The thread outputs the characters to the array in the specified order

Topic:

There are three threads. The function of thread 1 is to output A to the character array, the function of thread 2 is to output B to the character array, and the function of thread 2 is to output C to the character array, and the function of thread 2 is to assign ABCABCABC to the array in order. The number of ABC is specified by the parameter of thread function 1.

Interface description:

Void Init ();   // initializes the function

Void Release (); // resource release function

Unsignedint__stdcall ThreadFun1 PVOID (pM)   ; // thread function 1, passing in an int pointer, used to initialize the output A times, resources need to be released by the thread

Unsignedint__stdcall ThreadFun2 PVOID (pM)   ; // thread function 2, no parameters passed in

Unsignedint__stdcall ThreadFun3 PVOID (pM)   ; // thread function 3, no parameter passed in

char   G_write [1024]. // thread 1, thread 2, and thread 3 assign values to the array in descending order. Do not worry about whether the array overbounds, test case guarantee

The source code:

#include <string.h>
#include <stdlib.h>
#include <stdio.h>   
#include <process.h>   
#include <windows.h>   
#define MAXHANDLE  3
char  g_write[1028]; //Thread 1, thread 2, and thread 3 assign values to the array in descending order
HANDLE g_hThreadEvent[3];
HANDLE handle[MAXHANDLE];
int g_Number;
//Thread 1 function & NBSP; & have spent
unsigned int __stdcall ThreadFun1(PVOID pM)  
{  
    int uiNumber = *(int *)pM;
    int iLoop    = 0;
    g_Number = uiNumber;
    for (iLoop; iLoop < uiNumber; iLoop++)
    {
        //printf("this is thread 1: %sn", g_write);
        WaitForSingleObject(g_hThreadEvent[0], INFINITE);
        strcat(g_write, "A");
        SetEvent(g_hThreadEvent[1]);
    }
    _endthreadex(0);
    return 0; 
}  
//Thread 2 function & NBSP; & have spent
unsigned int __stdcall ThreadFun2(PVOID pM)  
{  
    int iLoop = 0;
    for (iLoop; iLoop < g_Number; iLoop++)
    {
        //printf("this is thread 2: %sn", g_write);
        WaitForSingleObject(g_hThreadEvent[1], INFINITE);
        strcat(g_write, "B");
        SetEvent(g_hThreadEvent[2]);
    }
    _endthreadex(0);
    return 0;  
}  
//Thread 3 function & NBSP; & have spent
unsigned int __stdcall ThreadFun3(PVOID pM)  
{  
    int iLoop = 0;
    for (iLoop; iLoop < g_Number; iLoop++)
    {
        //printf("this is thread 2: %sn", g_write);
        WaitForSingleObject(g_hThreadEvent[2], INFINITE);
        strcat(g_write, "C");
        SetEvent(g_hThreadEvent[0]);
    }
    _endthreadex(0);
    return 0;  
}  
void Init(void)
{
    g_hThreadEvent[0] = CreateEvent(NULL, FALSE, TRUE, NULL);
    g_hThreadEvent[1] = CreateEvent(NULL, FALSE, FALSE, NULL);
    g_hThreadEvent[2] = CreateEvent(NULL, FALSE, FALSE, NULL);
    memset(g_write, NULL, sizeof(g_write));
}
void Release(void)
{
    int iLoop = 0; 
    for (int iLoop = 0; iLoop < MAXHANDLE; iLoop++)
    {
        CloseHandle(handle[iLoop]);
    }
}
int main( int Argc, char* Argv[])
{
    int uiNumber = 10;   //The number of times it needs to be reprinted
    int *num     = NULL;
    Init();
    num  = (int*)malloc(sizeof(int));
    *num = uiNumber;
    handle[0] = (HANDLE)_beginthreadex(NULL, 0, ThreadFun1, num, 0, NULL);
    handle[1] = (HANDLE)_beginthreadex(NULL, 0, ThreadFun2, NULL, 0, NULL);
    handle[2] = (HANDLE)_beginthreadex(NULL, 0, ThreadFun3, NULL, 0, NULL);
    WaitForMultipleObjects(MAXHANDLE, handle, TRUE, INFINITE);
    Release();
    printf("g_write = %sn", g_write);
    system("pause");
    return 0;
}