C++ "Cin" Only Reads the First Word

C++ cin only reads the first word

Using >> on a stream reads one word at a time. To read a whole line into a char array:

cin.getline(str, sizeof str);

Of course, once you've learnt how to implement a string, you should use std::string and read it as

getline(cin, str);

It would also be a very good idea to get a compiler from this century; yours is over 15 years old, and C++ has changed significantly since then. Visual Studio Express is a good choice if you want a free compiler for Windows; other compilers are available.

Getline always ignoring first word of input c++

cin >> fullName;

reads the first word of the full name.

getline(cin, fullName);

reads the rest of the name over top of the first word. Computer programs do exactly what you tell them to do and show somewhat less than zero mercy if that's the wrong thing to do.

So given John Jacob Jingleheimer Schmidt

cin >> fullName; // reads John into fullname
getline(cin, fullName); // reads  Jacob Jingleheimer Schmidt into fullname, 
                        // replacing John
cout << fullName << endl; // prints  Jacob Jingleheimer Schmidt

Solution

Remove the cin >> fullName;

getline(cin, fullName); // reads John Jacob Jingleheimer Schmidt into fullname, 
cout << fullName << endl; // prints John Jacob Jingleheimer Schmidt

C++ file output only accepts the first word

The extraction operator truncates on whitespaces. Use std::getline() to read the entire line.

Instead of:

cin >> mystring, "\n\n";

Make it:

std::getline( std::cin, mystring );

Getline only reads the first word

The problem is that you're using >> to extract the string. >> for strings normally stops on whitespace.

To read a whole line, do what you're already doing with cin—use getline:

cout << "Loading file..." << endl;
ifstream loadText(newTextFile);
getline(loadText, loadedText);
loadText >> loadedText;
loadText.close();
cout << loadedText;

How to only print the first word of a string in c++

try this:

const int SIZEB = 10;
char word[SIZEB];
cout << " Provide a word, up to 10 characters, no spaces. > " << endl;
cin.getline(word, SIZEB);

std::string input = word;
std::string firstWord = input.substr(0, input.find(" "));

cout << " The word is: " << firstWord << endl;
cout << endl;

You need to do:

#include <string>

File Input cuts off first word

Your problem is inData >> fileName; after inData.open(inFile.c_str());

It will read the first word into fileName and move the current file position.

---

Related Topics