The document discusses files and streams in C++. It defines files as sequences of bytes that end with an end-of-file marker. Streams are used to connect programs to files for input and output. There are standard input and output streams (cin and cout) as well as file streams that use classes like ifstream for input and ofstream for output. Files can be accessed sequentially or randomly - sequential files are read from start to finish while random access files allow direct access to any record.
File Handling is used in C language for store a data permanently in computer.
Using file handling you can store your data in Hard disk.
http://www.tutorial4us.com/cprogramming/c-file-handling
File Handling is used in C language for store a data permanently in computer.
Using file handling you can store your data in Hard disk.
http://www.tutorial4us.com/cprogramming/c-file-handling
This is ppt prsented by me in class in this ppt i include file handling in which i tell us about the types of files
creation of text file in C ++ ,updating a text file in C++ , printing the inforamtion in text file .creation of binary file in C ++ ,updating a binary file in C++ , printing the inforamtion in binary file, text file function and binary file function in c++ , File ponters ,syntax of every thing and use of file pointers and many more.
System calls operating system ppt by rohit malavRohit malav
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System call
a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on. This may include hardware-related services, creation and execution of new processes, and communication with integral kernel services such as process scheduling.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
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A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
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Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview​
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
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Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
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The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
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Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
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As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
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The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
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Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
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Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Key Trends Shaping the Future of Infrastructure.pdf
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17 files and streams
1. Files and Streams
09/04/131 VIT - SCSE
By
G.SasiKumar., M.E., (Ph.D).,
Assistant Professor
School of Computing Science and Engineering
VIT University
2. 09/04/132 VIT - SCSE
Files
Diskette
Memory
Input file
Output file
Used to transfer data to and from disk
3. 09/04/133 VIT - SCSE
Streams
ď‚—Stream
ď‚—a channel or medium where data are passed to receivers from
senders.
ď‚—Output Stream
ď‚—a channel where data are sent out to a receiver
ď‚—cout; the standard output stream (to monitor)
ď‚—the monitor is a destination device
ď‚—Input Stream
ď‚—a channel where data are received from a sender
ď‚—cin; the standard input stream (from the keyboard)
ď‚—the keyboard is a source device
4. 09/04/134 VIT - SCSE
Standard Input / Output Streams
ď‚—Standard Streams use #include <iostream.h>
ď‚—Standard Input Stream
ď‚—cin names the stream
ď‚—the extractor operator >> extracts, gets, or receives the next element from the
stream
ď‚—Standard Output Stream
ď‚—cout names the stream
ď‚—the inserter operator << inserts, puts, or sends the next element to the stream
ď‚—Opening & closing of the standard streams occur automatically when
the program begins & ends.
5. 09/04/135 VIT - SCSE
File Streams
ď‚—Files
ď‚—data structures that are stored separately from the program (using
auxiliary memory)
ď‚—streams must be connected to these files
ď‚—Input File Stream
ď‚—extracts, receives, or gets data from the file
ď‚—Output File Stream
ď‚—inserts, sends, or puts data to the file
ď‚—#include <fstream.h> creates two new classes
ď‚—ofstream (output file stream)
ď‚—ifstream (input file stream)
6. 09/04/136 VIT - SCSE
C++ Files and Streams
ď‚—C++ views each files as a sequence of bytes.
ď‚—Each file ends with an end-of-file marker.
ď‚—When a file is opened, an object is created and a stream is
associated with the object.
ď‚—To perform file processing in C++, the header files
<iostream.h> and <fstream.h> must be included.
ď‚—<fstream.> includes <ifstream> and <ofstream>
10. 09/04/1310 VIT - SCSE
Opening Files
ď‚—Use open function or include file name when declaring
variable:
ď‚—ifstream inobj1;
inobj1.open(“in1.dat”)
ifstream inobj2(“in2.dat”);
ď‚—To check if file successfully opened check object in
condition:
ď‚—if (!inobj1)
 cout << “Unable to open file in1.dat” << endl;
11. 09/04/1311 VIT - SCSE
Opening Output Files
Ofstream outClientFile(“clients.dat”, ios:out)
OR
Ofstream outClientFile;
outClientFile.open(“clients.dat”, ios:out)
Example
ofstream out(“outf”,ios::out | ios::append);
// out is an append connection to outf
12. 09/04/1312 VIT - SCSE
File Open Modes
ios:: app - (append) write all output to the end of file
ios:: ate - data can be written anywhere in the file
ios:: binary - read/write data in binary format
ios:: in - (input) open a file for input
ios::out - (output) open a file for output
ios: trunc -(truncate) discard the files’ contents if
it exists
ios:nocreate - if the file does NOT exists, the open operation fails
ios:noreplace - if the file exists, the open operation fails
13. 09/04/1313 VIT - SCSE
Closing a File
ď‚—Use close() on object to close connection to file:
ifstream in(“in.dat”);
…
ď‚—in.close();
14. 09/04/1314 VIT - SCSE
#include <stdlib.h>
#include <iostream.h>
#include <fstream.h>
void main() {
char infname[101];
char outfname[101];
char buffer[101];
cout << ”File to copy from: ";
cin >> infname;
ifstream in(infname);
if (!in) {
cout << "Unable to open " << infname
<< endl;
exit(0);
}
cout << "File to copy to: ";
cin >> outfname;
ofstream out(outfname,ios::out |
ios::noreplace);
if (!out) {
cout << "Unable to open " <<
outfname << " -- already exists!" <<
endl;
exit(0);
}
in.getline(buffer,100);
while (!in.eof()) {
out << buffer << endl;
in.getline(buffer,100);
}
in.close();
out.close();
}
15. Using Sequential Access Files
ď‚—A sequential access file is often called a text file
ď‚— Bit - smallest data item
ď‚—value of 0 or 1
 Byte – 8 bits
ď‚— used to store a character
ď‚— Decimal digits, letters, and special symbols
ď‚— Field - group of characters conveying meaning
ď‚—Example: your name
 Record – group of related fields
ď‚—Represented a struct or a class
ď‚—Example: In a payroll system, a record for a particular employee that
contained his/her identification number, name, address, etc.
