Formatted Input

What is formatted input? #

It is possible to specify the format of the data expected to be read as input using readf. It specifies both the data that should be read and the characters that should be ignored.

D’s input format specifiers are similar to the ones present in the C language. As previously used, the format specifier " %s" reads the data according to the type of the variable. For example, since the type of the variable used in readf is double, the characters read at the input would be treated as a floating point number:

double number;
readf(" %s", &number);

The format string can contain three types of information:

• The space character: indicates zero or more whitespace characters at the input and specifies that all of those characters should ...