Hello all
I started computer science and C++ programming only 6 weeks ago with no prior knowledge. It's a great language, the only other one apart from English that I hope to speak fluently quite soon. I look forward to participating further on these forums, seeking answers and looking at previous threads. Hopefully I will be able to help others later on. Let me cut to the chase.
1. The problem statement, all variables and given/known data:
Although this is an assignment question, it isn't due for a while, and I'm mainly only awake at 4:20am for the sake of it. The question asks to write a C++ program that converts a 4-digit octal number to decimal. I wrote and compiled it, but there's something wrong. I don't think it's arithmetic, because the program terminates at return 1, even if there isn't an 8 or a 9.
2. Relevant commands, code, scripts, algorithms: 3. The attempts at a solution (include all code and scripts):
As you can see in the code, i checked the output of each digit. It returned a dud result.
Tried removing the if statement testing for 8s and 9s. Returned a large negative number.
Also tried other fine-tuning methods to no avail.
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
University of Wollongong, Wollongong, Australia, Daniel Saffioti, CSCI114
Hello everybody,
I would like to understand why the printf function is returning me an octal value with this command :
printf %4.4d 0010 returns 0008
printf %4.4d 10 returns 0010
Thanks for help. (3 Replies)
Anybody please help me...
Design an algorithm that accepts an input a decimal number and converts it into BCD (Binary Coded Decimal) representation. Also, draw its Flow Chart.
This is a unix qn...
plz post algorithm for that :confused: (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Design an algorithm that accepts an input a decimal number and converts it into BCD (Binary... (2 Replies)
I'm relatively new to both UNIX and Linux and slightly less new at programming. But I can't figure out why this won't run properly.
It's meant to calculate the GCD of two numbers (simple enough, you'd think). And I designed it myself and it looks good to me and my instructor won't respond. If... (1 Reply)
The file contains code like the below and need to convert each one into a decimal
00 00 00 04 17 03 06 01
So the output should come as
0 0 0 4 23 3 6 1 (24 Replies)
I have a below snippet of code from my perl script and its causing a problem when the output of $lTAX is 0 (zero) its getting displayed as -0.00. I want output to be 0 not -0.00. Any help would be appreciated.
#!/usr/bin/perl
my $lTotA = 50.94;
my $lVatA = 8.49;
my $lAllocD;
my $lAdjNr =... (4 Replies)
Hi,
I have a file tp.txt having below data
CE2DD,N,5055,16.12.2013,3.114,12195.89,MVR,003388,Web::00000005055,Web Payment
and i am using below code to print the values
for var_amt_pay in `awk -F',' '{ arr += $6} END {for (i in arr) {print i "," arr } }' tp.txt`
do
... (2 Replies)
Hi ,
seq can be 0...128
int windex = seq / 8;
int bindex = seq % 8;
unsigned char bitvalue = '\x01' << (7-bindex) ;
bpv.bitmapvalue = bitvalue;
This is the part of a program to convert decimal to bitmap value of hexadecimal.
I want this to change to convert only to... (1 Reply)
Here are a few lines from my script. The problem I am having is that the statement for gstat returns this error:
line 43:
The statement is coming from gstat.
Is there a way to fix it? Apparently -eq 02 is coming up as some octal value, I need it to be recognized as 02.
Apparently in... (4 Replies)
Discussion started by: newbie2010
4 Replies
LEARN ABOUT V7
sprof
SPROF(1) Linux User Manual SPROF(1)NAME
sprof - read and display shared object profiling data
SYNOPSIS
sprof [option]... shared-object-path [profile-data-path]
DESCRIPTION
The sprof command displays a profiling summary for the shared object (shared library) specified as its first command-line argument. The
profiling summary is created using previously generated profiling data in the (optional) second command-line argument. If the profiling
data pathname is omitted, then sprof will attempt to deduce it using the soname of the shared object, looking for a file with the name
<soname>.profile in the current directory.
OPTIONS
The following command-line options specify the profile output to be produced:
-c, --call-pairs
Print a list of pairs of call paths for the interfaces exported by the shared object, along with the number of times each path is
used.
-p, --flat-profile
Generate a flat profile of all of the functions in the monitored object, with counts and ticks.
-q, --graph
Generate a call graph.
If none of the above options is specified, then the default behavior is to display a flat profile and a call graph.
The following additional command-line options are available:
-?, --help
Display a summary of command-line options and arguments and exit.
