gmpxx.h：没有这样的文件或目录
我刚刚安装了一个全新的 mingw 副本（32 位），从 Sourceforge 的官方项目页面下载它。我安装了包中的所有内容，所有编译器等等。然后我从 这里 下载 MinGW 的 gmp 。我将 gmp-5.0.1-1-mingw32-src.tar.lzma 提取到我的 mingw 文件夹中，然后从那里运行 ./pkgbuild 。它继续运行了几分钟，然后打印出类似 COMPLETED EVERYTHING OK, EVERYTHING PASS 的内容。
然后我写下了这个简单的示例，以检查它是否能够工作：
#include <gmpxx.h>
int main (void)
{
mpz_class a, b, c;
a = 1234;
b = "-5678";
c = a+b;
cout << "sum is " << c << "\n";
cout << "absolute value is " << abs(c) << "\n";
return 0;
}
然后使用 g++ mycxxprog.cc -lgmpxx -lgmp 编译它。 我得到的唯一答案是：
Fatal error: gmpxx.h: No such file or directory.
有人有任何提示吗？我真的不知道我该怎么办...
I just installed a brand new copy of mingw (32 bit) downloading it from the official project page from Sourceforge. I installed everything in the package, all compilers and so on. Then I downloaded from here gmp for MinGW. I extracted gmp-5.0.1-1-mingw32-src.tar.lzma somewhere into my mingw folder, then ran ./pkgbuild from there. It went on running for some minutes, then printed out something like COMPLETED EVERYTHING OK, EVERYTHING PASS.
Then I wrote down this simple example, to check if it was going to work:
#include <gmpxx.h>
int main (void)
{
mpz_class a, b, c;
a = 1234;
b = "-5678";
c = a+b;
cout << "sum is " << c << "\n";
cout << "absolute value is " << abs(c) << "\n";
return 0;
}
And then compiled it using g++ mycxxprog.cc -lgmpxx -lgmp.
The only answer I get is:
Fatal error: gmpxx.h: No such file or directory.
Does anybody have any hint? I don't really know what should I do...
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gmpxx.h头文件包含在libgmp-dev包中您可以使用以下命令将其安装在基于 Ubuntu 的计算机上：
gmpxx.hheader file is included in thelibgmp-devpackageYou can install it on Ubuntu based machines with this command:
如果您从源代码构建 gmp，则需要将 --enable-cxx 标志添加到配置命令中。
If you are building gmp from source, you need to add the --enable-cxx flag to the configure command.
您也可以将其复制到路径“/usr/include/”，系统会找到它。
You can also copy that to the path"/usr/include/", the system will find it.
您需要确保它位于搜索标头的目录中。找到
gmpxx.h标头所在的位置，并在g++行添加-I /path/to/header/。You need to make sure the is among the directories searched for headers. Find the place where the
gmpxx.hheader resides and add-I /path/to/header/on yourg++line.