这是我的第一篇文章，所以我会尽量简短一些
我现在正在读Stroustrup的PPP书的第12章，我安装了FLTK，就像他们在这个youtube视频https://www.youtube.com/watch?v=0eSOPWQ1n6U上做的那样
已经从Stroustrup的网站下载了头文件，我正试图用GUI做第一个例子练习，在那里你做了一个红色三角形
代码:#include "Simple_window.h" // get access to our window library
#include "Graph.h" // get access to our graphics library facilities
int main()
{
using namespace Graph_lib; // our graphics facilities are in Graph_lib
Point tl(100,100); // to become top left corner of window
Simple_window win(tl,600,400,"Canvas"); // make a simple window
Polygon poly; // make a shape (a polygon)
poly.add(Point(300,200)); // add a point
poly.add(Point(350,100)); // add another point
poly.add(Point(400,200)); // add a third point
poly.set_color(Color::red); // adjust properties of poly
win.attach (poly); // connect poly to the window
win.wait_for_button(); // give control to the display engine
}
我已经尝试了几天不同的事情，但我一直被撞到墙上，这是我从代码中得到的错误，现在安装了我所知道的
1>------ Build started: Project: hello world5, Configuration: Debug Win32 ------
1> main.cpp
1>c:userskenzoonedrivedocumentosvisual studio 2015gui.h(107): warning C4018: '<': signed/unsigned mismatch
1>c:userskenzoonedrivedocumentosvisual studio 2015gui.h(112): warning C4018: '<': signed/unsigned mismatch
1>c:userskenzoonedrivedocumentosvisual studio 2015gui.h(117): warning C4018: '<': signed/unsigned mismatch
1>c:userskenzoonedrivedocumentosvisual studio 2015simple_window.h(13): error C2440: '<function-style-cast>': cannot convert from 'initializer list' to 'Graph_lib::Point'
1> c:userskenzoonedrivedocumentosvisual studio 2015simple_window.h(13): note: No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:userskenzoonedrivedocumentosvisual studio 2015simple_window.h(13): error C2661: 'Graph_lib::Button::Button': no overloaded function takes 4 arguments
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(9): error C2440: 'initializing': cannot convert from 'initializer list' to 'Graph_lib::Point'
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(9): note: No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(12): error C2872: 'Polygon': ambiguous symbol
1> c:program files (x86)windows kits8.1includeumwingdi.h(4997): note: could be 'BOOL Polygon(HDC,const POINT *,int)'
1> c:userskenzoonedrivedocumentosvisual studio 2015graph.h(230): note: or 'Graph_lib::Polygon'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(12): error C2146: syntax error: missing ';' before identifier 'poly'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(12): warning C4551: function call missing argument list
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(12): error C2065: 'poly': undeclared identifier
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(14): error C2065: 'poly': undeclared identifier
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(14): error C2228: left of '.add' must have class/struct/union
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(14): note: type is 'unknown-type'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(14): error C2440: '<function-style-cast>': cannot convert from 'initializer list' to 'Graph_lib::Point'
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(14): note: No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(15): error C2065: 'poly': undeclared identifier
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(15): error C2228: left of '.add' must have class/struct/union
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(15): note: type is 'unknown-type'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(15): error C2440: '<function-style-cast>': cannot convert from 'initializer list' to 'Graph_lib::Point'
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(15): note: No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(16): error C2065: 'poly': undeclared identifier
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(16): error C2228: left of '.add' must have class/struct/union
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(16): note: type is 'unknown-type'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(16): error C2440: '<function-style-cast>': cannot convert from 'initializer list' to 'Graph_lib::Point'
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(16): note: No constructor could take the source type, or constructor overload resolution was ambiguous
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(17): error C2065: 'poly': undeclared identifier
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(17): error C2228: left of '.set_color' must have class/struct/union
1> c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(17): note: type is 'unknown-type'
1>c:userskenzoonedrivedocumentosvisual studio 2015projectshello world5hello world5main.cpp(19): error C2065: 'poly': undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
请问我该怎么办?老实说，在这本书的前半部分如此紧张和严肃之后，我真的很期待在图像方面做些改变。
亲切的问候,
高田贤三
这里可用的simple_windows.h的第13行看起来并不假。因此，错误必须来自其中包含的标头之一。
第一个候选者(假设)
simple_windows.h包含一个报头GUI.h。B.Stroustrup提供了两个文件:Gui.h和GUI.h。在linux系统上，这是两个不同的文件，因为文件名区分大小写。但你显然是在windows (Visual Studio 15)下工作，它管理文件名不敏感。因此，操作系统没有区别(当然，您只有这两个文件中的一个)。
当你正在学习第12章时，我建议你尝试GUI.h。第一行是:
// This is a GUI support code to the chapters 12-16 of the book
第二个候选(更可能)
我进一步研究了各种包括，发现了一个更可能的原因。因此，如果这不能解决问题，那么看看Point.h。其中的struct Point仅用默认构造函数定义。从x和y坐标构造一个点的构造函数被注释掉:
// Point(int xx, int yy) : x(xx), y(yy) { }
这意味着在第13行的语句中，编译器会突出显示为错误:
next_button(Point(x_max()-70,0), 70, 20, "Next", cb_next) { attach(next_button); }
表达式Point(x_max()-70,0)确实不正确，并导致您报告的错误。取消这个构造函数的注释
建议:我还没有读过这本书。但是你可以重新仔细阅读第1章到第11章，看看是否有一步一步的指导/练习可以让你在提供的源代码中取消这一行和其他行的注释。
编辑:advice 2 -是的，遵循advice 1，因为显然它可能是这里和这里以及其他几个地方解释的情况
首先，感谢所有的回复和评论，很高兴听到有人帮助我，非常感谢你
所以我基本上尝试了所有的方法，但我担心没有任何效果，我从切换
开始simple_windows.h
查看@Christophe的版本link
然后我试着用GUI.h，后来用小写的Gui.h代替，留下原来的大写GUI。
当我打开point.h，看到所有的东西都像你说的那样被引用出来时，我以为我终于明白了!buuuut……'(
)我有一种感觉，我得到的错误信息调试现在有点短吗?
