new line in console when I use cin

Question

I have problem with an C++ exercise.

In the exercise I am supposed to make the user enter a date.

The problem is when I use cin the console jumps one line down when I push enter, so that it becomes something like this:

Enter date please: 12

/23

/2001

instead of: 12/23/2001

Can someone please help me overcome this problem.

Do you want to read it to string or to three integers or where? — Blood, Jul 05 '12 at 21:41
You could read the entire string as `12/23/2001` and then split it by the `/` char. — Tudor, Jul 05 '12 at 21:41
Apart from parsing on `/` as Tudor suggests could you not just read cin 3 times for date, month and year if that is easier for you to code? — EdChum, Jul 05 '12 at 21:43

score 6 · Answer 1 · answered Jul 05 '12 at 21:45

6

You don't say how you use cin to read the date. Try this:

char ignored;
int day, month, year;
std::cin >> month >> ignored >> day >> ignored >> year;

Then, when you run your program, don't push enter until you've typed in the entire date.

answered Jul 05 '12 at 21:45

Robᵩ

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score 4 · Answer 2 · edited May 23 '17 at 11:48

Robᵩ has a good answer, but I'm going to extend it. Use a struct, and an overloaded operator, and check the slashes.

struct date {
    int day;
    int month;
    int year;
};
std::istream& operator>>(std::istream& in, date& obj) {
    char ignored1, ignored2;
    in >> obj.day>> ignored1 >> obj.month>> ignored2 >> obj.year;
    if (ignored1!='/' || ignored2!='/')
        in.setstate(in.rdstate() | std::ios::badbit);
    return in;
}

If you have code for streaming in literals, this can be simplified to:

std::istream& operator>>(std::istream& in, date& obj) {
    return in >> obj.day>> '/' >> obj.month>> '/' >> obj.year;
}

Interesting thing with the streaming in literals; I never thought about that. — chris, Jul 05 '12 at 22:06

new line in console when I use cin

2 Answers2