View Compilation Error

0_0_34113797_16174.cpp: In function 'int main()':
0_0_34113797_16174.cpp:34:17: error: 'z' was not declared in this scope
   if(ansa>=0.0&&z+ansa*cv>=0&&z+ansa*cv<=h){
                 ^
0_0_34113797_16174.cpp:37:17: error: 'z' was not declared in this scope
   if(ansb>=0.0&&z+ansa*cv>=0&&z+ansa*cv<=h){
                 ^