This is because you have the following code: This is not valid C++ but Visual Studio seems to accept it. You need to change it to the following code to be able to compile it with a standard compliant compiler (gcc is more compliant to the standard on this point). The error come from the … Read more
Seeing from your G++ version, you need to update it badly. C++11 has only been available since G++ 4.3. The most recent version is 4.7. In versions pre-G++ 4.7, you’ll have to use -std=c++0x, for more recent versions you can use -std=c++11.
This rule is wrong. It says to create a file named producer.o (with -o producer.o), but you want to create a file named main. Please excuse the shouting, but ALWAYS USE $@ TO REFERENCE THE TARGET: As Shahbaz rightly points out, the gmake professionals would also use $^ which expands to all the prerequisites in … Read more
When you define a variable outside the scope of a function, that variable’s value is actually written into your executable file. This means you can only use a constant value. Since you don’t know everything about the runtime environment at compile time (which classes are available, what is their structure, etc.), you cannot create objective … Read more
Declare the parameterless constructor in the header file: You are defining it in the .cpp file without actually declaring it. But since the compiler provides such a constructor by default (if no other constructor is declared), the error clearly states that you are trying to define an implicitly-declared constructor.
Today, I have started to learn PHP. And, I have created my first PHP file to test different variables. You can see my file as follows. I have found the following errors when I have run this file in the browser. Notice: Undefined variable: x in /opt/lampp/htdocs/anand/php/index.php on line 19 Notice: Undefined variable: y in … Read more
The way to think about this is to “think like a compiler”. Imagine you are writing a compiler. And you see code like this. When you are compiling the .cc file (remember that the .cc and not the .h is the unit of compilation), you need to allocate space for object A. So, well, how much space then? Enough to store B! What’s … Read more
I may guess, the old instance of your program is still running. Windows does not allow to change the files which are currently “in use” and your linker cannot write the new .exe on the top of the running one. Try stopping/killing your program.
I had this happen to me about a year ago and I don’t remember exactly what the root cause was, but there are two things you might try: If it’s an auto-generated file (as ‘Resources.Designer.cs’ tend to be), try deleting it and letting VS re-generate it. Either separately or in conjunction with #1, select Show All … Read more
You need to convert sc.nextLine into int