#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Windows.h>

void draw(const char *txt);

int main(int argc, char* argv[]) {
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    memset(&si, 0, sizeof(si));
    si.cb = sizeof(si);
    memset(&pi, 0, sizeof(pi));

    int curtime = (int) GetTickCount();
    printf("Starting a process, curtime=%d\n", curtime);
    if (argc <= 1) {
        printf("Parent\n");
        if (!CreateProcess(
            "winproc.exe",   // Module name
            "winproc Tails", // Command line
            NULL,           // Process handle not inheritable
            NULL,           // Thread handle not inheritable
            FALSE,          // Do not inherit handles
            0, // CREATE_NEW_CONSOLE, // Creation flags
            NULL,           // Use parent's environment block
            NULL,           // Use parent's starting directory
            &si,            // Pointer to STARTUPINFO structure
            &pi             // Pointer to PROCESS_INFORMATION structure
        ))
        {
            printf( "CreateProcess failed (%d)\n", GetLastError() );
            exit(-1);
        }

        srand(curtime);
        draw("Heads");
        // Wait until child process exits.
        WaitForSingleObject(pi.hProcess, INFINITE);

        // Close process and thread handles.
        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);

    } else {
        printf("Child\n");
        srand(curtime + 1234567);
        draw(argv[1]);
    }
    return 0;
}

void draw(const char *txt) {
    for (int i = 0; i < 10; ++i) {
        printf("%s\n", txt);
        int r = rand() % 2000 + 1;
        Sleep(r);
    }
}