‘cout’ was not declared in this scope

Put the following code before int main(): And you will be able to use cout. For example: Now take a moment and read up on what cout is and what is going on here: http://www.cplusplus.com/reference/iostream/cout/ Further, while its quick to do and it works, this is not exactly a good advice to simply add using namespace std; at the top … Read more

streambuf::xsgetn and state flags

This is what I found on libstdc++: When the characters extracted are less than the number of characters requested, this function calls uflow() to obtain more characters. If that function returns Traits::eof() then it will simply return whether or not 0 characters were extracted. The result of the function call is picked up by the higher-level stream operations that … Read more

‘cout’ was not declared in this scope

Put the following code before int main(): And you will be able to use cout. For example: Now take a moment and read up on what cout is and what is going on here: http://www.cplusplus.com/reference/iostream/cout/ Further, while its quick to do and it works, this is not exactly a good advice to simply add using namespace std; at the top … Read more

What are the rules of the std::cin object in C++?

What is happening here is that std::cin >> firstName; only reads up to but not including the first whitespace character, which includes the newline (or ‘\n’) when you press enter, so when it gets to getline(std::cin, articleTitle);, ‘\n’ is still the next character in std::cin, and getline() returns immediately. Adding ‘std::cin >> std::ws‘ (ws meaning … Read more

How to read a file line by line or a whole text file at once?

ou can use std::getline : Also note that it’s better you just construct the file stream with the file names in it’s constructor rather than explicitly opening (same goes for closing, just let the destructor do the work). Further documentation about std::string::getline() can be read at CPP Reference. Probably the easiest way to read a whole text file is just … Read more