View Compilation Error

0_0_36529407_20482.cpp: In function 'int main()':
0_0_36529407_20482.cpp:17:50: error: redeclaration of 'double ans'
     double x1,x2,y1,y2,r1,r2,ans,r0,s1,s2,s,cd,i,ans;
                                                  ^
0_0_36529407_20482.cpp:17:30: note: 'double ans' previously declared here
     double x1,x2,y1,y2,r1,r2,ans,r0,s1,s2,s,cd,i,ans;
                              ^