argv - Read For Learn

Difference between char *argv[] and char **argv for the second argument to main()

CODE 1 CODE 2 CODE 1 and CODE 2 both give same output. but argument 2 of main function in CODE 1 and CODE 2 are different. Array of pointers are created above data section at compile time. argv is array of pointers. Then we should declare argument in main function as pointer to pointer … Read more

What’s wrong with my code? What is argv[1]?

I’m trying to ask the user to type in a string so I will print the length of the string. My code is built succeeded. However, when I entered a word and pressed ‘enter’, the program keeps running. I had to enter a second word, then the length of the first string displays. I’m confused … Read more

from sys import argv – what is the function of “script”

Generally, the first argument to a command-line executable is the script name, and the rest are the expected arguments. Here, argv is a list that is expected to contain two values: the script name and an argument. Using Python’s unpacking notation, you can write as while also throwing errors if there are an unexpected number of arguments … Read more

Is “argv[0] = name-of-executable” an accepted standard or just a common convention?

Guesswork (even educated guesswork) is fun but you really need to go to the standards documents to be sure. For example, ISO C11 states (my emphasis): If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment. … Read more

What does int argc, char *argv[] mean?

argv and argc are how command line arguments are passed to main() in C and C++. argc will be the number of strings pointed to by argv. This will (in practice) be 1 plus the number of arguments, as virtually all implementations will prepend the name of the program to the array. The variables are … Read more