Write two functions, first() and last (), described as follows: . the function first () takes a strings and a character c as arguments and returns a pointer to the first occurrence of the character c in the string s. That is, if s = "A string to be searched" and c = 'e', then the function first() returns a character pointer to the 'e' in the word "be". If the character does not occur in the string s, then the value NULL is returned. • the function last () takes a string s and a character c as arguments and returns a pointer to the last occurrence of the character c in the string s. That is, if s = "A string to be searched" and c = 'e', then the function last () returns a character pointer to the 'e' just before the 'd' in the last word. Again, if the character does not occur in the string, then the NULL pointer is returned. Write a main program which defines a string, str, which contains the sentence "A string to be searched". Your program should then prompt the user for the character to search for, c. The functions first() and last () are then called with str and c as arguments and the resulting strings (starting at the returned pointers) are printed to an output file. For example, if you type in the letter 's' as the character to search for, your program should print out: Original string: A string to be searched First occurrence of 's' starts the string: string to be searched Last occurrence of 's' starts the string: searched Test your program using the characters 'r', 'e' and 'q'. Note that the last should give the error message: Character 'q' not found.

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.