View Compilation Error

0_0_37383698_2315.cpp: In function 'int main()':
0_0_37383698_2315.cpp:7:10: error: 'g' was not declared in this scope
  p=sqrt((g*l/(2*v))*(g*l/(2*v)));
          ^
0_0_37383698_2315.cpp:8:20: error: 'q' was not declared in this scope
     max=h+((v*v*(1-q))/(4*g));
                    ^