What does “missing template argument” mean?

I’m pretty new to C++ and this site so there are bound to be errors. When I try to compile my code I get errors like error: missing template argument before ‘b’. I’ve been searching the world for answers for hours and it has led me here. My assignment is to implement a templated class Collection … Read more

Argument list for class template is missing

First of all, this is how you should provide a definition for member functions of a class template: Secondly, those definitions cannot be put in a .cpp file, because the compiler won’t be able to instantiated them implicitly from their point of invocation. See, for instance, 

Issue with std::stol – ‘std::invalid_argument’ what(): stol

I have an issue with std::stol. All answers I have found regarding to issues with std::stol or std::stoi are dealing with C++11 compiling / building. When I use std::stol() I get the following error: Any ideas? Building with gcc -std::C++11 works fine. Note: I think this is my first C++11 expression I use.

Floating Point Exception C++ Why and what is it?

A “floating point number” is how computers usually represent numbers that are not integers — basically, a number with a decimal point. In C++ you declare them with float instead of int. A floating point exception is an error that occurs when you try to do something impossible with a floating point number, such as divide by zero.

how to define -std=c++11 as default in g++

Yes, you typically set this in a Makefile: One layer above you can also detect a suitable compiler via autoconf, cmake or whichever other meta-buildtool you might deploy. You of course play games as define g++11 as g++ -std=c++11 but such set-ups are not portable. g++-6.* will default to c++14 so at some this switch will be implicit. But it might take … Read more

How to find memory leak in a C++ code/project?

Instructions Things You’ll Need Proficiency in C++ C++ compiler Debugger and other investigative software tools 1 Understand the operator basics. The C++ operator new allocates heap memory. The delete operator frees heap memory. For every new, you should use a delete so that you free the same memory you allocated: 2 Reallocate memory only if you’ve deleted. In the code below, str acquires a … Read more

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