View Compilation Error

0_0_21600364_25081.cpp: In function 'int main()':
0_0_21600364_25081.cpp:19:12: error: 'doublecmid' was not declared in this scope
            doublecmid = cal(mid);
            ^
0_0_21600364_25081.cpp:20:12: error: 'doublecmidmid' was not declared in this scope
            doublecmidmid = cal(midmid);
            ^
0_0_21600364_25081.cpp:21:15: error: 'cmid' was not declared in this scope
            if(cmid> cmidmid)
               ^
0_0_21600364_25081.cpp:21:21: error: 'cmidmid' was not declared in this scope
            if(cmid> cmidmid)
                     ^