In file included from MPIGAGeneticAlgorithm.cpp:15: 
MPIGAGeneticAlgorithm.h: In method 
`MPIGAGeneticAlgorithm::~MPIGAGeneticAlgorithm ()': 
MPIGAGeneticAlgorithm.h:36: parse error before `[' 
MPIGAGeneticAlgorithm.cpp: In method `void 
MPIGAGeneticAlgorithm::buildPrecedenceArray ()': 
MPIGAGeneticAlgorithm.cpp:361: `size' undeclared (first use this 
function) 
MPIGAGeneticAlgorithm.cpp:361: (Each undeclared identifier is reported 
only once for each function it appears in.) 
MPIGAGeneticAlgorithm.cpp:374: `x' undeclared (first use this function)

引言: 我想大概是size 跟x沒有宣告 但是我在cpp檔裡的void xxxx{int size; int x } 還是會有錯誤那大概是哪裡錯誤呢

請問 void xxxx{int size; int x } 是什麼？函式不應該是

void xxxx(int size,int x)
{
  // 程式
}

像您這樣的問題，資料太少，別人不容易幫您的， 可能的話，把您有問題的地方獨立出來測試，如果還有問題， 再把相關的 code post 上來，別人才容易看懂您的問題， 否則，只說 compile 後有問題，如果是還沒到 link 之前就有問題，都是語法上的問題，我只能說，多多看一下書吧 <>沒空更新的網頁... href="http://dllee.adsldns.org">http://dllee.adsldns.org 介紹Shells,LiteStep,GeoShell....

引言: [quote] 我想大概是size 跟x沒有宣告 但是我在cpp檔裡的void xxxx{int size; int x } 還是會有錯誤那大概是哪裡錯誤呢

請問 void xxxx{int size; int x } 是什麼？函式不應該是

void xxxx(int size,int x)
{
  // 程式
}

像您這樣的問題，資料太少，別人不容易幫您的， 可能的話，把您有問題的地方獨立出來測試，如果還有問題， 再把相關的 code post 上來，別人才容易看懂您的問題， 否則，只說 compile 後有問題，如果是還沒到 link 之前就有問題，都是語法上的問題，我只能說，多多看一下書吧 抱歉我會改善的 上面的問題原來是用錯了;號 可是還是有宣告上的問題 看不懂還請多指教 < class="code"> 標頭檔 宣告大概如下 MPIGAGenome** bestArray; /* This will hold the best * genomes found from each population */ /* This sets up the precedenceArray based on current neighborhood size */ void buildPrecedenceArray(); private: unsigned int fmigration; //This is the frequency of migration unsigned int tmigrations; //This is the number of migrations so far unsigned int nmigrate; //This is the number of specimens to migrate unsigned int npopulations; //This will be set to the number of nodes. unsigned int rank; //This will hold the MPI Rank of the //The system the object is instantiated on. unsigned int neighs; //The number of demes in my neighborhood. MPIGAMigrationType migrationType; //What type of migration are we using? MPIGAReplacementType replacement; //What migration policy are we using? GAGeneticAlgorithm* gaalgorithm; //A genetic algorithm from GALib //is pointed at by this. int ** precedenceArray; /* This is a matrix of integers that will be * used for figuring out migration ordering * in STEPPINGSTONE migration. */ MPIGAGenome* best; /* The best found in any population */ .cpp檔的宣告如下 void MPIGAGeneticAlgorithm::buildPrecedenceArray(){ if (precedenceArray==NULL){ precedenceArray = new int[size][neighbors()]; } //Set the array to something other than 0 or 1; for(int i = 0; i 能幫我看看哪裡錯了嗎

引言:MPIGAGeneticAlgorithm.cpp: In method `void MPIGAGeneticAlgorithm::buildPrecedenceArray ()': MPIGAGeneticAlgorithm.cpp:361: `size' undeclared (first use this function)

→ 不會是英文看不懂吧 → 就是 >< face="Verdana, Arial, Helvetica">引言:MPIGAGeneticAlgorithm.cpp:361: (Each undeclared identifier is reported only once for each function it appears in.)

→ 看不懂 <>< face="Verdana, Arial, Helvetica">引言:MPIGAGeneticAlgorithm.cpp:374: `x' undeclared (first use this function)