Programming Forums > Application Development > C++

Kazy · Sep 13th, 2005, 3:16 PM

For some reason I'm getting an error when I try to use getline(). Its very simple code and for some reason I can't figure out why its giving me the error.. its stopping at:

cout << "Enter a number: ";
cin.getline(data, 101); // read in number into variable

and giving me the error:
sender.cpp: In function `int main()':
sender.cpp:33: error: no matching function for call to `
std::basic_istream<char, std::char_traits<char> >::getline(std::string&, int
)'
/usr/include/c++/3.3.4/bits/istream.tcc:594: error: candidates are:
std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
_Traits>::getline(_CharT*, int, _CharT) [with _CharT = char, _Traits =
std::char_traits<char>]
/usr/include/c++/3.3.4/istream:401: error:
std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
_Traits>::getline(_CharT*, int) [with _CharT = char, _Traits =
std::char_traits<char>]

any ideas on why i'm getting this error?

Polyphemus_ · Sep 13th, 2005, 3:20 PM

firstly, what type has data? probably a string? If so, use this code:

(Toggle Plain Text)

getline(cin, data, '\n');

secondly, use code tags

Kazy · Sep 13th, 2005, 3:21 PM

data is a string

Polyphemus_ · Sep 13th, 2005, 3:22 PM

Quote:

Originally Posted by Kazy

data is a string

yap, i already saw it in your compile errors. see the edit of my post

Kazy · Sep 13th, 2005, 3:26 PM

I'm sure this is a stupid question, but what is a code tag?

Polyphemus_ · Sep 13th, 2005, 3:38 PM

Quote:

Originally Posted by Kazy

I'm sure this is a stupid question, but what is a code tag?

code tags are to create such blocks of code:

(Toggle Plain Text)

void piece_of_code(void) {

}

Just put the piece of code between [ code] and [/ code] (without spaces).

Kazy · Sep 13th, 2005, 3:57 PM

ahh, well here is my code: maybe this will help find the problem

(Toggle Plain Text)

#include <iostream>
#include <string>  // For string class usage
#include <fstream> // For file I/O


using namespace std;

#define SEND 1;
#define CLOSE 2;

int main( void )
{


        string data;       // String to store input from user
        ofstream outData;  // Output stream to store data to file
        ofstream myPipe;   // Output stream for named pipe
        bool flag=false;   // For checking correct input
        bool exitFlag=false;
        // Create the named pipe to communicate with other app
        system("mkfifo myPipe");



        // Output Header Info
        cout << "Sender" << endl;
        cout << "Written by Brian Kays" << endl;
        cout << endl;
        while (!exitFlag)
        {
                cout << "Enter a number: ";

                cin.getline(data, 101); // read in number into variable
                cout << "Data: " << data << " : Data Length: " << data.length() <<  endl;
                if (data == "")
                {
                        myPipe.open("myPipe");
                        myPipe << CLOSE;
                        exit(1);
                }
                for (int i=0; i<data.length(); i++)
                {
                        if (flag == false && data.substr(i, 1) >= "a")
                        {
                                flag = true;
                                cout << "Not valid input!" << endl;
                        }
                }

                outData.open("data.txt"); // open the file

                if(!outData)   // Check to see if file was opened.
                {
                        cout << "Error opening the file! Aborting..." << endl;
                        exit(1); // Exit program if file was not successfully opened.
                }

                if (flag == false)
                {
                        outData << data << endl;
                        cout << "Writing number to file..." << endl;

                        outData.close();

                        myPipe.open("myPipe");
                        myPipe << SEND; // Send msg to receiver
                }
                else
                {
                        outData.close();
                        flag = false;
                }
                myPipe.close(); // Close pipe
        }
        return 0;
}

#include <iostream>
#include <string>  // For string class usage
#include <fstream> // For file I/O


using namespace std;

#define SEND 1;
#define CLOSE 2;

int main( void )
{


        string data;       // String to store input from user
        ofstream outData;  // Output stream to store data to file
        ofstream myPipe;   // Output stream for named pipe
        bool flag=false;   // For checking correct input
        bool exitFlag=false;
        // Create the named pipe to communicate with other app
        system("mkfifo myPipe");



        // Output Header Info
        cout << "Sender" << endl;
        cout << "Written by Brian Kays" << endl;
        cout << endl;
        while (!exitFlag)
        {
                cout << "Enter a number: ";

                cin.getline(data, 101); // read in number into variable
                cout << "Data: " << data << " : Data Length: " << data.length() <<  endl;
                if (data == "")
                {
                        myPipe.open("myPipe");
                        myPipe << CLOSE;
                        exit(1);
                }
                for (int i=0; i<data.length(); i++)
                {
                        if (flag == false && data.substr(i, 1) >= "a")
                        {
                                flag = true;
                                cout << "Not valid input!" << endl;
                        }
                }

                outData.open("data.txt"); // open the file

                if(!outData)   // Check to see if file was opened.
                {
                        cout << "Error opening the file! Aborting..." << endl;
                        exit(1); // Exit program if file was not successfully opened.
                }

                if (flag == false)
                {
                        outData << data << endl;
                        cout << "Writing number to file..." << endl;

