How to make blank entry = default

Hi!

Just wondering, how to turn a normal "Enter" response to a default entry?

i.e.

Code:

---

float number1;
cin Input number: ;
if (number1 = (blank entry or "Enter"){
number1 = 0.02;
}

---

Thanks.

Use std::getline to read a line of input instead of reading the integer directly. If the line is empty, use a default value, else parse the integer from the line.

>Just wondering, how to turn a normal "Enter" response to a default entry?
First read the input into a string first. At that point, there are several different ways to proceed. Here is one method:

Code:

---

        std::string snum;
        double num;

        std::cout << "Enter a number (or press <ENTER> for default):";
        std::getline(cin, snum);

        std::istringstream converter(snum);
        converter >> num;

        if (!converter)
        {
                if (converter.eof())
                {
                        std::cout << "No value was entered.  A default value will used." << endl;
                        num = .02;
                }
        }
        std::cout << num << std::endl;

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Quote:

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Originally Posted by swoopy

>Just wondering, how to turn a normal "Enter" response to a default entry?
First read the input into a string first. At that point, there are several different ways to proceed. Here is one method:

Code:

---

        std::string snum;
        double num;

        std::cout << "Enter a number (or press <ENTER> for default):";
        std::getline(cin, snum);

        std::istringstream converter(snum);
        converter >> num;

        if (!converter)
        {
                if (converter.eof())
                {
                        std::cout << "No value was entered.  A default value will used." << endl;
                        num = .02;
                }
        }
        std::cout << num << std::endl;

---

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Sweet, thank you.