Feof() end-of-file indicator function in C – Example
The function feof() tests the end-of-file indicator for the stream pointed to by stream, returning nonzero if … Read more
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Programming Languages
C program to read file contents and count bytes using feof API
The function feof() tests the end-of-file indicator for the stream pointed to by stream, returning nonzero if … Read more
Convert Byte Array to Hex using Java
The post briefs above how you can convert byte Array to Hex values and print those on … Read more
Install Java using apt-get command on Ubuntu
Installing JAVA on ubuntu can be done using following easiest command. for Ubuntu 20.04, this command installs … Read more
C code for safe read and write from a file
Below functions make sure we are safely and completely reading and writing from a file pointer fd, … Read more
C program in Linux to find the current working directory (PWD)
getcwd, getwd, get_current_dir_name functions return a null-terminated string containing an absolute pathname that is the current working … Read more
C program to convert integer number to string
Following program converts integer number 42 to string “42” using sprintf. sprintf() writes to the character string. … Read more
Write Comments in C Program
In C program, comments doesn’t have any use other than for better understanding of the developers of … Read more
Sending ARP request and receiving ARP Reply using C code
This post is in continuation of our previous post “Understanding ARP (Address Resolution Protocol) basics“ To visualise … Read more
Bitbake / Yocto recipes for cross compiling golang program
For compiling simple golang helloworld program as part of yocto build framework, we need to download meta-golang … Read more
C program to know storage size of int, char and float
To get the exact size of a type or a variable on a particular platform, you can … Read more
Fix “Invalid Operands to Binary %” in C
This compiler error means `%` received a floating-point operand. Fix the underlying type choice with integer arithmetic or the appropriate `fmod` function—not a reflexive cast.
C Modulo Operator: Check Divisibility and Remainders
A practical look at C’s % operator: when a zero remainder proves divisibility, what negative results mean, and which edge cases need a guard.
Floating-Point Remainder in C: Why Modulo % Fails and How to Use fmod()
Calculate floating-point division remainders in C using fmod(), fmodf(), and fmodl() from math.h. Learn why % operator fails with float and double types.
Querying Network Interface Details by Name in Go (net.InterfaceByName)
Write a Go program using net.InterfaceByName to lookup IP addresses, MAC hardware addresses, MTU, and status flags for a specific network interface.
Inspecting Linux Network Interfaces, MACs, and IP Addresses in Go
Learn how to enumerate network interfaces, inspect MAC addresses, extract IPv4/IPv6 CIDR subnets, and check interface status flags using Go.
Merging PHP Arrays and Deduplicating Unique Elements
Merge two or more PHP arrays and filter unique elements using array_merge(), array_unique(), modern spread unpack operators, and array union operators.
Use slices ( like dynamic array ) in go language
An array has a fixed size. A slice, on the other hand, is a dynamically-sized, flexible view … Read more
C program to print files in current directory in reverse order
The scandir() function scans the directory dirp, calling filter() on each directory entry. Entries for which filter() … Read more
Understanding execution and debugging of C program using ltrace
As we seen in previous post “Understanding Very Minimal C Program and its execution in Ubuntu Linux” … Read more
Understanding Linux Signals with simple C program
Signals are a limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant … Read more
Identify / Test file types in Linux using C program stat API
The file mode, stored in the st_mode field of the file attributes, contains two kinds of information: … Read more
Monitoring Linux File System Events in C with inotify System Calls
Write a C program in Linux using inotify_init and inotify_add_watch to monitor directory file creation, modification, and deletion events in real time.
Converting Windows BMP Images to Raw 16-Bit RGB565 Binary for Embedded Displays
Write a C program in Linux to parse Windows BMP image headers, convert 24-bit BGR pixels into raw 16-bit RGB565 binary data for embedded LCD displays.