Recently, I wrote the following, buggy, c code: #include <stdio.h> struct IpAddr { unsigned char a, b, c, d; }; struct IpAddr ipv4_from_str (const char * str) { struct IpAddr res = {0}; sscanf(str, "%d.%d.%d.%d", &res.a, &res.b, &res.c, &res.d); return res; } int main (int argc, char ** argv) { struct IpAddr ip = ipv4_from_str("192.168.1.1");… Read More What causes this bug to be non-deterministic
I have begun a project that makes heavy use of c++20 concepts as a way of learning some of the new c++20 features. As part of it, I have a function template that takes a single argument and operates on it. I wish to have the flexibility to pass types to this function that specify… Read More c++20 concepts: How can I use a type that may or may not exist?
I would like to pass a String variable from Shell Script to my python script and have it stored in sys.argv[1]. Currently this is my situation: main.sh TEST="This is a test" python main.py $TEST main.py if __name__ == ‘__main__’: print(sys.argv[1]) result: This How do I send $TEST so that sys.argv[1] = "This is a test"?… Read More How to pass a full String variable from shell script to python in one sys.argv
I have this code: typedef struct { int test; } SensorData_t; volatile SensorData_t sensorData[10]; SensorData_t getNextSensorData(int i) { SensorData_t data = sensorData[i]; return data; } int main(int argc, char** argv) { } It compiles with gcc version 8.3, but not with g++. Error message: main.c: In function ‘SensorData_t getNextSensorData(int)’: main.c:8:34: error: no matching function for… Read More indexing an element from a volatile struct doesn't work in C++
Running my script like the following: Node index.js POST * In my script I do this: process.argv.forEach((val, index) => { console.log(`${index}: ${val}`); }); The output will be the following where * causes to dump all my files’ names in my project: $ node index.js POST * 0: C:\Program Files\nodejs\node.exe 1: C:\Users\myComputer\myScript\index.js 2: POST 3: commands… Read More special characters like asterisks argv
I am relatively new to coding, especially in C. I am attempting to create a simple program designed to take a phrase, or list of strings, as command line arguments that populate char* argv[]. I then want to perform simple ASCII based changes to each character (such as making a => b, b => c,… Read More How can I populate a new array with strings passed as command line arguments in argv[]?