Sponsored Content
Top Forums Programming Help with C++ program execution. Post 302569774 by Corona688 on Tuesday 1st of November 2011 12:53:59 PM
Old 11-01-2011
Your program will recurse forever, consuming hypothetically infinite amounts of memory. "if(x==1.41421509)" will probably never return true, because floating point values don't have infinite precision. You should do
Code:
if(fabs(x-1.41421509) < .001)

instead, to see if it's approaching a value precise enough. Adjust ".001" to taste.

Since your computer probably won't let you have infinite amounts of stack space, recursing forever causes it to crash.

Why not use a loop instead of having calcx() call itself?

Code:
do
{
    // Calculate result
    // Set new ranges
    // Only if not precise enough, loop through again
} while(fabs(x-1.41421509) >= 0.001);

---------- Post updated at 10:53 AM ---------- Previous update was at 10:50 AM ----------

You should probably also have a count value, so if it gets stuck, it'll give up after a few thousand loops.
 

10 More Discussions You Might Find Interesting

1. Programming

execution small C++ program in UNIX

Hi my friends I am beginner unix programmer I have written small c++ program in text editor and I have change it mode to 555 to make it executable file to use it in unix O.P. #include<iostream.h> main() { cout<<"Hello World"; } but some syntax erroe came for << can any one help... (5 Replies)
Discussion started by: bintaleb
5 Replies

2. Linux

unix command for multifile program execution

how can I compile and execute multifile program in unix os.:o (0 Replies)
Discussion started by: alokmishra8
0 Replies

3. UNIX for Dummies Questions & Answers

multifile c program compilation and execution

i am using unix os and my program is divided in two text files .:):) how to compile and make one executable file, using unix command. (1 Reply)
Discussion started by: alokmishra8
1 Replies

4. Programming

A program to trace execution of another program

Hi, I wanted to know if i can write a program using switches and signals, etc to trace execution of other unix program which calls c program internally. If yes how? If not with signals and switches then are there any other methods apart from debugging with gdb/dbx. (3 Replies)
Discussion started by: jiten_hegde
3 Replies

5. Solaris

Program execution order like FIFO queue

Hi all: I have a problem with a C++ service runing on solaris 10. This service only set a signal on oracle table. When the service detect a cut off on the line (tcp/ip), trigger a cobol program for set the signal OFF. When the line is on again, the service trigger the same cobol program for set... (0 Replies)
Discussion started by: hcastellani
0 Replies

6. Programming

Debugging Program during execution

I have made use of 'valgrind' and -finstrument-functions compiler option for debugging / analyzing code. Both the options lets us know the line / file being executed to some extent. Is there a generic way that lets program dump the file:line it is getting executed dumped to a log file during... (3 Replies)
Discussion started by: uunniixx
3 Replies

7. Shell Programming and Scripting

Execution problem with repeat the same program with two set of same data

I got a program named as "fastq_to_fasta". I got a long list of file all named as AB1 and AB2. My input file is : 071022_L1_AB1.fq 012121_L1_AB1.fq 021213_L1_AB1.fq 012153_L1_AB1.fq 071022_L1_AB2.fq 012121_L1_AB2.fq 021213_L1_AB2.fq 012153_L1_AB2.fq . . . . . . My desired... (10 Replies)
Discussion started by: patrick87
10 Replies

8. Programming

popen hangs program during cmd execution

How can I get around this? when my program reaches the following popen job it halts the program until the ping/netstat/ipconfig/traceroute is completed then resume to the rest of the program... FILE *in; extern FILE *popen(); char buff; char newline; char nstat; char nping; ... (5 Replies)
Discussion started by: Jess83
5 Replies

9. Shell Programming and Scripting

Automating execution of commands inside a program

I have a program dnapars I execute the program from command line as following: ./dnapars The program then prompts me some message as a user menu from where I have to select a series of options in the order R U Y R. And then I copy the output file (outfile) in another result file. I wrote the... (3 Replies)
Discussion started by: deeptisjains
3 Replies

10. Shell Programming and Scripting

Execution of compressed program

I need UNIX scripts for polling, Uncompressing files and moving files between directory. Also trying to save file paths and any other variables in an independent file (.env) and use these at runtime by executing this file in the main script. (3 Replies)
Discussion started by: new2script
3 Replies
FBB::lm(3bobcat)                                              OFoldStream manipulator                                             FBB::lm(3bobcat)

NAME
FBB::lm - Manipulator setting left margins of OFoldStream objects SYNOPSIS
#include <bobcat/ofoldstream> or #include <bobcat/ofoldstreambuf> Linking option: -lbobcat DESCRIPTION
The lm class implements a manipulator that can be inserted into OFoldStream objects to set the stream's left margin to a requested value. Depending on the tab-setting of the OFoldStream the inserted value represents the number of blank space characters or the number of tab-characters that will be used for the left margin. The request will be processed at the next newline character or std::flush or std::endl manipulator that is inserted into the stream. If a line is still once an lm object and a flush manipulator are inserted into the stream then the new left margin will be effective at the next word inserted into that line (cf., the example section below). A bad_cast exception is thrown when the manipulator is inserted into an ostream that is not using a OFoldStreambuf buffer. NAMESPACE
FBB All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB. INHERITS FROM
- CONSTRUCTOR
o lm(size_t newValue): The standard copy constructor is available. MEMBER FUNCTIONS
There are no public or protected member functions in this class. EXAMPLE
#include <iostream> #include <bobcat/ofoldstream> using namespace std; using namespace FBB; int main() { OFoldStream out(cout, 0, 80); out << "hello world (left margin is 0)" << lm(4) << " " "this uses a 4 character wide left margin " << lm(0) << flush << "at column 0 again "; return 0; } FILES
bobcat/lm - defines the class interface SEE ALSO
bobcat(7), manipulators(3bobcat), mlm(3bobcat), ofoldstream(3bobcat) BUGS
None Reported. DISTRIBUTION FILES
o bobcat_3.01.00-x.dsc: detached signature; o bobcat_3.01.00-x.tar.gz: source archive; o bobcat_3.01.00-x_i386.changes: change log; o libbobcat1_3.01.00-x_*.deb: debian package holding the libraries; o libbobcat1-dev_3.01.00-x_*.deb: debian package holding the libraries, headers and manual pages; o http://sourceforge.net/projects/bobcat: public archive location; BOBCAT
Bobcat is an acronym of `Brokken's Own Base Classes And Templates'. COPYRIGHT
This is free software, distributed under the terms of the GNU General Public License (GPL). AUTHOR
Frank B. Brokken (f.b.brokken@rug.nl). libbobcat1-dev_3.01.00-x.tar.gz 2005-2012 FBB::lm(3bobcat)
All times are GMT -4. The time now is 03:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy