Final answer:
String1 contains "January" and string2 contains "25" after the execution of 'cin >> string1 >> string2;'. The reading marker is positioned after the "25", leaving "2005" still unread.
Step-by-step explanation:
Given the input data: January 25, 2005, and the input statement cin >> string1 >> string2;:
- The contents of string1 after the statement is executed will be "January", because cin reads until the first whitespace by default.
- The contents of string2 will be "25", as it continues reading the next input up until the next whitespace or end of input.
- After the execution of the input statement, the reading marker is positioned after the second set of data it has read, which is "25". The remaining data "2005" has not been read and can be read by subsequent input operations.
The statement reads data into two separated variables based on whitespace, which is the default delimiter for cin.