$21\mathrm{.}9$ LAB: Find largest number

Write a program that repeatedly reads in integers until a negative integer is read. The program also keeps track of the largest integer that

has been read so far and outputs the largest integer at the end.

Ex: If the input is:

$2,77,17,4,-1$

the output is:

Largest integer: $77$

Assume a user will enter at least one non$-$negative integer.

C$++$ please!