View Compilation Error

0_0_25722799_27376.cpp: In function 'double calculate(double, double, double, double)':
0_0_25722799_27376.cpp:13:6: error: 'MAX' was not declared in this scope
   K1=MAX;
      ^
0_0_25722799_27376.cpp:16:6: error: 'MAX' was not declared in this scope
   K2=MAX;
      ^