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作者yshihyu (yshihyu)
看板C_and_CPP
標題[問題] c++ template undefined reference
時間Sat Sep 23 01:31:11 2017
開發平台(Platform): (Ex: Win10, Linux, ...) Linux 編譯器(Ex: GCC, clang, VC++...)+目標環境(跟開發平台不同的話需列出) g++ https://www.sendspace.com/file/55crup 上面網址是我程式碼 ... g++ AbstractOptimizationProblem.cpp main.cpp 我程式馬里面有用到 template 但是我不太熟template ！ 懂的朋友可以幫我看一下原因！ Thanks 下面是錯誤訊息 /tmp/ccQ0iTvh.o: In function `LocalLeastSquaresProblem::LocalLeastSquaresProblem(int, int, ConvergenceChecker<Evaluation>*)': main.cpp:(.text+0x28): undefined reference to `AbstractOptimizationProblem<Evaluation>::AbstractOptimizationProblem(int, int, ConvergenceChecker<Evaluation>*)' /tmp/ccQ0iTvh.o:(.rodata._ZTV24LocalLeastSquaresProblem[_ZTV24LocalLeastSquaresProblem]+0x10): undefined reference to `AbstractOptimizationProblem<Evaluation>::getEvaluationCounter()' /tmp/ccQ0iTvh.o:(.rodata._ZTV24LocalLeastSquaresProblem[_ZTV24LocalLeastSquaresProblem]+0x18): undefined reference to `AbstractOptimizationProblem<Evaluation>::getIterationCounter()' -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 175.181.255.94 ※ 文章網址: https://www.ptt.cc/bbs/C_and_CPP/M.1506101475.A.142.html
推 kkmoon5566: 把constructor 設爲pure virtual function 09/23 02:22
→ kkmoon5566: AbstractOptimizationProblem(int maxEvaluations, in 09/23 02:22
→ kkmoon5566: t maxIterations, ConvergenceChecker<PAIR>* checker 09/23 02:22
→ kkmoon5566: <PAIR>* checker)=0; 09/23 02:23
→ yshihyu: AbstractOptimizationProblem.h:10:5: error: initialize 09/23 02:29
→ yshihyu: specified for non-virtual method 09/23 02:29
→ yshihyu: 改成 = 0 編譯變成這樣錯誤 09/23 02:30
推 kkmoon5566: 講錯了= =" sorry 09/23 11:48
推 kkmoon5566: 這樣好像可以了~ https://pastebin.com/x7csU8Cd 09/23 20:28
推 kkmoon5566: 原因是compiler不知道template class要支持什麼data 09/23 20:32
→ kkmoon5566: as the compiler does not know, while compiling Sta 09/23 20:32
→ kkmoon5566: ck.cpp by itself, the data types it should provide 09/23 20:32
→ kkmoon5566: support for. 09/23 20:33
→ kkmoon5566: 來源:https://tinyurl.com/y7qlx77b 09/23 20:33
→ yshihyu: 嗯嗯～有部份錯誤有解！ 不過 main.cpp:(.text+0x28): un 09/24 01:57
→ yshihyu: AbstractOptimizationProblem<Evaluation>::AbstractOpti 09/24 01:58
→ yshihyu: ::AbstractOptimizationProblem(int, int, ConvergenceCh 09/24 01:58
→ yshihyu: 我在main.cpp 把 AbstractOptimizationProblem(maxEvalua 09/24 02:00
→ yshihyu: 改成 AbstractOptimizationProblem<Evaluation>(maxEvalu 09/24 02:00