View Compilation Error

0_0_38685003_7072.cpp: In function 'int read()':
0_0_38685003_7072.cpp:19:31: error: 'gc' was not declared in this scope; did you mean 'c'?
   19 |         int a = 0, b = 1, c = gc();
      |                               ^~
      |                               c