Write a C++ function named louder which accepts a pointer to a C-string as its argument. It should do 3 things: - change any period (.) in the C-string to an exclamation point (!) - change any lower...

Write a
C++ function
named louder which accepts a pointer to a C-string as its argument.  It should do 3 things:

- change any period (.) in the C-string to an exclamation point (!)

- change any lower case letter in the C-string to the corresponding upper case letter

- return the number of characters which were changed

You may assume that parameter str points to a valid, null-terminated C-string containing only alphabetic characters, spaces and periods.  You do not need to demonstrate calling this function.

Example: if str points to an array containing "Giants win." the function should change the array so that it contains "GIANTS WIN!", and should return 9.

You must use this function signature:

int louder(char *str)