私は線形代数を学んでいます。新しい発見された知識の一部を小さなC++プログラムに変換すると思いました。数字については、私が使用しようとしているCLN, a Class Library for Numbersを見つけました。次のプログラムはどのようにコンパイルできますか?
LinearEquation.h:
#include <iostream>
#include <cln/real.h>
#include <cln/rational.h>
using namespace std;
using namespace cln;
class LinearEquation{
public:
// constructor
LinearEquation(cl_R* coefficients, int numFactors, cl_R constant);
// copy constructor
LinearEquation(const LinearEquation& le);
// assignment constructor
LinearEquation& operator=(const LinearEquation& rhs);
// destructor
~LinearEquation();
/*
isSolution returns true if a provided set of rational numbers is a solution
to this linear Equation, and false otherwise.
No error checking is done, thus s and num is expected to match the number
of items in _coefficients;
*/
bool isSolution(const cl_R* s, int num);
private:
int _numFactors;
cl_R* _coefficients;
cl_R _constant;
};
LinearEquation.cpp:
#include "LinearEquation.h"
// constructor
LinearEquation::LinearEquation(cl_R* coefficients,
int numFactors,
cl_R constant){
_numFactors = numFactors;
_coefficients = new cl_R[numFactors];
for(int i=0; i<numFactors; i++){
_coefficients[i] = coefficients[i];
}
_constant = constant;
}
// copy constructor
LinearEquation::LinearEquation(const LinearEquation& obj){
_numFactors = obj._numFactors;
_coefficients = new cl_R[_numFactors];
for(int i=0; i<_numFactors; i++){
_coefficients[i] = obj._coefficients[i];
}
_constant = obj._constant;
}
// assignment constructor
LinearEquation& LinearEquation::operator=(const LinearEquation& le){
if(this != &le){
_numFactors = le._numFactors;
delete [] _coefficients;
_coefficients = new cl_R[_numFactors];
for(int i=0; i<_numFactors; i++){
_coefficients[i] = le._coefficients[i];
}
_constant = le._constant;
}
}
// destructor
LinearEquation::~LinearEquation(){
delete [] _coefficients;
}
bool LinearEquation::isSolution(const cl_R* s, int num){
cl_R sum = 0;
for(int i=0; i<_numFactors; i++){
sum = sum + (_coefficients[i] * s[i]);
}
return sum == _constant;
}
そして最後に、main.cppに
#include <cln/integer.h>
#include <cln/real.h>
#include "LinearEquation.h"
#include <iostream>
using namespace cln;
using namespace std;
int main(){
int le1NumFactors = 2;
cl_R* le1Coefficients = new cl_R[le1NumFactors];
le1Coefficients[0] = 3;
le1Coefficients[1] = 2;
cl_R le1Constant = 7;
LinearEquation le1(le1Coefficients, le1NumFactors, le1Constant);
int le2NumFactors = 2;
cl_R* le2Coefficients = new cl_R[le2NumFactors];
le2Coefficients[0] = -1;
le2Coefficients[1] = 1;
cl_R le2Constant = 6;
LinearEquation le2(le2Coefficients, le2NumFactors, le2Constant);
cl_R* solution = new cl_R[le2NumFactors];
solution[0] = -1;
solution[1] = 5;
cout << "(-1, 5) is " << (le1.isSolution(solution, 2) ? "" : "not ")
<< "a solution to le1." << endl;
cout << "(-1, 5) is " << (le2.isSolution(solution, 2) ? "" : "not ")
<< "a solution to le2." << endl;
delete [] le1Coefficients;
delete [] le2Coefficients;
delete [] solution;
return 0;
}
グラム++ LinearEquation.h LinearEquation.cpp -c
が正常に動作しますが、
グラム++ main.cppにLinearEquation.o
はしていません。次のエラーメッセージが生成されます
