This Program Expects Two Command Line Arguments The First Is A String This program expects two command-line arguments: the first is a string, the second a number n. The program must determine and list all distinct substrings of length n that exist in the given string. In addition to listing the substrings, your program must also list the number of occurrences of each substring, both with and without overlap. If the number of command-line arguments is incorrect or if the second argument is not a positive integer greater than zero, an appropriate usage message must be printed to standard error and the program must terminate with exit status 1. Sample test cases include scenarios where the program outputs unique substrings of specified lengths along with their occurrence counts. The output should be consistent across different runs with the same input. Do not prompt for input; instead, process the given command line arguments directly.
Paper For Above instruction The task involves developing a C program that processes an input string with a specified substring length, n, which is provided as a command line argument. The primary goal is to identify and display all distinct substrings of length n within the input string and count their occurrences both allowing overlaps and without overlaps. This exercise emphasizes understanding string manipulation, substring extraction, and counting algorithms, as well as proper handling of command-line arguments and error messaging in C programming. To accomplish this, the program must first validate the input arguments. It should verify that exactly two arguments are provided: a string and an integer n greater than zero. If these conditions are not met, the program must output a usage message to standard error and terminate with a non-zero exit code. Validating that n is a positive integer ensures robustness against invalid inputs that could otherwise cause runtime errors or undefined behavior. Once the inputs are validated, the program should process the input string to extract all substrings of length n. It is important that the program captures only unique substrings, avoiding duplicates in the output. For each unique substring, it must calculate how many times it occurs in the original string, both in terms of overlapping occurrences and non-overlapping occurrences. Overlap counting involves sliding a window of length n through the string, counting every position where the substring appears. Non-overlapping counts involve moving the window past the last matched position to avoid counting overlapping instances.