View Compilation Error

0_0_22495099_16112.cpp: In function 'int main()':
0_0_22495099_16112.cpp:22:9: error: 'ans' was not declared in this scope
         ans=1;
         ^
0_0_22495099_16112.cpp:23:13: error: conflicting declaration 'int t'
         int t;
             ^
0_0_22495099_16112.cpp:20:18: note: previous declaration as 'double t'
         double v,t,s;
                  ^