how to take continuous input in c++ until any value. Like for example(taking input until giving q)

Example: how to take continuous input in c++ until any value. Like for example(taking input until giving q)

summ = 0
count = 1
while raw_input("Enter q to quit or any other key to continue") != 'q':
    summ = summ+input()
    count=count+1
print summ/(count*1.0)