View Compilation Error

0_0_27488461_18017.cpp: In function 'int main()':
0_0_27488461_18017.cpp:87:25: error: 'ansstart' was not declared in this scope
                         ansstart=tstart;
                         ^
0_0_27488461_18017.cpp:88:25: error: 'ansend' was not declared in this scope
                         ansend=tend;
                         ^
0_0_27488461_18017.cpp:101:13: error: 'ansstart' was not declared in this scope
             ansstart=tstart;
             ^
0_0_27488461_18017.cpp:102:13: error: 'ansend' was not declared in this scope
             ansend=tend;
             ^
0_0_27488461_18017.cpp:105:20: error: 'ansstart' was not declared in this scope
         else cout<<ansstart<<" "<<ansend<<endl;
                    ^
0_0_27488461_18017.cpp:105:35: error: 'ansend' was not declared in this scope
         else cout<<ansstart<<" "<<ansend<<endl;
                                   ^