Comments on: 13.1 — Input and output (I/O) streams

By: Nick Xu

Nick Xu — Sat, 21 May 2011 04:15:11 +0000

//run correctly
#include
using namespace std;
int main()
{
int a,b,c;
do{
printf(“a,b,c:\n”);
scanf(“%d,%d,%d”,&a,&b,&c);
}while(!(a+b>c && a+c>b && c+b>a));
printf(“Correct!A valid traingle.\n”);
return 0;
}

By: Nick Xu

Nick Xu — Sat, 21 May 2011 04:12:24 +0000

OK,do it like this:

//C style without C++ class,under VC++6.0
#include
using namespace std;
int main()
{
int a,b,c;
do{
printf(“a,b,c:\n”);
scanf(“%d,%d,%d”,&a,&b,&c);
}while(!(a+b>c && a+c>b && c+b>a));
printf(“Correct!A valid traingle.\n”);
return 0;
}

By: sloooh

sloooh — Wed, 11 May 2011 16:06:31 +0000

Input three positive integers representing the sides of a traingle and determine whether they form a valid traingle. Hint:n a traingle the sum of any two sides must always be greater than the side.

how i can make programme for this by c++ way???

By: sloooh

sloooh — Wed, 11 May 2011 16:01:05 +0000

i have qustion , any one can help me???

By: saini

saini — Tue, 31 Aug 2010 05:02:26 +0000

 what are buffered and unbuffered errors ?

By: Alex

Alex — Sun, 03 May 2009 15:13:28 +0000

In your second line in after Streams, you have “it’s”

everyone knows possessive pronouns cannot have an apostrophe!

By: Alex

Alex — Sat, 02 May 2009 04:01:33 +0000

There’s actually very little difference between them. However, it is possible to redirect one or more of the channels to file (or printer, or network, or elsewhere). That way, you can have normal output go to one place (eg. a file) and have any errors go to another place (eg. the screen).

By: Abhisek

Abhisek — Sat, 21 Mar 2009 19:31:04 +0000

Q: What is the difference between the outputs of “cout”, “cerr” & “clog” ?
NOTE: Both of them gives exactly the same output to the screen.
Q: Does “cerr” has any more inner workings than printing “Oops, you entered an invalid age!” to the screen?

cout << "Oops, you entered an invalid age!" << endl;

and

cerr << "Oops, you entered an invalid age!" << endl;

By: Kavitha

Kavitha — Thu, 22 Jan 2009 15:39:51 +0000

cout — an ostream_withassign class tied to the standard input

should read as

cout — an ostream_withassign object tied to the standard output

[ You are correct. Thanks for pointing out the mistake. -Alex ]

By: rohan

rohan — Tue, 16 Sep 2008 13:15:18 +0000

Abstractly, a stream can …. infinite length that “us” used as a buffer
===>
Abstractly, a stream can …. infinite length that “is” used as a buffer

[ Fixed. Thanks! -Alex]