cin

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Program looks like: #include <iostream> #include <string> using namespace std; int main() { //Code int num1, num2, num3, num4, num5, num6; int num[6] = { num1, num2, num3, num4, num5, num6 }; cout << "Enter one line containing at least 6 integers." << endl; getline(cin, num); Line of input: 1 2 87

问题 Here I have a code: cout << "Press Enter To Exit..."; cin.ignore(); this program will execute and will wait till you press enter and then it will exit. now see this code: int m; cin >> m; cout << "Press Enter To Exit..."; cin.ignore(); this time after entering a number for saving in "m" the program will exit without waiting for cin.ignore command which waits for pressing enter. I mean if you use cin command before cin.ignore, the cin.ignore command will skip. why? and what should I do for

问题 This question already has answers here : Find the reverse of a number (ex : 2500 reverse 0025) without the help of string or character (4 answers) Closed 4 years ago . I'm in the process of recreating the old mastermind video game from the '70s. The users makes a four digit guess, which is then logged as a vector. I know there exists a way to accept the input as a string, however I would find it odd if there isn't a way to do this with one single int input -- which I haven't been able to find

问题 I have the following function: static void cmd_test(char *s) { int d = maxdepth; sscanf(s, "%*s%d", &d); root_search(d); } How can I achieve the same output in a C++ way, rather than using sscanf ? 回答1: int d = maxdepth; sscanf(s, "%*s%d", &d); Reads a string (which does not store anywhere) and then reads a decimal integer. Using streams it would be: std::string dont_care; int d = maxdepth; std::istringstream stream( s ); stream >> dont_care >> d; 来源： https://stackoverflow.com/questions

问题 I am trying to write a program which gets user's input in a specific way. First, I input a word which contains no space; Then, I input another word which may contains space; And the program outputs the 2 words separately. For example, I input "Tom a lazy boy" Then the program outputs "Tom:a lazy boy" Here is what I attempted to do: int main(){ string a; cin >> a; string b; getline(cin, b); cout << a << ":" << b<< endl; } I tried using getline after cin, however the output looks like: "Tom: a

问题 I'm trying to setup an input checking loop so it continuously ask the user for a valid (integer) input, but it seems to get trapped in an infinite loop. I've searched for solutions and tried to ignore() and clear() , but it still doesn't stop. Could you please correct me where I'm wrong here? int num; cin >> num; while (cin.fail()) { cin.ignore(); cin.clear(); cout << "Enter valid number: " << endl; cin >> num; } 回答1: When the stream is in an state of error, cin.ignore(); does not do anything

问题 I was working on the following code. #include <iostream> int main() { std::cout << "Enter numbers separated by whitespace (use -1 to quit): "; int i = 0; while (i != -1) { std::cin >> i; std::cout << "You entered " << i << '\n'; } } I know that using while (std::cin >> i) would have been better but I don't understand a specific occurrence. If I provide an invalid input, the loop becomes infinite because the Input Stream enters a failbit state. My question is that what happens to the input

问题 This question already has answers here : Why does stringstream >> change value of target on failure? (2 answers) Closed 2 years ago . So this is a really basic question and super trivial but Im just going through programming principles & practices in c++ and my program for reading in a string and a int is behaving differently than the book which is written by Bjarne Stroustrup so id be surprised if he made a mistake. Anyway here's the code: #include "..\std_lib_facilities.h" int main() { cout

问题 How can I enter an input without causing the code to stop executing? I have been searching for an answer during the last 20 minutes without result. cin >> string; pauses the code AFAIK. Would I need to use mulithreading, or is there a better way? (I don't even know if multithreading would work.) I've recently started learning c++, I am a beginner to say the least, so please explain thoroughly and include any library I might need, thank you. 回答1: There are two algorithms for getting input

问题 I am not sure if being in linux makes any different, but i have found online that this: cout << "Press Enter to Continue..."; cin.ignore(numeric_limits<streamsize>::max(),'\n'); Should be sufficient, with #include<limits> in the header of course. However, it does not seem to work in my program. It compiles, it runs, but it does not wait. Basically, i have a menu, which lead to a method call to display a list of people on the screen. I wish to pause that list before the system goes back to the