View Compilation Error

0_0_19355174_13382.cpp: In function 'int main()':
0_0_19355174_13382.cpp:15:30: error: 'ans' was not declared in this scope
         for(int i=0;i<n;i++) ans="0;" i="0;i<n;i++)" int="" s="">s)
                              ^
0_0_19355174_13382.cpp:20:23: error: 'ans' was not declared in this scope
         printf("%d\n",ans);
                       ^
0_0_19355174_13382.cpp: At global scope:
0_0_19355174_13382.cpp:22:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_19355174_13382.cpp:23:1: error: expected declaration before '}' token
 }
 ^