                        outData.close();

                        myPipe.open("myPipe");
                        myPipe << SEND; // Send msg to receiver
                }
                else
                {
                        outData.close();
                        flag = false;
                }
                myPipe.close(); // Close pipe
        }
        return 0;
}

Kazy · Sep 13th, 2005, 4:01 PM

oh sorry, didn't see your update, let me try that

Sep 13th, 2005, 3:16 PM	#1
Kazy Newbie Join Date: Sep 2005 Posts: 21 Rep Power: 0	cin.getline() error For some reason I'm getting an error when I try to use getline(). Its very simple code and for some reason I can't figure out why its giving me the error.. its stopping at: cout << "Enter a number: "; cin.getline(data, 101); // read in number into variable and giving me the error: sender.cpp: In function `int main()': sender.cpp:33: error: no matching function for call to ` std::basic_istream<char, std::char_traits<char> >::getline(std::string&, int )' /usr/include/c++/3.3.4/bits/istream.tcc:594: error: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int, _CharT) [with _CharT = char, _Traits = std::char_traits<char>] /usr/include/c++/3.3.4/istream:401: error: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::getline(_CharT, int) [with _CharT = char, _Traits = std::char_traits<char>] any ideas on why i'm getting this error?

Sep 13th, 2005, 3:20 PM	#2
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	firstly, what type has data? probably a string? If so, use this code: (Toggle Plain Text) getline(cin, data, '\n'); getline(cin, data, '\n'); secondly, use code tags

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Sep 13th, 2005, 3:21 PM	#3
Kazy Newbie Join Date: Sep 2005 Posts: 21 Rep Power: 0	data is a string

Sep 13th, 2005, 3:26 PM	#5
Kazy Newbie Join Date: Sep 2005 Posts: 21 Rep Power: 0	I'm sure this is a stupid question, but what is a code tag?

Sep 13th, 2005, 3:57 PM	#7
Kazy Newbie Join Date: Sep 2005 Posts: 21 Rep Power: 0	ahh, well here is my code: maybe this will help find the problem (Toggle Plain Text) #include <iostream> #include <string> // For string class usage #include <fstream> // For file I/O using namespace std; #define SEND 1; #define CLOSE 2; int main( void ) { string data; // String to store input from user ofstream outData; // Output stream to store data to file ofstream myPipe; // Output stream for named pipe bool flag=false; // For checking correct input bool exitFlag=false; // Create the named pipe to communicate with other app system("mkfifo myPipe"); // Output Header Info cout << "Sender" << endl; cout << "Written by Brian Kays" << endl; cout << endl; while (!exitFlag) { cout << "Enter a number: "; cin.getline(data, 101); // read in number into variable cout << "Data: " << data << " : Data Length: " << data.length() << endl; if (data == "") { myPipe.open("myPipe"); myPipe << CLOSE; exit(1); } for (int i=0; i<data.length(); i++) { if (flag == false && data.substr(i, 1) >= "a") { flag = true; cout << "Not valid input!" << endl; } } outData.open("data.txt"); // open the file if(!outData) // Check to see if file was opened. { cout << "Error opening the file! Aborting..." << endl; exit(1); // Exit program if file was not successfully opened. } if (flag == false) { outData << data << endl; cout << "Writing number to file..." << endl; outData.close(); myPipe.open("myPipe"); myPipe << SEND; // Send msg to receiver } else { outData.close(); flag = false; } myPipe.close(); // Close pipe } return 0; } #include <iostream> #include <string> // For string class usage #include <fstream> // For file I/O using namespace std; #define SEND 1; #define CLOSE 2; int main( void ) { string data; // String to store input from user ofstream outData; // Output stream to store data to file ofstream myPipe; // Output stream for named pipe bool flag=false; // For checking correct input bool exitFlag=false; // Create the named pipe to communicate with other app system("mkfifo myPipe"); // Output Header Info cout << "Sender" << endl; cout << "Written by Brian Kays" << endl; cout << endl; while (!exitFlag) { cout << "Enter a number: "; cin.getline(data, 101); // read in number into variable cout << "Data: " << data << " : Data Length: " << data.length() << endl; if (data == "") { myPipe.open("myPipe"); myPipe << CLOSE; exit(1); } for (int i=0; i<data.length(); i++) { if (flag == false && data.substr(i, 1) >= "a") { flag = true; cout << "Not valid input!" << endl; } } outData.open("data.txt"); // open the file if(!outData) // Check to see if file was opened. { cout << "Error opening the file! Aborting..." << endl; exit(1); // Exit program if file was not successfully opened. } if (flag == false) { outData << data << endl; cout << "Writing number to file..." << endl; outData.close(); myPipe.open("myPipe"); myPipe << SEND; // Send msg to receiver } else { outData.close(); flag = false; } myPipe.close(); // Close pipe } return 0; }

Sep 13th, 2005, 4:01 PM	#8
Kazy Newbie Join Date: Sep 2005 Posts: 21 Rep Power: 0	oh sorry, didn't see your update, let me try that

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Programming Forums > Application Development > C++

cin.getline() error