View Compilation Error

0_0_25927512_32090.cpp: In function 'bool cmp(int, int)':
0_0_25927512_32090.cpp:4:9: error: 'a' was not declared in this scope
  return a<b;
         ^
0_0_25927512_32090.cpp:4:11: error: 'b' was not declared in this scope
  return a<b;
           ^