How do you alter the following scanf statement in C?

I have the following line of code: scanf("%[^.]s)", string);

My problem is that this terminates the user input after the user enters a period, followed by Enter.

for ex: Enter a string: Today is nice.

How can I change this statement so that user would need to enter a new line, followed by a period and then press Enter so that the input would terminate?

for ex. Enter a string: Today is nice

.