getline

I have this code in an Objective-C class (in an Objective-C++ file): +(NSString *)readString { string res; std::getline(cin, res); return [NSString stringWithCString:res.c_str() encoding:NSASCIIStringEncoding]; } When I run it, I get a zero-length string, Every time. Never given the chance to type at the command line. Nothing. When I copy this code verbatim into main() , it works. I have ARC on under Build Settings. I have no clue what it going on. OSX 10.7.4, Xcode 4.3.2. It is a console application. It means there is input waiting to be read on the input. You can empty the input: cin.ignore

I am trying to do a simple beginner's task in C++. I have a text file containing the line "John Smith 31". That's it. I want to read in this data using an ifstream variable. But I want to read the name "John Smith" into one string variable, and then the number "31" into a separate int variable. I tried using the getline function, as follows: ifstream inFile; string name; int age; inFile.open("file.txt"); getline(inFile, name); inFile >> age; cout << name << endl; cout << age << endl; inFile.close(); The problem with this is that it outputs the entire line "John Smith 31". Is there a way I can

Seekg does not seem to work, when I reach EOF in myFile. ifstream myFile("/path/file"); for(int i; i < 10; i++){ myFile.seekg(0);//reset position in myFile while(getline(myFile, line)){ doSomething } } So, now I am opening input stream every loop: for(int i; i < 10; i++){ ifstream myFile("/path/file");//reset position in myFile while(getline(myFile, line)){ doSomething } } But I would rather seek to position 0. How can I achieve that? Joseph Mansfield Make sure you clear the error flags before the call to myFile.seekg() : myFile.clear(); After the EOF flag has ben set, you will not be able to

I would like to ask you about data input. I have a text file in the following format: 7 2 X Y 1 0 2 0.048922 3 0.0978829 4 0.146908 5 0.196019 6 0.245239 7 0.294584 The first line contains the number of rows and columns to be read in. The second line are headers. From the third line onwards it's only data. I would like to read my data into a 2D array (mat[][]) and the headers into an array of strings (title[]), which could be easily referenced later. I came this far writing the script. It can read the array numbers into the array, but not a 2D one. I was trying to declare a pointer for the

So I have a function that keeps skipping over the first getline and straight to the second one. I tried to clear the buffer but still no luck, what's going on? void getData(char* strA, char* strB) { cout << "Enter String 1: "; // Shows this line cin.clear(); cin.getline(strA, 50); // 50 is the character limit, Skipping Input cout << endl << "Enter String 2: "; // Showing This Line cin.clear(); cin.getline(strB, 50); // Jumps Straight to this line } Make sure you didn't use cin >> str . before calling the function. If you use cin >> str and then want to use getline(cin, str) , you must call cin