You are creating a console application named App1.
App1 will validate user input for order entries.
You are developing the following code segment (line numbers are included for reference only):
You need to complete the code segment.
The solution must ensure that prices are positive and have two decimal places.
Which code should you insert at line 03?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Explanation:
* Regex.IsMatch Method (String, String)
Indicates whether the specified regular expression finds a match in the specified input string.
Syntax:
public static bool IsMatch(
string input,
string pattern
)
None of the given answers applies! It is said that the function has to ensure that there are two decimals. All of the regular expressions mark them as optional (“(\.\d\d)?”).
A valid regular expression would be “{0,-10}{1}”, as seen in this example:
Regex r = new Regex(@”^\d+\.\d\d$”);
Action a = (s) =>
{
Console.WriteLine(String.Format(“{0,-10}{1}”, s, r.IsMatch(s)));
};
a(“1”);
a(“1.0”);
a(“1.00”);
a(“1.000”);
a(“12”);
a(“12.0”);
a(“12.00”);
a(“12.000”);
a(“123”);
a(“123.0”);
a(“123.00”);
a(“123.000”);
Outputs:
1 False
1.0 False
1.00 True
1.000 False
12 False
12.0 False
12.00 True
12.000 False
123 False
123.0 False
123.00 True
123.000 False
0
0
I would answer C
I would eliminate A and B since Regex should be initialized.
also I would eliminate D since regex is a positive number.
0
0
Answer is C
0
0