fread fwrite fprintf fscanf, C-style strtok and C++ getline for tokenize

binary.cc

#include <iostream>
#include <cstdio>

using namespace std;

int main()
{

    /* Binary IO*/
    /*
    FILE *fd = fopen("./test-binary", "w");
    if (fd)
    {
        int arr[] = { 1, 2, 3};
        fwrite(arr, sizeof(int), 3, fd);
        fclose(fd);
    }

    FILE *fd_read = fopen("./test-binary", "r");
    if (fd_read)
    {
        const int size = 3;
        int arr[size];

        fread(arr, sizeof(int), 3, fd_read);

        for (int i = 0; i < size; i++)
        {
            cout << arr[i] << endl;
        }

        fclose(fd_read);
    }
     */

    /* Text IO */
    FILE *fd = fopen("./test-format", "w");
    if (fd)
    {
        fprintf(fd, "Formatted %d %d %d\n", 1, 2, 3);
        fclose(fd);
    }

    FILE *fd_read = fopen("./test-format", "r");
    if (fd_read)
    {
        int arr[3];
        fscanf(fd, "Formatted %d %d %d\n", 
                &arr[0],
                &arr[1],
                &arr[2]);
        for (int i = 0; i < 3; i++)
        {
            cout << arr[i] << endl;
        }
        fclose(fd_read);
    }

    return 0;
}

tokenizer.cc

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

using namespace std;

int main()
{
    string input = "kljfda,flaksdjf,fkladf,ljioqwe,dasf";

    stringstream ss;
    ss << input;

    vector<string> tokens;

    string output;
    while (std::getline(ss, output, ','))
    {
        tokens.push_back(output);
    }

    for (string& s : tokens)
    {
        cout << s << endl;
    }

    return 0;
}

tokenizer2.cc

#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <cstring>

using namespace std;

int main()
{
    char buffer[] = "kljfda,flaksdjf|fkladf,ljioqwe,dasf";
    vector<string> tokens;

    char *token = strtok(buffer, ",|");
    while (token)
    {
        tokens.push_back(string(token));
        token = strtok(NULL,",|");
    }

    for (string& s : tokens)
    {
        cout << s << endl;
    }

    return 0;
}