 File – group of related records
ď‚—Example: payroll file
 Database – group of related files
09/04/1315 VIT - SCSE
16. 09/04/1316 VIT - SCSE
The Data Hierarchy
ď‚—Record key
ď‚—identifies a record to facilitate the retrieval of specific records from a file
ď‚—Sequential file
ď‚— records typically sorted by key
1
01001010
Judy
Judy Green
Sally Black
Tom Blue
Judy Green
Iris Orange
Randy Red
File
Record
Field
Byte (ASCII character J)
Bit
17. 09/04/1317 VIT - SCSE
Files and Streams
ď‚—C++ views each file as a sequence of bytes
ď‚—File ends with the end-of-file marker
ď‚—Stream created when a file is opened
ď‚—File processing
ď‚—Headers <iostream.h> (cout, cin, cerr, clog)
ď‚—and <fstream.h>
ď‚—class ifstream - input
ď‚—class ofstream - output
ď‚—class fstream - either input or output
18. 09/04/1318
VIT - SCSE
Creating a Sequential Access
File
ď‚—Files are opened by creating objects of stream classes
ifstream, ofstream or fstream
ď‚—File stream member functions for object file:
file.open(“Filename”, fileOpenMode);
ď‚—file.close();
ď‚—destructor automatically closes file if not explicitly closed
ď‚—File open modes:
Mode Description
ios::app Write all output to the end of the file.
ios::ate Open a file for output and move to the end of the
file (normally used to append data to a file).
Data can be written anywhere in the file.
ios::in Open a file for input.
ios::out Open a file for output.
ios::trunc Discard the file’s contents if it exists (this is
also the default action for ios::out)
ios::binary Open a file for binary (i.e., non-text) input or
output.
Makes a "line of
communication"
with the object and
the file.
19. 09/04/1319 VIT - SCSE
File position pointer
<istream> and <ostream> classes provide member functions for
repositioning the file pointer (the byte number of the next byte
in the file to be read or to be written.)
These member functions are:
seekg (seek get) for istream class
seekp (seek put) for ostream class
20. 09/04/1320
VIT - SCSE
Examples of moving a file
pointer
inClientFile.seekg(0) - repositions the file get pointer to the beginning
of the file
inClientFile.seekg(n, ios:beg) - repositions the file get pointer to the
n-th byte of the file
inClientFile.seekg(m, ios:end) -repositions the file get pointer to the
m-th byte from the end of file
nClientFile.seekg(0, ios:end) - repositions the file get pointer to the
end of the file
The same operations can be performed with <ostream>
function member seekp.
21. 09/04/1321
VIT - SCSE
Member functions tellg() and
tellp().
Member functions tellg and tellp are provided to return the
current locations of the get and put pointers, respectively.
long location = inClientFile.tellg();
To move the pointer relative to the current location use ios:cur
inClientFile.seekg(n, ios:cur) - moves the file get pointer n bytes
forward.
22. 09/04/1322
VIT - SCSE
Updating a sequential file
Data that is formatted and written to a sequential file cannot
be modified easily without the risk of destroying other data
in the file.
If we want to modify a record of data, the new data may be
longer than the old one and it could overwrite parts of the
record following it.
23. Problems with sequential files
Sequential files are inappropriate for so-called “instant access”
applications in which a particular record of information must
be located immediately.
These applications include banking systems, point-of-sale
systems, airline reservation systems, (or any data-base
system.)
09/04/1323
VIT - SCSE
24. Random access files
Instant access is possible with random access files.
Individual records of a random access file can be accessed
directly (and quickly) without searching many other
records.
09/04/1324
VIT - SCSE
25. Creating a Random Access
Fileď‚—write - outputs a fixed number of bytes beginning at a
specific location in memory to the specified stream
ď‚—When writing an integer number to a file,
ď‚—outFile.write( reinterpret_cast<const char *>( &number ),
sizeof( number ) );
ď‚—First argument: pointer of type const char * (location to
write from)
ď‚—address of number cast into a pointer
ď‚—Second argument: number of bytes to write(sizeof(number))
ď‚—recall that data is represented internally in binary (thus, integers can be
stored in 4 bytes)
ď‚—Do not use
ď‚—outFile << number;
ď‚—could print 1 to 11 digits, each digit taking up a byte of storage
09/04/1325
VIT - SCSE
27. Writing Data Randomly to a
Random Access File
ď‚—seekp can be used in combination with write to store data
at exact locations in an output file
09/04/1327
VIT - SCSE
29. The <istream> function read
inCredit.read (reinterpret_cast<char *>(&client),
sizeof(clientData));
The <istream> function inputs a specified (by
sizeof(clientData)) number of bytes from the current
position of the specified stream into an object.
09/04/1329
VIT - SCSE