View Compilation Error

0_0_18045157_22176.cpp:45:4: error: expected unqualified-id before '/' token
   */
    ^
0_0_18045157_22176.cpp:45:4: error: expected constructor, destructor, or type conversion before '/' token
0_0_18045157_22176.cpp: In function 'int main()':
0_0_18045157_22176.cpp:50:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_18045157_22176.cpp:35:5: note: 'int main()' previously defined here
 int main()
     ^
0_0_18045157_22176.cpp:57:3: error: 'ans' was not declared in this scope
   ans[i]=ans[i-1]+sum;
   ^
0_0_18045157_22176.cpp:62:20: error: 'ans' was not declared in this scope
   printf("%.2lf\n",ans[n]);
                    ^