View Compilation Error

0_0_39769499_5616.cpp: In function 'int main()':
0_0_39769499_5616.cpp:15:17: error: 'strlen' was not declared in this scope
   15 |             len=strlen(str);
      |                 ^~~~~~
0_0_39769499_5616.cpp:3:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<string>
  +++ |+#include <cstring>
    3 | int main()