C++

You will write 3 functions:

int readDoubleArray (double d[], int size) which reads numbers into double array d[] until size numbers have been read, or until the user types a non-numeric, whichever comes first. Returns the number of array elements read. Be sure to call cin.clear() followed by cin.ignore(80, ' ') before returning from the function, to empty the input buffer and remove the fail() condition caused by the non-numeric.

double dotProduct(double a[], double b[], int size) which returns the sum of the products of a[i]*b[i], for arrays of length "size"

void printDoubleArray (double d[], int size) which prints the numbers in d[] on a single line, separated by a comma and a space, terminated with endl

Your main() program should:

(1) Prompt the user to enter a list of numbers followed by a non-numeric. Call readDoubleArray() to put them into a double array already declared: Ex:

Enter a list of numbers followed by a non-numeric: -1 2.2 3 q 

(2) Prompt the user to enter a second list of numbers, with the same # of items as the first. followed by a non-numeric. Call readDoubleArray() to put them into another double array already declared: Ex:

Enter more numbers, same number of elements, followed by a non-numeric: 2 4.1 5 q 

(3) Call the dot product function and print the results, and print the array contents using printDoubleArray(): Ex:

The dot product of: -1, 2.2, 3 and 2, 4.1, 5 is 22.02 

(4) If the user enters no numbers for either array, just a non-numeric, print "Error: zero length array input" and exit the program. This error check should NOT be in readDoubleArray(), it should be in the main() program when it checks the size returned by readDoubleArray(): Ex:

Enter a list of numbers followed by a non-numeric: -q Error: zero length array input