View Compilation Error

0_0_38680138_20735.cpp: In function 'int rd()':
0_0_38680138_20735.cpp:22:27: error: 'gc' was not declared in this scope; did you mean 'c'?
   22 |     int a = 0, b = 1, c = gc();
      |                           ^~
      |                           c