Lab 10

1) Write a value-returning function with two parameters: an array a of 
type float and an int n representing the size of the array. The function 
should return the number of negative elements of the array. The function 
should not print or read anything. Write a driver program to test your 
function.

2) Write a value-returning function with two parameters: an array a of 
type char and an int n representing the size of the array. The function 
should return the number of vowels (lowercase or uppercase) in the array. 
The function should not print or read anything. Write a driver program to 
test your function.

3) Write a program to read in a two-dimensional array a of 4 rows and two 
columns. Then find the average of the elements of the array and print the 
array neatly.