Pipe in a string to a program with special characters

[L4nce0]

Hi
I need some help >< I finally figured out how to read in a pipeline from say echo. However I toss in a few newlines and it does to garbage!

string in;
if(cin)
cin >> in;

give it say echo "foo" | a.out
we are good
Now give it
echo -e "fo\no" | a.out
I get just -e

I tried to fix it

while(cin){
cin >> temp;
userin+=temp;

}

and now I get
echo -e "ab\ncd" | a.out
-eabcdcd. Was read

[sohguanh]

Can you post the whole code snippet ? I believe \n is interpreted as the line terminator and cin will stop after that and that is why you see garbage.

If you want \n to be a valid input data, then you may want to set your delimiter to other characters besides \n.

[L4nce0]

hah yeah that really was the contents but here you go =)
It's just a test method whire I figure it out for my real program. I can't post the contents of that application.

#include <string>
#include <iostream>
#include <vector>
#include <unistd.h>
#include<fstream>
using namespace std;

int main(int argc, char **argv) {
string userin;
string temp;
while(cin){
cin >> temp;
userin+=temp;

}
cout << userin << ". Was read"<<endl;

}

before it was

#include <string>
#include <iostream>
#include <vector>
#include <unistd.h>
#include<fstream>
using namespace std;

int main(int argc, char **argv) {
string userin;
string temp;
if(cin){
cin >> temp;
userin+=temp;

}
cout << userin << ". Was read"<<endl;

}

Also I noted that it waits till something is read... that really isn't what I want it to do...

Essentially I either need to provide a fline to be read, pipe a string in or command line a string in. Only one of 3 (I guess I can do a if(argc==1) then try to pipe it...)

really it should be going with the echo -e to handle the new lines. the -e option says to process it. Instead it's doing this odd stuff...

[sohguanh]

Seem the other topic on feof is haunting us again. For your observation change to below code.

while(cin >> temp){
//cin >> temp;
userin+=temp;
}

And he should work as expected even when you echo -e "ab\ncd" | a.out