View Compilation Error

0_0_39303772_13120.cpp: In function 'int main()':
0_0_39303772_13120.cpp:23:11: error: 'strlen' was not declared in this scope
   23 |         n=strlen(t);
      |           ^~~~~~
0_0_39303772_13120.cpp:3:1: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;