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Popular Posts

error: variable-sized object may not be initialized

Have you ever come across this error?? "Understand the error thoroughly, so that it is not required to google in the future" - That's what I say to myself. #include <stdio.h> #include <string.h> int main () { int n = 15 ; char arr [ n ] = "Stunning Palace" ; printf ( "Arr [%s] and sizeof(arr) [%d] strlen(arr) [%d] \n " , arr , sizeof ( arr ), strlen ( arr )); return 0 ; } Output: 1 2 In function 'main': Line 7 : error: variable-sized object may not be initialized This error says, 1. Initialization has a problem. 2. Variable-length array has a problem. The reason for the above error is we initialized the variable-length array which is not recommended. char ARR_SIZE = 15; char arr[ARR_SIZE]; char arr[ARR_SIZE] = {}; //error char arr[ARR_SIZE] = {0}; //error An array size can't be assigned by another initializer (n = 15), but if the size

How to install "Libraries: SpeechRecognition, pyttsx3, & PyAudio of Python" ????

I will also demonstrate how to import modules pyttsx3, SpeechRecognition in this post along with PyAudio as mentioned in the title. Firstly, ensure that python is installed by running the below command from the cmd prompt. py -3 --version Installation of module pyttsx3 Go to MS Visual Studio Code and open the terminal(powershell) to install module pyttsx3. Later, I tried to install the package in another folder where I created a python project. Once installed, use the below command to verify if it is installed. pip list Installation of ipykernel While running the program, I also installed ipykernel as it was showing up some new error. A powerful interactive Python shell and a Jupyter kernel to work with Python code in Jupyter notebooks and other interactive frontends. Setting Up Environment variab

Mutex Vs Semaphore

Few terms to be learnt before jumping into Mutex & Semaphore. Read the posts about Preemptive and Non-preemptive Read the posts about Race Condition Synchronisation Synchronisation is defined as " Sharing the system resources by processes in such a way that, concurrent access to the shared data is handled thereby minimising the chance of inconsistent data ". So, I assume the synchronisation technique is for only global variables. Atomicity Atomic operations are those operations that finish their tasks as a whole i.e. no other interruption is allowed before its completion . An operation acting on a shared memory is atomic if it completes in a single step relative to other threads. When an atomic store is performed on a shared variable, no other thread can observe the modification half-complete. Critical Section It can be accessed via both process and thread. Concurrent access to the shared resource(variable) is protected, this protected section is cal

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