How to pass optional arguments to a method in C++?
Here is an example of passing mode as optional parameter you can call myfunc in both ways and both are valid
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Correct way to use cin.fail()
cin.fail() returns true if the last cin command failed, and false otherwise. An example: Now suppose you have a text file – input.txt and it’s contents are: When you will run above short program on that, it will result like: it will not continue after 6th value as it quits after reading the seventh word, because that … Read more
C++ how to read a line with delimiter until the end of each line?
Hi I need to read a file that looks like this… As you can see the type of each movie can vary from 1 type to many…I wonder how could I read those until the end of each line? I’m currently doing: the result is not what I want…It looks like: So it doesn’t stop … Read more
What’s the difference between char and char* in C++?
The variables with the * are pointers. A ‘normal’ variable, for example a char or an int, contains the value of that datatype itself – the variable can hold a character, or an integer. A pointer is a special kind of variable; it doesn’t hold the value itself, it contains the address of a value in memory. … Read more
Does C++ have a Garbage Collector?
Native C++ by default has no such thing (the closest thing to this are the smart pointers, but that’s still something entirely different), but that doesn’t prevent you from writing your own garbage collection solution (or using third party solution). Managed C++ (and its successor C++/CLI) of course use .NET garbage collection for managed resources (though … Read more
C++ on mac : linker command failed with exit code 1 (use -v to see invocation)
You can only have one main() – you decide which one you need to keep and which one needs to be deleted. Keep only one page, with the main() method.
cin >> “no operator matches these operands”
I’ve been working on a C++ project in visual studio 2012 console mode and I keep getting this strange persistent error with the cin function. Under the >> I get a red line and the program tells me no operator matches these operands. I have initialized all the array elements in a separate method. Here’s a snippet example (The actual … Read more
basic_string::_M_construct null not valid after constructing subvector of strings
The chunk vector ceases to exist at the end of the for loop body. It’s still referenced by some thread. That’s called a dangling reference, and it’s not good. The error that you see may however be related to Result. Its definition isn’t provided (at the time of writing this answer) so it’s difficult to say. Remember that as the one … Read more
Correct way of looping through C++ arrays
In C/C++ sizeof. always gives the number of bytes in the entire object, and arrays are treated as one object. Note: sizeof a pointer–to the first element of an array or to a single object–gives the size of the pointer, not the object(s) pointed to. Either way, sizeof does not give the number of elements in the array (its length). To get the … Read more
Sorting Characters Of A C++ String
There is a sorting algorithm in the standard library, in the header <algorithm>. It sorts inplace, so if you do the following, your original word will become sorted. If you don’t want to lose the original, make a copy first.