【发布时间】：2014-07-19 16:10:33
【问题描述】：
我刚刚学习了 C++，我正在尝试使用 windows.h 头文件制作程序。我正在使用 Dev-C++ 编译器，我遇到了三个我找不到解决方案的错误。
这些是错误：
无法打开输出文件 filename.exe：权限被拒绝
[错误] ld 返回 1 个退出状态 目标“filename.exe”的配方失败
这是我的代码：
#include <windows.h&$62
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
HWND textfield;
/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
switch(Message) {
case WM_CREATE:
CreateWindow("STATIC",
"DocJoin Document Combiner",
WS_VISIBLE | WS_CHILD | WS_BORDER,
20,20,300,25,
hwnd,NULL,NULL,NULL);
break;
/* Upon destruction, tell the main thread to stop */
case WM_DESTROY: {
PostQuitMessage(0);
break;
}
/* All other messages (a lot of them) are processed using default procedures */
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
MSG Msg; /* A temporary location for all messages */
/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "WindowClass";
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */
if(!RegisterClassEx(&wc)) {
MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,"WindowClass","DocJoin",WS_VISIBLE|WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, /* x */
CW_USEDEFAULT, /* y */
683, /* width */
730, /* height */
NULL,NULL,hInstance,NULL);
if(hwnd == NULL) {
MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
/*
This is the heart of our program where all input is processed and
sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
this loop will not produce unreasonably high CPU usage
*/
while(GetMessage(&Msg, NULL, 0, 0) > 0) { /* If no error is received... */
TranslateMessage(&Msg); /* Translate key codes to chars if present */
DispatchMessage(&Msg); /* Send it to WndProc */
}
return Msg.wParam;
}
这是 Makefile.win：
# Project: ProjectName
# Makefile created by Dev-C++ 5.6.3
CPP = g++.exe
CC = gcc.exe
WINDRES = windres.exe
OBJ = main.o
LINKOBJ = main.o
LIBS = -L"[...]" -L"[...]" -static-libgcc -mwindows -g3
INCS = -I"[...]" -I"[...]" -I"[...]"
CXXINCS = -I"[..]" -I"[...]" -I"[...]" -I"[...]"
BIN = filename.exe
CXXFLAGS = $(CXXINCS) -g3
CFLAGS = $(INCS) -g3
RM = rm.exe -f
.PHONY: all all-before all-after clean clean-custom
all: all-before $(BIN) all-after
clean: clean-custom
${RM} $(OBJ) $(BIN)
$(BIN): $(OBJ)
$(CPP) $(LINKOBJ) -o $(BIN) $(LIBS)
main.o: main.cpp
$(CPP) -c main.cpp -o main.o $(CXXFLAGS)
我花了 3 个小时进行研究和故障排除，但我被难住了。 这是我第一次使用 C++ 编译器，这意味着它是我的第一个程序。
【问题讨论】：
-
Permission denied -
我查看了很多线程说检查它是否正在运行。任务管理器我看了好几遍都没有。
-
仅有的两个有意义的选择是 1) 文件被锁定（它可能正在运行或另一个进程可能将其打开以进行独占访问）或； 2) 文件不能被写入，因为目录/设备权限不允许它（确保代码是从正确的 relative 目录编译的）--进程资源管理器搜索打开的文件句柄（有时一个意外的过程可能是罪魁祸首）。
-
我安装了 Process Explorer，它没有找到与
filename.exe相关的进程或句柄。什么是相对目录？