我开始觉得也许我把标题错了?我试着把它们放在包含文件夹从microsoft visual studio/VC，也复制它们，并将它们放在头文件与编译器打开，有时也把它们直接放在项目文件夹
在这一点上，我很抱歉打扰你，但我将感谢任何其他可能的解决方案
重载的一些奇怪的东西的截图
我感觉+2过载是问题
1>------ Build started: Project: hello world2, Configuration: Debug Win32 ------
1> main.cpp
1>c:userskenzodesktophello world2hello world2main.cpp(11): error C2872: 'Polygon': ambiguous symbol
1> c:program files (x86)windows kits8.1includeumwingdi.h(4997): note: could be 'BOOL Polygon(HDC,const POINT *,int)'
1> c:program files (x86)microsoft visual studio 14.0vcincludegraph.h(230): note: or 'Graph_lib::Polygon'
1>c:userskenzodesktophello world2hello world2main.cpp(11): error C2146: syntax error: missing ';' before identifier 'poly'
1>c:userskenzodesktophello world2hello world2main.cpp(11): warning C4551: function call missing argument list
1>c:userskenzodesktophello world2hello world2main.cpp(11): error C2065: 'poly': undeclared identifier
1>c:userskenzodesktophello world2hello world2main.cpp(13): error C2065: 'poly': undeclared identifier
1>c:userskenzodesktophello world2hello world2main.cpp(13): error C2228: left of '.add' must have class/struct/union
1> c:userskenzodesktophello world2hello world2main.cpp(13): note: type is 'unknown-type'
1>c:userskenzodesktophello world2hello world2main.cpp(14): error C2065: 'poly': undeclared identifier
1>c:userskenzodesktophello world2hello world2main.cpp(14): error C2228: left of '.add' must have class/struct/union
1> c:userskenzodesktophello world2hello world2main.cpp(14): note: type is 'unknown-type'
1>c:userskenzodesktophello world2hello world2main.cpp(15): error C2065: 'poly': undeclared identifier
1>c:userskenzodesktophello world2hello world2main.cpp(15): error C2228: left of '.add' must have class/struct/union
1> c:userskenzodesktophello world2hello world2main.cpp(15): note: type is 'unknown-type'
1>c:userskenzodesktophello world2hello world2main.cpp(16): error C2065: 'poly': undeclared identifier
1>c:userskenzodesktophello world2hello world2main.cpp(16): error C2228: left of '.set_color' must have class/struct/union
1> c:userskenzodesktophello world2hello world2main.cpp(16): note: type is 'unknown-type'
1>c:userskenzodesktophello world2hello world2main.cpp(18): error C2065: 'poly': undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
我不知道我在某个地方有这个头，一定是从fltk.org zip安装的?
这是从Stroustrup下载的头文件
我去把wingdi.h发送到回收站，然后在调试时我得到了一个致命的错误
所以多边形在图头可能定义得很糟糕?我可以看到多边形内部函数的一些定义但没有多边形本身的定义，也许我只是一个新手
我还继续并将polygon更改为Graph_library:: polygon，但没有工作
解决方案:
您需要取消注释(从这些行中删除//)来自您必须从http://www.stroustrup.com/Programming/PPP2code/
下载的"Point.h"文件中的以下行Point(int xx, int yy) : x(xx), y(yy) { }
Point() :x(0), y(0) { }
Point& operator+=(Point d) { x+=d.x; y+=d.y; return *this; }