C++ 如何在C++；这包含GMP变量吗？

我正在尝试使用：

int array_size = 5;
mpz_t numerator_arr;
for (i = 0; i < array_size; i++) {
    mpz_init2(numerator_arr[i], 100);
}
numerator_arr = { 1, -1, 1, 5, -691 };

编辑**：在进一步挖掘之后，我发现我需要用

mpz_t *numerator_arr = new mpz_t[array_size];

但编译器仍在返回错误：

test.cpp:17:38: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [enabled by default]
  numerator_arr = { 1, -1, 1, 5, -691 };
                                      ^
test.cpp:17:16: error: cannot convert ‘<brace-enclosed initializer list>’ to ‘__mpz_struct (*)[1]’ in assignment
  numerator_arr = { 1, -1, 1, 5, -691 };
                ^

test.cpp:12:60: error: in C++98 ‘numerator_arr’ must be initialized by constructor, not by ‘{...}’
  vector<mpz_class> numerator_arr{ 1, -1, 1, -1, 5, -691, 7 };
                                                            ^
test.cpp:12:60: error: no matching function for call to ‘std::vector<__gmp_expr<__mpz_struct [1], __mpz_struct [1]> >::vector(<brace-enclosed initializer list>)’
test.cpp:12:60: note: candidates are:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/4.8.3/include/c++/vector:64:0,
                 from test.cpp:2:
/usr/lib/gcc/x86_64-pc-cygwin/4.8.3/include/c++/bits/stl_vector.h:398:9: note: template<class _InputIterator> std::vector<_Tp, _Alloc>::vector(_InputIterator, _InputIterator, const allocator_type&)
         vector(_InputIterator __first, _InputIterator __last,
         ^
/usr/lib/gcc/x86_64-pc-cygwin/4.8.3/include/c++/bits/stl_vector.h:398:9: note:   template argument deduction/substitution failed:
test.cpp:12:60: note:   cannot convert ‘1’ (type ‘int’) to type ‘const allocator_type& {aka const std::allocator<__gmp_expr<__mpz_struct [1], __mpz_struct [1]> >&}’
  vector<mpz_class> numerator_arr{ 1, -1, 1, -1, 5, -691, 7 };
                                                            ^

我试着像这样存储数字

-94598037819122125295227433069493721872702841533066936133385696204311395415197247711

编译器将返回以下警告和错误：

test.cpp:29:3: warning: this decimal constant is unsigned only in ISO C90 [enabled by default]
test.cpp:30:4: warning: integer constant is too large for its type [enabled by default]
   -94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
    ^
test.cpp: In function ‘int main()’:
test.cpp:30:88: error: conversion from ‘__int128 unsigned’ to ‘mpz_class {aka __gmp_expr<__mpz_struct [1], __mpz_struct [1]>}’ is ambiguous
   -94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
                                                                                        ^
test.cpp:30:88: note: candidates are:
In file included from test.cpp:2:0:
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(double)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(float)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(long unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(long int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(short unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(short int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(unsigned char)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(signed char)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^

test.cpp:29:3:警告：此十进制常量仅在ISO C90中无符号[默认启用]
test.cpp:30:4:警告：整数常量对于其类型而言太大[默认情况下已启用]
-94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
^
test.cpp:在函数“int main（）”中：
test.cpp:30:88:错误：从“uu int128 unsigned”到“mpz_class{aka uuu gmp_expr}”的转换不明确
-94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
^
考试。cpp:30:88：注：考生为：
在test.cpp中包含的文件中：2:0:
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（双倍）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（浮动）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3:注：_gmp_expr:：_gmp_expr（长无符号整数）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（长整型）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3:注：_gmp_expr:：_gmp_expr（短无符号整数）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（短int）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3:注：_gmp_expr:：_gmp_expr（未签名整数）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（int）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（未签名字符）
__GMPXX_定义_算术_构造函数
^
/usr/include/gmpxx.h:1423:3：注：_gmp_expr:：_gmp_expr（签名字符）
__GMPXX_定义_算术_构造函数
^

---

这是我第一次在GMP中使用阵列。任何帮助都将不胜感激。

好吧，总结以上所有评论，如果您在代码中处理大量数组修改（插入/删除），最好使用

vector

保存mpz_类变量。 使用

mpz_class

而不是

mpz_t

更好的原因是，首先，您不必担心跟踪变量所使用的内存（

mpz_init（）/mpz_clear（）

），其次，由于许多操作符都映射到

mpz_class

），您编写的代码变得更加清晰

关于错误，您的

向量

代码是导致错误的原因，因为您没有正确地实例化变量。也许是你的意思

mpz_class numerator_arr[] = { 1, -1, 1, -1 };
vector<mpz_class> arr (numerator_arr);

您已经在将大量的数字初始化为基本的int类型。在您的例子中，这个数字被分配为一个无符号的16字节int，因为它太大了，而且gmp没有提供任何构造函数使它成为它的

mpz_类

结构。 您最好将输入参数设置为字符串（constchar*），而不是int

mpz_class m("-11111111111111111111111111111111111111111111111")

---

希望这有帮助。

分子_arr={1，-1,1,5，-691}分子arr

时才允许使用code>编辑之前，您是否阅读了rupesh.yadav的评论？不要分配。初始化！为什么不使用std:：vector？@我相信我正在用for循环初始化rupesh.yadav和harper。@Blacktempel我需要mpz，因为这些数字会非常大。我所写的只是我拥有的数字的一个小样本。你最好用C++接口来GMP。如果我正确阅读文档，您可以编写

std:：vector momerator_arr{1，-1,1,5，-691}

。

test.cpp:29:3: warning: this decimal constant is unsigned only in ISO C90 [enabled by default]
test.cpp:30:4: warning: integer constant is too large for its type [enabled by default]
   -94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
    ^
test.cpp: In function ‘int main()’:
test.cpp:30:88: error: conversion from ‘__int128 unsigned’ to ‘mpz_class {aka __gmp_expr<__mpz_struct [1], __mpz_struct [1]>}’ is ambiguous
   -94598037819122125295227433069493721872702841533066936133385696204311395415197247711 };
                                                                                        ^
test.cpp:30:88: note: candidates are:
In file included from test.cpp:2:0:
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(double)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(float)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(long unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(long int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(short unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(short int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(unsigned int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(int)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(unsigned char)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^
/usr/include/gmpxx.h:1423:3: note: __gmp_expr<__mpz_struct [1], __mpz_struct [1]>::__gmp_expr(signed char)
   __GMPXX_DEFINE_ARITHMETIC_CONSTRUCTORS
   ^

mpz_class numerator_arr[] = { 1, -1, 1, -1 };
vector<mpz_class> arr (numerator_arr);

mpz_class m(-11111111111111111111111111111111111111111111111)

mpz_class m("-11111111111111111111111111111111111111111111111")