yorktown

Repair this code

Repair the average so an empty array returns 0 instead of dividing by zero.

today's brief

September 1997. The USS Yorktown, a Navy cruiser running a Windows NT Smart Ship control system, takes a zero typed into a database field. A calculation divides by that zero, the error cascades through the propulsion software, and a billion dollar warship sits dead in the water, towed back to port. The whole ship was stopped by one unchecked denominator. Guard the division.

See it in action

average({10,20,30}, 3)

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return the integer average of the first n values of a (their sum divided by n, truncated).
When n is 0, there is nothing to average: return 0 instead of dividing by zero.
The starter divides by n with no check. Add the guard.

More examples

average({}, 0)

Expected result

average({1,2,3,4}, 4)

Expected result

Constraints

Expected files

avg.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions

yorktown

Repair this code

Repair the average so an empty array returns 0 instead of dividing by zero.

today's brief

See it in action

average({10,20,30}, 3)

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return the integer average of the first n values of a (their sum divided by n, truncated).
When n is 0, there is nothing to average: return 0 instead of dividing by zero.
The starter divides by n with no check. Add the guard.

More examples

average({}, 0)

Expected result

average({1,2,3,4}, 4)

Expected result

Constraints

Expected files

avg.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions