View Compilation Error

0_0_21437440_5996.cpp: In function 'int main()':
0_0_21437440_5996.cpp:60:5: error: 'ans' was not declared in this scope
     ans++;
     ^
0_0_21437440_5996.cpp:65:18: error: 'ans' was not declared in this scope
   printf("%d\n", ans);
                  ^