What do `argc` and `argv` mean in a Qt application?
I'm learning C++ with the Qt framework and noticed that `QApplication` is commonly created with `int argc` and `char *argv[]`. What do these parameters represent, and why does…
command line arguments
What do `argc` and `argv` mean in a Qt application?
I'm learning C++ with Qt and noticed that QApplication is commonly created with `QApplication app(argc, argv);`. What do `int argc` and `char *argv[]` represent, and why does Qt…
What are getopt and getopts used for in Bash scripts?
I'm reading the documentation for getopt, but I still don't understand what problem it solves or when I should use it. Could someone explain its purpose with a…
What are getopt and getopts used for in Bash scripts?
I'm reading the Bash documentation for getopt and getopts, but I still don't understand their purpose. What problem do they solve, and when would I use them instead…
Does the order of command-line options matter in Bash scripts?
I'm writing Bash wrapper functions that validate inputs, check whether a command is available, and then run programs such as pg_restore. To avoid a long list of parameters,…
Why does C provide both argc and argv for command-line arguments?
I'm learning how command-line arguments work in C. My program is: #include int main(int argc, char *argv[]) { printf("argc: %dn", argc); } After compiling it with `gcc main.c…
Why does steamosctl work in a terminal but fail from a Bash script?
I'm new to Bash scripting on Linux. Running `steamosctl get-default-desktop-session` directly in a terminal works, but running the same command from a script produces a "No such file…
What do argc and argv mean in a C main function?
I'm learning C and came across this program structure: int main(int argc, char *argv[]) { char *pass; pass = getpass("Enter a password: "); printf("Password: %sn", pass); int strength…