如何給線程函數 beginthread 和 pthread_create 傳遞參數

1. 傳遞單個參數：直接傳遞指向參數的指針。

/*----------------------- beginthread.c ----------------------------*/
#include <process.h>

void doubleNum(void* arg)
{
 int *arg=(int*)arg;
 *arg=(*arg)*2;
}
void main()
{
 int arg = 0;
 _beginthread(doubleNum,0,(void*)&arg);
}
/*----------------------- pthread_create.c ----------------------------*/
#include <pthread.h>

void doubleNum(void* arg)
{
 int *arg=(int*)arg;
 *arg=(*arg)*2;
}
void main()
{
 int arg = 0;
 pthread_t thread;
 pthread_create(&thread,  0, doubleNum, (void*)&arg);
 pthread_join(thread, NULL);
}

2.  傳遞多個參數：定義一個包含所有參數的結構體，傳遞指向結構體的指針。

/*----------------------- StructAndFunc.h ----------------------------*/

#include <stdio.h>
struct threadparam
{
 int *arg1;
 char[5] arg2;
}
void doubleNum(void* arg)
{
 int *arg1=(threadparam*)arg->arg1;
 char *arg2=(threadparam*)arg->arg2;
 printf("integer: %d char array: %s \n", *arg1, arg2);
}

/*----------------------- beginthread.c ----------------------------*/
#include <process.h>
#include <StructAndFunc.h>
void main()
{
 int integer= 5;
 char[5] array={a,b,c,d,e};
 threadparam* param=new threadparam();
 param->arg1=&interger;
 param->arg2=array;
 HANDLE m_hThread = (HANDLE)_beginthread(doubleNum,0,(void*)threadparam);
}
/*----------------------- pthread_create.c ----------------------------*/
#include <pthread.h>
#include <StructAndFunc.h>
void main()
{
 int integer= 5;
 char[5] array={a,b,c,d,e};
 threadparam* param=new threadparam();
 param->arg1=&interger;
 param->arg2=array;
 pthread_t thread;
 pthread_create(&thread,  0, doubleNum, (void*)param);
 pthread_join(thread, NULL);
}
ps，以上代碼未進行測試，可能會存在一些語法小錯誤。