foo.cc: In function 'bool Equal(char*, char*, int)':
foo.cc:7:25: error: 'strlen' was not declared in this scope
    7 |     for (int j = 0; j < strlen(t); j++)
      |                         ^~~~~~
foo.cc:3:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include <string>
  +++ |+#include <cstring>
    3 | using namespace std;
foo.cc: In function 'int main()':
foo.cc:19:25: error: 'strlen' was not declared in this scope
   19 |     for (int i = 0; i < strlen(s) - strlen(t) + 1; i+=strlen(t))
      |                         ^~~~~~
foo.cc:19:25: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?

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