--usage
Display a short usage message and exit.
-V, --version
Display the program version and exit.
CONFORMING TO
The sprof command is a GNU extension, not present in POSIX.1.
EXAMPLE
The following example demonstrates the use of sprof. The example consists of a main program that calls two functions in a shared object.
First, the code of the main program:
$ cat prog.c
#include <stdlib.h>
void x1(void);
void x2(void);
int
main(int argc, char *argv[])
{
x1();
x2();
exit(EXIT_SUCCESS);
}
The functions x1() and x2() are defined in the following source file that is used to construct the shared object:
$ cat libdemo.c
#include <unistd.h>
void
consumeCpu1(int lim)
{
int j;
for (j = 0; j < lim; j++)
getppid();
}
void
x1(void) {
int j;
for (j = 0; j < 100; j++)
consumeCpu1(200000);
}
void
consumeCpu2(int lim)
{
int j;
for (j = 0; j < lim; j++)
getppid();
}
void
x2(void)
{
int j;
for (j = 0; j < 1000; j++)
consumeCpu2(10000);
}
Now we construct the shared object with the real name libdemo.so.1.0.1, and the soname libdemo.so.1:
$ cc -g -fPIC -shared -Wl,-soname,libdemo.so.1
-o libdemo.so.1.0.1 libdemo.c
Then we construct symbolic links for the library soname and the library linker name:
$ ln -sf libdemo.so.1.0.1 libdemo.so.1
$ ln -sf libdemo.so.1 libdemo.so
Next, we compile the main program, linking it against the shared object, and then list the dynamic dependencies of the program:
$ cc -g -o prog prog.c -L. -ldemo
$ ldd prog
linux-vdso.so.1 => (0x00007fff86d66000)
libdemo.so.1 => not found
libc.so.6 => /lib64/libc.so.6(0x00007fd4dc138000)
/lib64/ld-linux-x86-64.so.2(0x00007fd4dc51f000)
In order to get profiling information for the shared object, we define the environment variable LD_PROFILE with the soname of the library:
$ export LD_PROFILE=libdemo.so.1
We then define the environment variable LD_PROFILE_OUTPUT with the pathname of the directory where profile output should be written, and
create that directory if it does not exist already:
$ export LD_PROFILE_OUTPUT=$(pwd)/prof_data
$ mkdir -p $LD_PROFILE_OUTPUT
LD_PROFILE causes profiling output to be appended to the output file if it already exists, so we ensure that there is no preexisting pro-
filing data:
$ rm -f $LD_PROFILE_OUTPUT/$LD_PROFILE.profile
We then run the program to produce the profiling output, which is written to a file in the directory specified in LD_PROFILE_OUTPUT:
$ LD_LIBRARY_PATH=. ./prog
$ ls prof_data
libdemo.so.1.profile
We then use the sprof -p option to generate a flat profile with counts and ticks:
$ sprof -p libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls us/call us/call name
60.00 0.06 0.06 100 600.00 consumeCpu1
40.00 0.10 0.04 1000 40.00 consumeCpu2
0.00 0.10 0.00 1 0.00 x1
0.00 0.10 0.00 1 0.00 x2
The sprof -q option generates a call graph:
$ sprof -q libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile
index % time self children called name
0.00 0.00 100/100 x1 [1]
[0] 100.0 0.00 0.00 100 consumeCpu1 [0]
-----------------------------------------------
0.00 0.00 1/1 <UNKNOWN>
[1] 0.0 0.00 0.00 1 x1 [1]
0.00 0.00 100/100 consumeCpu1 [0]
-----------------------------------------------
0.00 0.00 1000/1000 x2 [3]
[2] 0.0 0.00 0.00 1000 consumeCpu2 [2]
-----------------------------------------------
0.00 0.00 1/1 <UNKNOWN>
[3] 0.0 0.00 0.00 1 x2 [3]
0.00 0.00 1000/1000 consumeCpu2 [2]
-----------------------------------------------
Above and below, the "<UNKNOWN>" strings represent identifiers that are outside of the profiled object (in this example, these are
instances of main()).
The sprof -c option generates a list of call pairs and the number of their occurrences:
$ sprof -c libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile
<UNKNOWN> x1 1
x1 consumeCpu1 100
<UNKNOWN> x2 1
x2 consumeCpu2 1000
SEE ALSO gprof(1), ldd(1), ld.so(8)COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 SPROF(1)