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Function `std.stdio.readfln`

Reads a line from stdin and parses it using formattedRead.


						
				uint readfln(alias format, Data...)(
				
  auto ref Data data
				

				);
				

				

				uint readfln(Data...)(
				
  scope const(char)[] format,
				
  auto ref Data data
				

				);

Parameters

Name	Description
format	The format string. When passed as a compile-time argument, the string will be statically checked against the argument types passed.
data	Items to be read.

Returns

Same as formattedRead: the number of variables filled. If the input ends early, this number will be less that the number of variables provided.

Example

// sum_rows.d
void main()
{
    import std.stdio;
    int a, b, c;
    while (readfln("%d %d %d", a, b, c) == 3)
    {
        writeln(a + b + c);
    }
}

% cat << EOF > input
1 2 3
4 5 6
7 8 9
EOF
% rdmd sum_rows.d < input
6
15
24

Authors

Walter Bright, Andrei Alexandrescu, Alex Rønne Petersen

License

Boost License 1.0.