Input File for Sum Program

Here is an input file for use with this program. The file is named input.txt.

12
7

Here is a sample run of the program with this data file:

C:/users/default/JavaLessons>java AddTwo < input.txt

Enter first number:
Enter second number:
Sum: 19

C:/users/default/JavaLessons>

Warning: The input file for this program cannot contain any characters that are not part of an integer. Each number must contain only the digits 0 through 9. Negative numbers can start with -, but positive number cannot start with a plus. The number can be separated by spaces and can be preceeded by spaces or blank lines. This input file will work:

12
-7

As will this:

12     -7

But not this:

12 +7