#include<windows.h>
#include<stdio.h>
int ThreadData=1;
int n;
DWORD    f,f1,f2=1;
CRITICAL_SECTION csPrint;  // 声明一个临界区
//HANDLE hmutex; //互斥信号量
void Print(char *str)  
{
    //EnterCriticalSection(&csPrint); // 进入临界区
    for (;*str != '\0';str++)
    {
        Sleep(5000);
        printf("%c",*str);
    }
    printf("\n");
//    LeaveCriticalSection(&csPrint); // 退出临界区
}
DWORD WINAPI ThreadProcess(LPVOID lpParameter)
{
    //WaitForSingleObject(hmutex,INFINITE);
    printf("This is Sub Thread!\n");
    for(int i=1;i<=n;i++)
    {
        f2=f2*i;
        printf("f2[%d]=%d\n",i,f2);
    }
    printf("\n");
    ThreadData=0;
    //ReleaseMutex(hmutex);
    return 0;
}
int main()
{
    HANDLE hThread;
    DWORD ThreadID;
    InitializeCriticalSection(&csPrint); // 初始化临界区
    printf("请输入一个小于20的正整数：");
    scanf("%d",&n);
//    WaitForSingleObject(hmutex,INFINITE);  //等待互斥对象
    for(int i=1,f1=0;i<=n;i++)
    {
        f1=f1+i;
        printf("f1[%d]=%d\n",i,f1);
    }
    printf("\n");
//    ReleaseMutex(hmutex);
    hThread=CreateThread(NULL,0,ThreadProcess,NULL,0,&ThreadID);//创建一个新的线程
    while (ThreadData)
    {
        Print("Main Thread is waiting for Sub Thread!\n");
        //Sleep(600);
    }
    f=f1+f2;
    printf("The sum is %d\n",f);
    Sleep(1000);
    return 0;
}
i是主线程和子线程共同访问的量，为什么主线程和子线程之间没有进行互斥操作  但是它们输出的结果并没有错误呢？求大神们给小弟说一下