帮助在 C++ 中使用 PCRE

Question

这是我第一次尝试构建 C++ 应用程序，所以我有点迷茫。我看过一些例子，但我仍然不知道哪里出了问题。

#include <iostream>
#include <stdio.h>
#include <windows.h>
#include <pcrecpp.h>
#include <string>
#include <cstring>

using namespace std;

int main()
{
    char title[256];
    char url[256];
    string song, diff;
    HWND hwnd = FindWindow("WindowsForms10.Window.8.app.0.33c0d9d", NULL);
    GetWindowTextA(hwnd, title, 255);
    pcrecpp::RE re("^osu!  - (.*) \\[(.*)\\] \\[[|-]{21}\\]$");
    re.FullMatch(title, &song, &diff);
    sprintf(url, "xfire:game_stats?game=%s&%s=%s&%s=%s", "osu", "Playing", song.c_str(), "Difficulty", diff.c_str());
    ShellExecute(NULL, NULL, url, NULL, NULL, SW_SHOWDEFAULT);
    return 0;
}

当我尝试编译时，我得到以下编译器错误

obj\Debug\main.o||In function 'main':| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZN7pcrecpp2RE6no_argE'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZN7pcrecpp2RE6no_argE'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZN7pcrecpp2RE6no_argE'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZN7pcrecpp2RE6no_argE'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZN7pcrecpp2RE6no_argE'| obj\Debug\main.o:C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|more undefined references to '_imp___ZN7pcrecpp2RE6no_argE' follow| obj\Debug\main.o||In function 'main':| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|18|undefined reference to '_imp___ZNK7pcrecpp2RE9FullMatchERKNS_11StringPieceERKNS_3ArgES6_S6_S6_S6_S6_S6_S6_S6_S6_S6_S6_S6_S6_S6_S6_'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|17|undefined reference to '_imp___ZN7pcrecpp2RED1Ev'| C:\Users\Zeffy\Desktop\osu-gamestats\main.cpp|17|undefined reference to '_imp___ZN7pcrecpp2RED1Ev'| obj\Debug\main.o||In function 'Arg':| C:\MinGW\msys\1.0\local\include\pcrecpparg.h|89|undefined reference to '_imp___ZN7pcrecpp3Arg12parse_stringEPKciPv'| obj\Debug\main.o||In function 'RE':| C:\MinGW\msys\1.0\local\include\pcrecpp.h|493|undefined reference to '_imp___ZN7pcrecpp2RE4InitERKSsPKNS_10RE_OptionsE'| ||=== Build finished: 11 errors, 0 warnings ===|

Answer 1

_imp___ZN7pcrecpp2RE6no_argE 是一个错误的名称。由于它包含pcrecpp 和no_arg 部分，我怀疑问题在于您无法链接到 Pcrecpp。因此，no_arg 符号未定义。