foo.cc: In constructor 'Student::Student(const char*, int)':
foo.cc:13:18: warning: argument to 'sizeof' in 'void* memcpy(void*, const void*, size_t)' call is the same expression as the source; did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess]
   13 |   memcpy(name,ch,sizeof(ch));
      |                  ^~~~~~~~~~
foo.cc: In function 'void ShellSort(std::vector<Student>&)':
foo.cc:43:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Student>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for(int i=0;i<v.size()-gap;i++)
      |               ~^~~~~~~~~~~~~

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