CreateIsEven/createIsEven/createIsEven.cpp

#include <iostream>
#include <chrono>
#include <windows.h>
#include <shellapi.h>
#include <fstream>
#include <string>
#include <sstream>
#include <thread>
#include <mutex>

using namespace std;
void writeToFile(const string& filePath, const string& content, ios_base::openmode mode = ios::out);
void writeToFileFilePointer(const char* filePath, const char* content, const char* mode);
void withStdString(int argc, char* argv[]);
void withStdStringThreaded(int argc, char* argv[]);

mutex m;

int main(int argc, char* argv[]) {
    withStdStringThreaded(argc, argv);
    return 0;
}

void withStdStringThreaded(int argc, char* argv[]) {
    chrono::steady_clock::time_point begin = chrono::steady_clock::now();

    for (int i = 0; i < argc; ++i) {
        cout << i << "\t" << argv[i] << endl;
    }

    thread* t = nullptr;
    const long long maxNumber = atoll(1[argv]);
    const string filePath = 2[argv];

    string firstPrint = "def isEvenNumber(number):\n\tif number == 0: return True\n";
    writeToFile(filePath, firstPrint, ios::trunc); // Schreiben in die Datei, "w" entspricht truncating

    string statementsString;
    int statements = 0;
    long long sumOfStatements = 0;

    for (long long x = 1; x <= maxNumber; ++x) {
        statementsString += "\tif number == " + to_string(x) + ": return " + ((x & 1) == 0 ? "True" : "False") + "\n";
        ++statements;
        ++sumOfStatements;

        if (statements == 1000000) {
            if (t) {
                t->join();
                t = nullptr;
            }
            t = new thread(writeToFile, filePath, statementsString, ios::app);
            statementsString = "";
            statements = 0;
            printf("\r%12lld von %lld (%6.2f%%)", sumOfStatements, maxNumber, ((double)sumOfStatements / maxNumber) * 100);
        }
    }

    if (!statementsString.empty()) {
        if (t) {
            t->join();
            t = nullptr;
        }
        t = new thread(writeToFile, filePath, statementsString, ios::app);
    }
    if (t) {
        t->join();
        t = nullptr;
        printf("\r%12lld von %lld (%6.2f%%)", sumOfStatements, maxNumber, ((double)sumOfStatements / maxNumber) * 100);
    }

    chrono::steady_clock::time_point end = chrono::steady_clock::now();

    cout << "\nTime difference = " << chrono::duration_cast<chrono::seconds>(end - begin).count() << "[s]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::milliseconds>(end - begin).count() << "[ms]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::microseconds>(end - begin).count() << "[micro seconds]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::nanoseconds> (end - begin).count() << "[ns]" << endl;
}

void withStdString(int argc, char* argv[]) {
    chrono::steady_clock::time_point begin = chrono::steady_clock::now();

    for (int i = 0; i < argc; ++i) {
        cout << i << "\t" << argv[i] << endl;
    }

    const long long maxNumber = atoll(1[argv]);
    const string filePath = 2[argv];

    string firstPrint = "def isEvenNumber(number):\n\tif number == 0: return True\n";
    writeToFile(filePath, firstPrint, ios::trunc); // Schreiben in die Datei, "w" entspricht truncating

    string statementsString;
    int statements = 0;
    long long sumOfStatements = 0;

    for (long long x = 1; x <= maxNumber; ++x) {
        statementsString += "\tif number == " + to_string(x) + ": return " + ((x & 1) == 0 ? "True" : "False") + "\n";
        ++statements;
        ++sumOfStatements;

        if (statements == 10000000) {
            writeToFile(filePath, statementsString, ios::app);
            statementsString = "";
            statements = 0;
            printf("\r%12lld von %lld (%6.2f%%)", sumOfStatements, maxNumber, ((double)sumOfStatements / maxNumber) * 100);
        }
    }

    if (!statementsString.empty()) {
        writeToFile(filePath, statementsString, ios::app);
        printf("\r%12lld von %lld (%6.2f%%)", sumOfStatements, maxNumber, ((double)sumOfStatements / maxNumber) * 100);
    }

    chrono::steady_clock::time_point end = chrono::steady_clock::now();

    cout << "Time difference = " << chrono::duration_cast<chrono::seconds>(end - begin).count() << "[s]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::milliseconds>(end - begin).count() << "[ms]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::microseconds>(end - begin).count() << "[micro seconds]" << endl;
    cout << "Time difference = " << chrono::duration_cast<chrono::nanoseconds> (end - begin).count() << "[ns]" << endl;
}


void writeToFileFilePointer(const char* filePath, const char* content, const char* mode) {
    FILE* fptr;

    fptr = fopen(filePath, mode);
    if (fptr != nullptr) {
        fprintf(fptr, content);
        fclose(fptr);
    }
}

void writeToFile(const string& filePath, const string& content, ios_base::openmode mode) {
    m.lock();
    ofstream outFile(filePath, mode);
    if (outFile.is_open()) {
        outFile << content;
        outFile.close();
    }
    m.unlock();
}