Write function headers for the functions described below:
(i) The function validate has two parameters. The first parameter should be an integer number and the second parameter a floating point number. The function returns no value.
(ii) The function add has two floating point numbers as parameters and returns the result of adding them.
(iii) The function inputTime inputs seconds, minutes and hours and returns them as parameters to its calling function.
(iv) The function numChar returns the number of occurrences of a character in a string, both provided as parameters.