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Tarali Dunn
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 Posted: Sat Sep 20, 2003 10:09 am Post subject: Problem with getline |
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In my code I write:
char test_file_name [20], shift_file_name[20], structure_file_name[20],
autocovariance_file_name[20], statistics_file_name[20];
int size_test_file, size_shift_file;
double test_resolution_x, test_resolution_y;
std::cout <<"Enter test file name n";
std::cin.getline(test_file_name, sizeof(test_file_name));
std::cout <<"Enter number of coordinates in test filen";
std::cin >> size_test_file;
std::cout <<"Enter shift file namen";
std::cin.getline(shift_file_name, sizeof(shift_file_name));
std::cout <<"Enter number of coordinates in shift filen";
std::cin >> size_shift_file;
std::cout <<"Enter output file name for structure data n";
std::cin.getline(structure_file_name, sizeof(structure_file_name));
std::cout <<"Enter output file name for autocovariance data n";
std::cin.getline(autocovariance_file_name,
sizeof(autocovariance_file_name));
When I go to run it. It waits for input after "Enter test file name" but
it seems to skip the other input statements and just does the output
statements. What am I doing wrong?
Tara
[email]taralid (AT) yahoo (DOT) com[/email]
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
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John Potter
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| Posted: Sat Sep 20, 2003 10:47 pm Post subject: Re: Problem with getline |
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On 20 Sep 2003 06:09:30 -0400, "Tarali Dunn" <mad (AT) seanet (DOT) com> wrote:
| Quote: | In my code I write:
char test_file_name [20], shift_file_name[20], structure_file_name[20],
autocovariance_file_name[20], statistics_file_name[20];
int size_test_file, size_shift_file;
double test_resolution_x, test_resolution_y;
std::cout <<"Enter test file name n";
std::cin.getline(test_file_name, sizeof(test_file_name));
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Reads the file name and removes the newline.
| Quote: | std::cout <<"Enter number of coordinates in test filen";
std::cin >> size_test_file;
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Reads the number and leaves the newline in the input.
| Quote: | std::cout <<"Enter shift file namen";
std::cin.getline(shift_file_name, sizeof(shift_file_name));
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Reads nothing and removes the newline.
| Quote: | std::cout <<"Enter number of coordinates in shift filen";
std::cin >> size_shift_file;
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Fails because the first character of the above file name is not
usable in an int.
Cin is now broken and all following reads fail.
Mixing >> and getline is always a pain.
(std::cin >> size_test_file).get();
Reads the number and removes the following character which we hope
is the newline. You might prefer something hopeless.
std::cin >> size_test_file;
cin.ignore(1000, 'n');
Reads the number and removes a bunch through the first newline.
John
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
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