else if (strstr(statement.c_str(), "-")) {
            //Convert Split Method String Vec To Ints:
            int num1 = atoi(split(statement, '-')[0].c_str());
            int num2 = atoi(split(statement, '-')[1].c_str());

            //Calculate And Display Answer:
            int total = num1 - num2;
            std::cout << num1 << "-" << num2 << "=" << total << "\n";
        }
        //Multiplication:
        else if (strstr(statement.c_str(), "*")) {
            //Convert Split Method String Vec To Ints:
            int num1 = atoi(split(statement, '*')[0].c_str());
            int num2 = atoi(split(statement, '*')[1].c_str());

            //Calculate And Display Answer:
            int total = num1 * num2;
            std::cout << num1 << "*" << num2 << "=" << total << "\n";
        }
        //Division:
        else if (strstr(statement.c_str(), "/")) {
            //Convert Split Method String Vec To Ints:
            int num1 = atoi(split(statement, '/')[0].c_str());
            int num2 = atoi(split(statement, '/')[1].c_str());

            //Calculate And Display Answer:
            int total = num1 / num2;
            std::cout << num1 << "/" << num2 << "=" << total << "\n";
        }
        //Exception Handling:
        else {
            std::cout << "Invalid\n";
        }
        //Re-Ask To Continue:
        std::cout << "Enter statement (x to stop): ";
        std::cin >> statement;
    }
    //Pause Console:
    system("PAUSE");
}

//Split Method Definition:
std::vector<std::string> split(std::string uString, char oper) {
    //Variables:
    std::vector<std::string> sVec;
    bool hit = false;

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

    //Loop Through All String Chars:
    for (int i = 0; i < uString.size(); i++) {
        if (uString.at(i) != oper && hit == false) {
            statement1 += uString.at(i);
        }
        //After Operator Add 1st Num:
        else if (uString.at(i) == oper) {
            sVec.push_back(statement1);
            hit = true;
        }
        //After Operator And First Num Create 2nd Num:
        else if (uString.at(i) != oper && hit == true) {
            statement2 += uString.at(i);
        }
    }
    //Add 2nd Num:
    sVec.push_back(statement2);
    return sVec;
}