View Compilation Error

0_0_34020373_19228.cpp: In function 'double mindis(int, int)':
0_0_34020373_19228.cpp:36:31: error: 'ans' was not declared in this scope
   if(point[i].x>=point[mid].x-ans&&point[i].x<=point[mid].x+ans)
                               ^
0_0_34020373_19228.cpp:46:22: error: 'ans' was not declared in this scope
    if(a[j].y-a[i].y>=ans) 
                      ^