#include <pthread.h>
#include <stdio.h>
/* Parameters to print_function.  */
struct char_print_parms
{
    /* The character to print.  */
    char character;
    /* The number of times to print it.  */
    int count;
};
    /* Prints a number of characters to stderr, as given by PARAMETERS,
    which is a pointer to a struct char_print_parms.  */
void* char_print (void* parameters)
{
    /* Cast the cookie pointer to the right type.  */
    struct char_print_parms* p = (struct char_print_parms*) parameters;
    int i;
    for (i = 0; i < p->count; ++i)
    fputc (p->character, stderr);
    return NULL;
}
    /* The main program.  */
int main ()
{
    pthread_t thread1_id;
    pthread_t thread2_id;
    struct char_print_parms thread1_args;
    struct char_print_parms thread2_args;
    /* Create a new thread to print 30,000 ’x’s.  */
    thread1_args.character = ’x’;
    thread1_args.count = 30000;
    pthread_create (&thread1_id, NULL, &char_print, &thread1_args);
    /* Create a new thread to print 20,000 o’s.  */
    thread2_args.character = ’o’;
    thread2_args.count = 20000;
    pthread_create (&thread2_id, NULL, &char_print, &thread2_args);
    return 0;
}

#ifdef _WIN32
#include <windows.h>
#include <process.h>
typedef void(*FUNC)(void*);
#else
#include <pthread.h>
#endif
#include <stdio.h>

/* Parameters to print_function.  */
struct char_print_parms
{
    /* The character to print.  */
    char character;
    /* The number of times to print it.  */
    int count;
};
/* Prints a number of characters to stderr, as given by PARAMETERS,
which is a pointer to a struct char_print_parms.  */
void* char_print (void* parameters)
{
    /* Cast the cookie pointer to the right type.  */
    struct char_print_parms* p = (struct char_print_parms*) parameters;
    int i;
    for (i = 0; i < p->count; ++i)
        fputc (p->character, stderr);
    return 0;
}
/* The main program.  */
int main ()
{
#ifndef _WIN32
    pthread_t thread1_id;
    pthread_t thread2_id;
#endif
    struct char_print_parms thread1_args;
    struct char_print_parms thread2_args;
    /* Create a new thread to print 30,000 ’x’s.  */
    thread1_args.character = 'x';
    thread1_args.count = 30000;
#ifdef _WIN32
    _beginthread((FUNC)char_print, 0, &thread1_args);
#else
    pthread_create (&thread1_id, NULL, &char_print, &thread1_args);
#endif
    /* Create a new thread to print 20,000 o’s.  */
    thread2_args.character = 'o';
    thread2_args.count = 20000;
#ifdef _WIN32
    _beginthread((FUNC)char_print, 0, &thread2_args);   
    Sleep(100);
#else
    pthread_create (&thread2_id, NULL, &char_print, &thread2_args);
    usleep(100);
#endif
    return 0;
} 

代码写干净点,不是所有人都跑的posix规范

楼主把这贴删了吧，一开始不知道怎么发，