StackOverflow2013

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copied!<p>Where is the closing bracket of the for loop? </p> <pre><code>void checkList() { for (int i = 0; i < index ;i++){ next = basePrt[i]; next -> baseFunc(); //fails here } // this one is missing in the example ! } </code></pre> <hr> <p>Use a vector ...</p> <pre><code>class SomeClassUseBase { private: std::vector<Base*> basePrt; public: void register( Base * base ){ basePrt.push_back(base); } void checkList() { std::for_each( basePrt.begin(), basePrt.end(), std::mem_fun(&Base::baseFunc); } </code></pre> <p>};</p> <hr> <p>This works for me. It's not the code i would write for my projects but it works.</p> <pre><code>class SomeClassUseBase; class Base { // This base class is pure abstract public: virtual ~Base() {} // Necessary to trigger destructors in inherited classes virtual void baseFunc() = 0; }; class DerivedA : public Base { public: DerivedA(SomeClassUseBase * tmp){ tmp -> registerIt(this); } void baseFunc(){ // do something here that's only for DerivedA } }; class DerivedB : public Base { public: DerivedB(SomeClassUseBase * tmp){ tmp -> registerIt(this); } void baseFunc() { // do something here that's only for DerivedB } }; class SomeClassUseBase { private: Base ** basePrt; //Remark: use a vector or shared_array unsigned int index; SomeClassUseBase(const SomeClassUseBase&); const SomeClassUseBase& operator=(const SomeClassUseBase&); public: explicit SomeClassUseBase(int num) { //Remark: Store the size of the container basePrt = new Base*[num]; //create an array of pointers to the objects index = 0; } ~SomeClassUseBase() { delete[] basePrt; } void registerIt( Base * base ) { //Remark: what if index >= size of the array? basePrt[index] = base; index = index + 1; } void checkList() const { for (int i = 0; i < index ;i++){ Base *next = basePrt[i]; next->baseFunc(); } } }; int main() { SomeClassUseBase tmp(5); Base *b[5]; //Remark: Use a smart_pointer for ( int i = 0; i < 5; i += 1 ) { if ( i % 2 == 0 ) { b[i] = new DerivedA(&tmp); } else { b[i] = new DerivedB(&tmp); } // if } // for tmp.checkList(); for(int i = 0; i < 5; ++i ) { delete b[i]; } } </code></pre>

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