C++ (Non Visual C++ Issues) | Forum profile

The Boost MPL probably contains a way to do it. I'm not familiar enough with it to know exactly, how, though.

The code is indeed erroneous. You need to qualify superclass functions and a typename is missing: Code: #include <vector> #include <map> /* HashMap class template; A usage example for vector, map, and function objects. Written by Rodney Myers, 3/4/00 */ namespace Containers { template <class Key, class Value, class HashFunc, class Pred=std::less<Key> > class HashMap: private...

Quote: Originally Posted by potatoCode Would you prefer the solution on a silver plater like this Code: #include <iostream> #include <string> int main() { std::string ll1l; for(int ll(0), lll(4000),l1(0), ll1(5), l1l(100); ll++ != ll1 && (std::cout << "Sales amount: ", std::cin >>l1); std::cout << ll1l.append((l1 < 0 ||l1 >...

Quote: Originally Posted by cpengr That crossed my mind. Ironically, part of what drew me to STL containers was not having to manage memory... Well, you do not have the manage the memory of the dynamic array of pointers even though you have to manage the memory for the object associated with each pointer. Quote: Originally Posted by cpengr oh well, guess I can't have my cake & eat it, too...but I do like to know what kinds of...

okay well maybe the programming world is not for me then im just a student trying to pass the class that my teacher did not teach because i asked 5/25 students in the class and the teacher did not teach this material.

Quote: Originally Posted by karnavor Hello, If I create an object on the heap, then are the attributes of the object also stored on the heap? Eg. Code: class My_Class1 {}; class My_Class2 { public: My_Class1 x; My_Class2 *y; My_Class2() { x = My_Class1(); y = new My_Class1(); }; }; int main() { My_Class2 *my_object = new My_Class2(); } So my_object is created on the heap. When it's constructor is called, it also creates two instances of...

At the point when the function call is made, v.back() is a valid reference. So I would argue it is the responsibility of the vector implementation to make sure that the operation is safe. In the real world, of course, we cannot always reley on that. Also the implementor might document that re-adding existing elements to the vector is unsafe.

Quote: Originally Posted by Philip Nicoletti It is undefined to use sprintf on a std::string ... use stringstream You're right, I should have read the post more carefully. I thought he was asking about a char array.

Try this: Code: struct FileOpen{ FileOpen(FILE &* f, const char * name, const char * mode){ f = fopen(name, mode); fp = f; } ~FileOpen(void){ if (fp) fclose(fp); } FILE * fp; }; FILE * myfile; FileOpen fo(myfile, "c:\\test.txt", "w"); if (!myfile) return; That code will automatically close your file for you.

Quote: for ( store1 = 0; store1 / 100; ++store1 ) ? let's think here for a moment. did store1 hold the value for the store 1? if so, you effectively destroyed its value. store1 / 100 isn't right. the first test would equal false since 0 / 100 is 0. ++store1... well would count up if it ran, but when would it stop? loop up how to use the for statement.....................