Hi,
I'm trying to input entire lines of text from an open file to the screen. So far, I've only been able to print one word at a time followed by an unwanted newline. What's the secret? And, what recommendations can you give for a text that goes beyond the beginner material?
Here are some snips:
ifstream fin("dbase_a.txt", ios::in);
while (fin >> line))
{
outputLine(line);
}
void outputLine(const string line)
{
cout << line << endl;
}
Thanks,
David Korb
Allow me to follow this up by saying "Oops!". Okay, so my unwanted newline was right there in my code, but how do I reproduce the newline that is inherent in the file itself? It all runs together at this point:
Smith,John:1208:Jan.31,1998Decker,Jane:8012ec.01,1997Mo,Joe:1028:Jan.12,198Rock,Dan:2081:June 01,1998Cahn,Debbie:2801:July16,1997Dusty,Tom:3012: July19,1998Harvey,Sheila:3141:Aug.021998Press any key to continue . . .
This database was just something to work with. The file I really want to print out is going to be a normal text document.
You can use getline with an appropriate delimeter. The default is '\n' so it should work with what you need. The reason it doesn't work with operator>> of ifstream is that operator>> uses whitespace as a delimeter so you only get one word at a time.Hope this helps.Code:#include <fstream> #include <iostream> #include <string> using namespace std; int main() { // ios::in is the default, so no need to specify it ifstream f("dbase_a.txt"); string line; // getline eats the delimeter ('\n' by default) but doesn't // store it, so you'll have to consider that when using it. while(getline(f, line)) { cout << line << endl; } }
- lmov
Very nice use of comments and instruction, IMOV.
We need more people like you.
Blue
Or you may use the get() function in the following way:
void main()
{
ifstream fin("dbase_a.txt");
char line; //change line to char type
while (fin.get(line)) //use get() function
{
outputLine(line);
}
}
void outputLine(const char line)
{
cout << line; //drop the endl escape-sequence
}
