std::cin is not opened with ios_binary. If you must use cin, then you need to reopen it, which isn’t part of the standard. Some ideas here: https://comp.unix.programmer.narkive.com/jeVj1j3I/how-can-i-reopen-std-cin-and-std-cout-in-binary-mode Once it’s binary, you can use cin.read() to read bytes. If you know that in your system, there is no difference between text and binary (and you don’t … Read more
Define the macro NOMINMAX: This will suppress the min and max definitions in Windef.h.
cin is an object of class istream that represents the standard input stream. It corresponds to the cstdio stream stdin. The operator >>overload for streams return a reference to the same stream. The stream itself can be evaluated in a boolean condition to true or false through a conversion operator. cin provides formatted stream extraction. … Read more
From this reference: If extraction fails (e.g. if a letter was entered where a digit is expected), value is left unmodified and failbit is set (until C++11) If extraction fails, zero is written to value and failbit is set. If extraction results in the value too large or too small to fit in value, std::numeric_limits::max() … Read more
It skips all whitespace (spaces, tabs, new lines, etc.) by default. You can either change its behavior, or use a slightly different mechanism. To change its behavior, use the manipulator noskipws, as follows: cin >> noskipws >> a[i]; But, since you seem like you want to look at the individual characters, I’d suggest using get, … Read more
You have to be careful when mixing operator>> with getline. The problem is, when you use operator>>, the user enters their data, then presses the enter key, which puts a newline character into the input buffer. Since operator>> is whitespace delimited, the newline character is not put into the variable, and it stays in the … Read more
You can check like this: int x; cin >> x; if (cin.fail()) { //Not an int. } Furthermore, you can continue to get input until you get an int via: #include <iostream> int main() { int x; std::cin >> x; while(std::cin.fail()) { std::cout << “Error” << std::endl; std::cin.clear(); std::cin.ignore(256,’\n’); std::cin >> x; } std::cout << … Read more
Try this: while (1) { if (cin >> x) { // valid number break; } else { // not a valid number cout << “Invalid Input! Please input a numerical value.” << endl; cin.clear(); while (cin.get() != ‘\n’) ; // empty loop } } This basically clears the error state, then reads and discards everything … Read more
Let’s take std::cin.getline() apart. First, there’s std::. This is the namespace in which the standard library lives. It has hundreds of types, functions and objects. std::cin is such an object. It’s the standard character input object, defined in <iostream>. It has some methods of its own, but you can also use it with many free … Read more
It is possible to change the inter-word delimiter for cin or any other std::istream, using std::ios_base::imbue to add a custom ctype facet. If you are reading a file in the style of /etc/passwd, the following program will read each :-delimited word separately. #include <locale> #include <iostream> struct colon_is_space : std::ctype<char> { colon_is_space() : std::ctype<char>(get_table()) {} … Read more