How do you make Decimal fraction in c plus plus?

Answer 1

Use a double or a float data type. While these are suitable for most floating point purposes, there may be times when you need to deal with extremely small or extremely large numbers with a higher degree of accuracy than is possible with the built-in types. In these cases you must either define your own data type or use a third-party data type. For instance, calculating the millionth decimal digit of pi cannot be achieved with the built-in types alone.