Reading a specific input format in C

Question

I need to read all N numbers in a line in an array where N is unknown. When a newline is encountered, read the next X numbers in another array. X is also unknown.

The input is in the format:-

1 2 3 4 5 .. to N (store in array A)

1 2 3 4 .. to X (store in array B).

How to take the input for this case?

Answer 1

you can try

while ( scanf(" %d%c", &num, &ch) == 2 )
{
    if ( ch =='\n') break;
    // to do :: store or whatever you want 
}

it read untill get newline.