进程通信之三父进程传参数与子进程返回值

//进程通信之三 父进程传参数与子进程返回值//http://blog.youkuaiyun.com/morewindows/article/details/8683830//By MoreWindows( http://blog.youkuaiyun.com/MoreWindows )#include <windows.h>#include <stdio.h>#include <stdlib.h>#include <time.h>#include <string.h>int main(int argc, char *argv[]){ // 通过GetCommandLine()获取父进程通过CreateProcess传给子进程的参数 // 注意这与argv[]不同如strlen(argv[1])会出错 srand((unsigned int)time(NULL)); return strlen(GetCommandLine()) + rand() % 10;}

然后是父进程的程序代码，代码中的AdjustProcessCurrentDirectory();函数可以参考《Windows VC++ 调整进程当前目录为程序可执行文件所在目录》（http://blog.youkuaiyun.com/morewindows/article/details/8683519）：

//进程通信之三 父进程传参数与子进程返回值//http://blog.youkuaiyun.com/morewindows/article/details/8683830//By MoreWindows( http://blog.youkuaiyun.com/MoreWindows )#include <windows.h>#include <stdio.h>#include <string.h>#include <conio.h>// 启动子进程并传入参数，等待子进程结束后获取其返回值。BOOL GetChildProcessExitCode(const char *pstrChildProcessExeFileName,         char *pstrConmandLine,         DWORD *pdwExitCode, BOOL fHide = TRUE){ //子进程启动信息设置    STARTUPINFO si;      si.cb = sizeof(STARTUPINFO);      GetStartupInfo(&si);        si.wShowWindow = fHide ? SW_HIDE : SW_SHOW;    si.dwFlags     = STARTF_USESHOWWINDOW;   // 运行子进程并等待其结束 PROCESS_INFORMATION pi;    CreateProcess(pstrChildProcessExeFileName, pstrConmandLine, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi);   WaitForSingleObject(pi.hProcess, INFINITE);    // 获取子进程返回值 BOOL flag = GetExitCodeProcess(pi.hProcess, pdwExitCode); CloseHandle(pi.hProcess); CloseHandle(pi.hThread); return flag;}int main(){ printf("    进程通信之三 父进程传参数与子进程返回值\n");         printf(" - http://blog.youkuaiyun.com/morewindows/article/details/8683830 -\n"); printf(" -- By MoreWindows( http://blog.youkuaiyun.com/MoreWindows ) --\n\n");   AdjustProcessCurrentDirectory();  const char *pstrChildProcessExeFileName = "ChildProcess.exe"; const int RUN_CHILDPROCESS_NUMBER = 5; char szCommandLine[30] = "MoreWindows"; int nCommandLineLen = strlen(szCommandLine); for (int i = 0; i < RUN_CHILDPROCESS_NUMBER; i++)    {  // 运行子进程并获取返回值  DWORD dwExitCode;  if (GetChildProcessExitCode(pstrChildProcessExeFileName, szCommandLine, &dwExitCode, TRUE))   printf("子进程返回值为 %d\n", dwExitCode - nCommandLineLen);  else   printf("GetExitCodeProcess()失败  %d\n", GetLastError());  Sleep(1000); } getch(); return 0;}