soo stupid, what am i doin???

blizunt7 · 07-04-2005, 01:19 AM

hey all i cant believe i cant get this working:

<code>

char test[80];
cout << "enter a Full Sentence: ";
cin.getline(test,80);

<code>

the getline DOES NOT WORK????

, and program execution just continues with the next line of code after getline.

i have also tried:
cin.read(test, 80);

but this required that i type exactly 80 chars before input stream exits.

WHat am i doin wrong?? soo stupid i know

Josh

blizunt7 · 07-04-2005, 01:39 AM

just a side note, i am running a g++ compiler on a Fedora Core 3 .
THanks.

JUst need to capture user input, in full sentences.

Josh

keefaz · 07-04-2005, 10:11 AM

Try use C++ strings rather than C char arrays

Code:

#include <iostream>

using namespace std;

int main(int argc, char * argv[]) {
    string test;
    cout << "enter a Full Sentence: ";
    getline(cin, test);
    cout << "You entered: \"" << test << "\"\n";
    return 0;
}

rjlee · 07-04-2005, 01:51 PM

Quote:

Originally posted by blizunt7
hey all i cant believe i cant get this working:

<code>

char test[80];
cout << "enter a Full Sentence: ";
cin.getline(test,80);

<code>

the getline DOES NOT WORK???? , and program execution just continues with the next line of code after getline.

i have also tried:
cin.read(test, 80);

but this required that i type exactly 80 chars before input stream exits.

WHat am i doin wrong?? soo stupid i know

Josh

It would help if you posted a complete program. The following code works for me:

Code:

#include <iostream>

int main() {
  using namespace std;

  for (int i=0; i < 3; ++i) {
    char test[80];
    cout << "enter a Full Sentence: ";
    cin.getline(test,80);
    cout << test << endl;
  }
}

Of course if you type more than 80 characters, this will give you a buffer overrun and a big security hole, so you're better off using a C++ string object.

Which version of GCC/c++ are you using? In case you don't know, GCC-2.96 (http://gcc.gnu.org/gcc-2.96.html) was released by Red Hat, is not a GNU project, has lots of iostream-related bugs, and isn't even a C++ compiler, so I would not be very surprised if it didn't compile that code properly.

blizunt7 · 07-04-2005, 01:56 PM

thank you, im not too happy right now.

I tired this as its own program, just the few lines and it worked, i entered a sentence and it output to screen fine.

BUt when i put this in my code, the get sentence is totaly skipped over????

i have other cout statemetns, and cin statements to capture single word inputs, (no spaces)
and then i have this:

string test;
cout << "sentence";
getline(cin, test);
cout << "Entered sentence was : " << test << endl;

:
:
more code.....

What is my problem???

WHy is this code (to enter a sentence) totaly skipped????
thanks you

rjlee · 07-04-2005, 02:26 PM

I can see nothing wrong with this snippet of code. Thus it is likely that the problem lies elsewhere in your program.

As previously stated, please post a complete program that fails, and the version of the C++ compiler that you're using.

The only other idea that springs to mind is that you might be using ctrl+D (EOF) to end the input stream after the first input; this would close standard input and allow nothing further to be read from it.

blizunt7 · 07-04-2005, 03:16 PM

sorry, for not uncluding all the code. There is my function that is called from main:

int main(void)
{

system("clear");
renewItem();

//initData(); // file will read file, and input into ADT at this point
initMenu();

return 0;
}

Everything else works fine, except for this single sentence input????
I am using gcc version 3.4.2
Thanks !!!!!

Code:

void newItem()
{
    char cont;
    char number[80], weightDwt[80], weightGram[80];
    char gold[80], description[80], price[80];


    ofstream fout;  // object for writing to file itemList
    fout.open("data.gp",ios::app);
    if (!fout.good())
    {
        cout << "Error Creating file\n";

    }
    assert (!fout.fail());

    cout << "Last item number is " << lastItem+4000 << endl;
    cout << "Continue with next number (Y/N)? ";
    cin >> cont;  cout << endl;

    char next[80];
    if (cont == 'Y'||'y')
    {
        int nextItem = lastItem+1+(4000);
        //cout << "nextItem: " << nextItem << endl;

        sprintf(next,"%d",nextItem);  // convert from int to char
        item[++lastItem].setNumber(next);

        // send to file number of next item
        fout  << item[lastItem].getNumber() << ":";
    }
    else
    {   // DONT USE THIS??????
        cout << "Enter number you would like for the next Item: ";
        cin >> number; cout << endl;

    }

    cout << "Enter Weight in DWT: ";
                                      
 cin >> weightDwt; cout << endl;
    item[lastItem].setDwt(weightDwt);
    fout << item[lastItem].getDwt() << ":";
    double dDwt = atof(weightDwt);  // double value of weightDwt char array

    double weightG = dDwt*1.55; // Gram conversion


    gcvt(weightG,6,weightGram);// ?????? Convert double to char


    item[lastItem].setGram(weightGram);
    fout << item[lastItem].getGram() << ":";

    cout << "Enter gold type (10/14/18/22/24): ";
    cin >> gold; cout << endl;
    item[lastItem].setGold(gold);
    fout << item[lastItem].getGold() << ":";

//HERE IS MY ISSUE (I HAVE TRIED THIS EXTERNAL FUNCTION< STILL NO GOOD)
    getSen();
/*
string test;
cout << "Enter a sentence: ";
getline(cin, test);
cout << "your entered: " << test << endl;
*/

    //item[lastItem].setDescription(description);
    fout << item[lastItem].getDescription() << ":";

    double bid;
    double pDwt;
    cout << "Enter Price per DWT so I can calculate bidding price: ";
    cin >> pDwt; cout << endl;

    bid = dDwt*pDwt;

    cout << "Calculated bid = " << bid << endl;
    double roundBid = ceil(bid)-.01;

    cout << "Rounded bid = " << roundBid << endl;

 gcvt(roundBid,8,price);// ?????? Convert double to char

    item[lastItem].setPrice(price);
    fout << item[lastItem].getPrice() << endl;

    fout.close();

deiussum · 07-04-2005, 04:46 PM

My guess is that your problem lies with using a cin >> something before doing the cin.getline. cin >> blah generally leaves the line feed in the buffer, so at the point that you use a cin.getline() it immediately reads that line feed and returns.

You could try using cin.getline() twice to clear the buffer, or use a cin.ignore(1); // Possibly need 2 for Windows as there is likely a carriage-return/linefeed combo of characters.

blizunt7 · 07-04-2005, 09:41 PM

wow that ignore worked, thanks!!!!

josh