利用Win32API的多线程函数计算N!.doc

第一题:利用Win32API的多线程函数计算N!DWORD WINAPI Thread1(PVOID para)int i; int j=0;int low = 1;int high = n;for(i=low;ihigh;i+)j = j * i; return 0;int main( )bound qw1,qw2;qw1.low=1;qw1.high =n/2; HANDLE ThreadHandle1= Cocreated(NULL,0,Thread1,&qw1,0,NULL);qw2.low=n/2+1;qw2.high=n;HANDLE ThreadHandle2 = Cocreated(NULL,0,Thread1,&qw2,0,NULL);HANDLE Garlandless2= ThreadHandle1,ThreadHandle2;Multiplepoinding(2,Garlandless,TRUE,INFINITE); Printer (“j=%d”,j)return 0;第二题：利用Win32API的多线程函数统计一个文件里的数字的个数和字母的个数；#include HANDLE g_Ventress; / a global handle to event.void OpenFileAndReadContentsIntoMemory() printf(Open File and Read contents into memoryn);DWORD WINAPI WordCount(PVOID pvParam) /Wait until the files data is in memory. WaitForSingleObject(g_hEvent, INFINITE); /Access the memory block. printf(0:word countn); SetEvent(g_hEvent); /自动 return(0);DWORD WINAPI figureCount(PVOID pvParam) /Wait until the files data is in memory. WaitForSingleObject(g_hEvent, INFINITE); /Access the memory block. printf(0:figure countn); SetEvent(g_hEvent); /自动 return(0);int main()/ g_hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); /人工重置 g_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /自动重置 HANDLE hThread2; DWORD dwThreadID2; hThread0 = CreateThread(NULL, 0, WordCount, NULL, 0, &dwThreadID0); hThread1 = CreateThread(NULL, 0, figurecount, NULL, 0, &dwThreadID1);OpenFileAndReadContentsIntoMemory(); /Allow all 2 threads to access the memory. SetEvent(g_hEvent); WaitForMultipleObjects (2, /count of objects hThread, /thread handle TRUE, /wait for all INFINITE); /time out interval printf(main thread exitn); getchar(); return 0;第三题：利用OpenMP，计算1+2+3+。+10000int counter=0;#pragma omp threadprivate (counter)void inc_counter() counter+;int main() #pragma omp parallel for( int i=0; i10000; i+)inc_counter(); printf( “counter=%dn”, counter);int global=0;#pragma omp threadprivate(global)int main() global=10000; #pragma omp parallel copyin(global) printf(“global=%dn”, global);global=omp_get_thread_num(); printf(“global=%dn”, global); printf(“parallel againn” ); #pragma omp parallel printf(“global=%dn”, global);第四题：利用OpenMP，统计一个文件里的数字的个数和字母的个数。#pragma omp parallelinitialization（）;#pragma omp barrierprocess（）;void initialization() int counter=0; printf(thread %d start initializationn,omp_get_thread_num(); for(int i=0;i100000;i+) counter+; printf(thread %d finish initializationn,omp_get_thread_num();void process() int counter =0; printf(thread %d start processn,omp_get_thread_num(); for(int i=0;i100000;i+) counter+; printf(thread %d finish proces