View Compilation Error

0_0_30111862_20215.cpp: In function 'int main()':
0_0_30111862_20215.cpp:198:19: error: 'ans1' was not declared in this scope
     if (fabs(area(ans1,a,b)-area(ans2,x,y))>eps) while(1);
                   ^
0_0_30111862_20215.cpp:198:34: error: 'ans2' was not declared in this scope
     if (fabs(area(ans1,a,b)-area(ans2,x,y))>eps) while(1);
                                  ^