reading character by character in c from user

I'm trying to build a small and first project of mine in C. I want to build a to-do list in list for which I'm using structures, something like

struct tasks{
  int id;
  char desc[150];

I've defined maximum no. of tasks that is 100 and description can take max 150 character.

However, while creating a new task, I'm unable to store a complete sentence even temporarily during the time program is running as after space C thinks it's done; all it takes is the first word of the sentence.

I tried different things like gets(), getchar() but fails to implement it while using in structure.

Can someone point me in the right direction on how I can make the create function which can take the whole sentence as input from the user and not just one word.