線程按指定順序輸出字符到數組的實例代碼

2020-01-26 15:37:11

字體：大中小

來源：轉載

供稿：網友

題目：

有三個線程，線程1的功能就是向字符數組輸出A，線程2的功能就是向字符數組輸出B，線程2的功能就是向字符數組輸出C，要求按順序向數組賦值ABCABCABC，ABC的個數由線程函數1的參數指定。

接口說明：

void Init(); //初始化函數

void Release(); //資源釋放函數

unsignedint__stdcall ThreadFun1(PVOID pM) ; //線程函數1，傳入一個int類型的指針，用于初始化輸出A次數，資源需要線程釋放

unsignedint__stdcall ThreadFun2(PVOID pM) ;//線程函數2，無參數傳入

unsignedint__stdcall ThreadFun3(PVOID pM) ;//線程函數3，無參數傳入

char g_write[1024]; //線程1,線程2,線程3按到順序向該數組賦值。不用考慮數組是否越界，測試用例保證

源代碼：

復制代碼代碼如下:

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <process.h>
#include <windows.h>

#define MAXHANDLE 3

char g_write[1028]; //線程1,線程2,線程3按到順序向該數組賦值
HANDLE g_hThreadEvent[3];
HANDLE handle[MAXHANDLE];
int g_Number;

//線程1函數
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: %s/n", g_write);
        WaitForSingleObject(g_hThreadEvent[0], INFINITE);
        strcat(g_write, "A");
        SetEvent(g_hThreadEvent[1]);
    }
    _endthreadex(0);
    return 0;
}

//線程2函數
unsigned int __stdcall ThreadFun2(PVOID pM)
{
    int iLoop = 0;
    for (iLoop; iLoop < g_Number; iLoop++)
    {
        //printf("this is thread 2: %s/n", g_write);
        WaitForSingleObject(g_hThreadEvent[1], INFINITE);
        strcat(g_write, "B");
        SetEvent(g_hThreadEvent[2]);
    }
    _endthreadex(0);
    return 0;
}

//線程3函數
unsigned int __stdcall ThreadFun3(PVOID pM)
{
    int iLoop = 0;
    for (iLoop; iLoop < g_Number; iLoop++)
    {
        //printf("this is thread 2: %s/n", 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; //需要重復打印的次數
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 = %s/n", g_write);
    system("pause");
    return 0;
}