new type requires deletenew type[size] requires delete []Using one instead of the other is wrong. Btw you should not use such raw pointers like this unless you have a very good reason. Use std::vector or std::array instead. And 2D MxN arrays should generally be linearised into 1D M*N arrays, also using these containers.
Could you provide a whole makefile? But right now I can tell – you should check that “install” target already exists. So, check Makefile whether it contains a line. If not, there is no such target and so make has right. Probably you should use just “make” command to compile and then use it as … Read more
The short answer for this is, “because that’s what the C++ standard specifies”. Note that you can always specify a constructor that’s different from the default, like so: The default constructor of the base class is called only if you don’t specify which one to call.
Yes, you can input multiple items from cin, using exactly the syntax you describe. The result is essentially identical to: This is due to a technique called “operator chaining”. Each call to operator>>(istream&, T) (where T is some arbitrary type) returns a reference to its first argument. So cin >> a returns cin, which can … Read more
Neither <iostream> nor <iostream.h> are standard C header files. Your code is meant to be C++, where <iostream> is a valid header. Use a C++ compiler such as clang++ or g++ (and a .cpp file extension) for C++ code. Alternatively, this program uses mostly constructs that are available in C anyway. It’s easy enough to … Read more
See http://www.cplusplus.com/doc/tutorial/files/ for more information on files in C++. edit: this answer is not correct since tellg() does not necessarily return the right value. See http://stackoverflow.com/a/22986486/1835769
You are not inputting or outputting the characters correctly. char letter[2] is an array of 2 characters, not a single character. You want char letter. Further, you are outputting letter[2], which is the third element of an array that only has two values (indexing in C++ starts from 0; the first element is letter[0] and … Read more
I am pretty new to C++ and am trying to make a simple die roll with a Die class/main. I can get a random number within my range 1-dieSize, however, each time I “roll the dice” it just gives me the same random number. For example, when I roll this dice three times, it will … Read more
Static type checking means that type checking occurs at compile time. No type information is used at runtime in that case. Dynamic type checking occurs when type information is used at runtime. C++ uses a mechanism called RTTI (runtime type information) to implement this. The most common example where RTTI is used is the dynamic_cast … Read more
What is the difference between the dot (.) operator and -> in C++?