View Compilation Error

0_0_39562053_4596.cpp: In function 'int main()':
0_0_39562053_4596.cpp:16:41: error: 'log' was not declared in this scope; did you mean 'long'?
   16 |                         printf("%.6f",1+log(x/y));
      |                                         ^~~
      |                                         long