write a function named maximum that accepts two integer values as arguments and returns the value that is the greater of the two. for example, if 7 and 12 are passed as arguments to the function, the function should return 12. write a main function that prompts the user to enter two integer values and displays the value that is the greater of the two. here a sample run: enter number 1: 7 enter number 2: 12 the maximum number is: 12