fgets (name, 100, stdin);
100 is the max length of the buffer. You should adjust it as per your need.
scanf ("%[^\n]%*c", name);
 is the scanset character.
[^\n] tells that while the input is not a newline (
'\n') take input. Then with the
%*c it reads the newline character from the input buffer (which is not read), and the
*indicates that this read in input is discarded (assignment suppression), as you do not need it, and this newline in the buffer does not create any problem for next inputs that you might take.
Read here about the scanset and the assignment suppression operators.
Note you can also use
gets but ….