C scanf requested format [duplicate]

Answer 1

Sounds like you just want to ignore whitespace, so add spaces to your format where it might occur:

scanf(" { [%lf ;%lf ] , [%lf ;%lf ] , [%lf ;%lf ] }", ...)

The only place you don't need it is immediately before %lf as that specifier automatically skips and ignores whitespace. Be sure to check the return value to ensure you matched 6 values. Unfortunately this will not tell you if the trailing ] or } is missing. For that you can add an extra %n specifier at the end and check to make sure it gets set:

int end = 0;
if (scanf(" { [%lf ;%lf ] , [%lf ;%lf ] , [%lf ;%lf ] }%n", ..., &end), end > 0) {
    // successful read
} else {
    // error
}