lowerkeyする@カシオペア:〜/デスクトップ/数学$ G ++ main.cppにLinearEquation.o /tmp/ccMceM9l.o:機能で
__static_initialization_and_destruction_0(int, int)': main.cpp:(.text+0x4ab): undefined reference to
CLN :: cl_random_def_init_helper :: cl_random_def_init_helper( ')。 main.cppに:(テキスト+ 0x4b0):未定義の参照にcln::cl_random_def_init_helper::~cl_random_def_init_helper()' main.cpp:(.text+0x4e0): undefined reference to
CLN :: cl_FF_globals_init_helper :: cl_FF_globals_init_helper()' main.cppに:(テキスト+ 0x4e5):未定義の参照にcln::cl_FF_globals_init_helper::~cl_FF_globals_init_helper()' main.cpp:(.text+0x509): undefined reference to
CLN :: cl_DF_globals_init_helper :: cl_DF_globals_init_helper() ' main.cpp :(。テキスト+ 0x50e):未定義参照cln::cl_DF_globals_init_helper::~cl_DF_globals_init_helper()' main.cpp:(.text+0x532): undefined reference to
CLN :: cl_LF_globals_init_helper :: cl_LF_globals_init_helper() ' main.cppに:(テキスト+ 0x537):。cln::cl_LF_globals_init_helper::~cl_LF_globals_init_helper()' /tmp/ccMceM9l.o: In function
CLN :: cl_gc_dec_pointer_refcountに未定義の参照(CLN :: cl_heap *)': main.cppに:(テキスト。 _ZN3cln26cl_gc_dec_pointer_refcountEPNS_7cl_heapE [CLN :: cl_gc_dec_pointer_refcount(CLN :: cl_heap *)] +の0x28):cln::cl_free_heap_object(cln::cl_heap*)' /tmp/ccMceM9l.o: In function
CLN :: cl_I_classes_dummy :: cl_I_classes_dummy() 'に 未定義参照: main.cppに:(text._ZN3cln18cl_I_classes_dummyC1Ev [CLN :: cl_I_classes_dummy。 :cl_I_classes_dummy()] + 0x9): 未定義参照LinearEquationcln::cl_class_fixnum' LinearEquation.o: In function
へ:: isSolution(CLN :: CL_Rのconst *、int型) ': LinearEquation.cpp :(テキスト+ 0x61a):。cln::operator*(cln::cl_R const&, cln::cl_R const&)' LinearEquation.cpp:(.text+0x636): undefined reference to
CLNへの未定義参照::演算子+(cln :: cl_R const &、CLN :: CL_RのCONST &) 'LinearEquation.o: 機能__static_initialization_and_destruction_0(int, int)': LinearEquation.cpp:(.text+0x741): undefined reference to
でCLN :: cl_random_def_init_helper :: cl_random_def_init_helper()' LinearEquation.cpp :(テキスト+ 0x746)。 に未定義参照cln::cl_random_def_init_helper::~cl_random_def_init_helper()' LinearEquation.cpp:(.text+0x76a): undefined reference to
CLN :: cl_FF_globals_init_helper。 :cl_FF_globals_init_helper() ' LinearEquation.cpp :(テキスト+ 0x76f):cln::cl_FF_globals_init_helper::~cl_FF_globals_init_helper()' LinearEquation.cpp:(.text+0x793): undefined reference to
CLN :: cl_DF_globals_init_helper :: cl_DF_globals_init_helper()に未定義の参照'cln::cl_DF_globals_init_helper::~cl_DF_globals_init_helper()' LinearEquation.cpp:(.text+0x7bc): undefined reference to
CLNに未定義参照。 LinearEquation.cpp :(テキスト+ 0x798) :: cl_LF_globals_init_helper :: cl_LF_globals_init_helper() ' LinearEquation.cpp :(。テキスト+ 0x7c1):cln::cl_LF_globals_init_helper::~cl_LF_globals_init_helper()' LinearEquation.o: In function
CLNに未定義の参照::演算子==(CLN :: CL_RのCONST &、 CLN :: CL_RのCONST &) ': LinearEquation.cpp :(text._ZN3clneqERKNS_4cl_RES2_ [CLN ::演算子= =(CLN :: CL_R CONST &、CLN :: CL_RのCONST &)] + 0x14に): `CLNに未定義の参照::等しい(CLN :: CL_RのCONST &、CLN :: CL_RのCONST &)」collect2は:LD 終了ステータス
はCLN –
ためのライブラリをリンクします。最近ではトロールがたくさんあります。質問にはすべての可能な情報が含まれており、よく書かれています。 – Vangel