HELP IN C PROGRAM CODE PLEASE

4. Write a program that accepts an input string from the user and converts it into an array of words using an array of pointers. Each pointer in the array should point to the location of the first letter of each word. Implement this conversion in a function str_to_word which returns an integer re- flecting the number of words in the original string. To help isolate each word in the sentence, convert the spaces to NULL characters. You can assume the input string has 1 space between each word and starts with an alphanumeric character. Your program's input and output format should match the example run below. You may only use stdio.h Save your code as str_to_word.c. Example Run > This is a string. 4 word(s) found