class A {
public:
int * mem;
A() : mem(NULL) {
}
~A() {
if (mem!=NULL)
delete mem;
}
}
Of course ,because destructor is called two times, I will get a seg fault.
How can i implement an operator overloading function inside class A to allocate memory before copy and avoid seg fault?
I hope you understand my question...
---------- Post updated at 11:37 AM ---------- Previous update was at 11:19 AM ----------
sorry. next time I will use code tags
Last edited by Scott; 12-18-2010 at 12:32 PM..
Reason: Use code tags, please...
When reading over some perl code in a software document, I came across an assignment statement like this
$PATH = ${PROJECT}/......./....
In this particular form of scalar variable assignment, what does the curly braces operators do ? Also, what is the benefit in doing scalar assignment this... (3 Replies)
Hi,
I have a piece of C++ code that can be compiled using g++, but reports an error when compiled with xlC:
xlC -DHAVE_CONFIG_H -I../SRC -I../include -DNoChange -DSPRNG_MPI -q64 -DLONG64=long -I/usr/lpp/ppe.poe/include -DLONG64=long -c -o libsprng_a-bignum.o bignum.cpp
"bignum.cpp",... (1 Reply)
Hi All,
In C++ one operator can be overloaded, but it can't be overloaded by it's own derieved class
Please let me know operator.
Thanks,
Naga:cool: (1 Reply)
Hi,
I have an requirement to overload the delete operator in C++, but it should also accept the sizeof() the object that is to be deleted. Actually I am trying to built a custom memory allocator and deallocator like a pool, which makes me to overload the delete operator.
Small example of the... (1 Reply)
Hi bros
I have a VPS 512mb (Burst 2GB) with Kloxo installed and hosting few sites on it with not much traffic
I am facing high cpu load for the last few days and seems mysqld is overloading the cpu
Any suggestion will be appreciated
Regards
Rizwan
Top output is as under
top -... (2 Replies)
Hi,
In the following code,
class A {
public:
void operator=(const A& rhs) {
if (this == &rhs) cout << "self-assigned";
}
};
class B {
A a; // should not be a pointer member, (i.e) A* a
};
int main() {
B b;
b = b; // Ans: self-assigned
}
I am really... (5 Replies)
Does anyone know how this line in bash works?
local gotbase= force= nicelevel corelimit
local pid base= user= nice= bg= pid_file=
local cgroup=
These lines are part of the daemon function inside the "functions" file at /etc/init.d in RH. (3 Replies)
I have a little code block (executing on AIX 7.1) that I cannot understand why the NOTFREE=0 does not appear to be assigned even though it goes through that block. This causes a unary operator issue.
#!/bin/bash
PLATFORM="AIX"
NEEDSPC=3000
set -x
if ; then
lsvg | grep -v rootvg | while... (6 Replies)
hi,
I defined my own String class and overloaded the output operator with
friend ostream& operator<<(ostream& os, const myString& str);
//overloads the << operator so it can be used to output values of type myString
which works fine. Until I try to execute the following statement:
// +... (6 Replies)
Discussion started by: milhan
6 Replies
LEARN ABOUT PHP
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS -raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO ppm(5)AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)
12-18-2010
