foo.cc: In function 'int main()':
foo.cc:10:28: warning: comparison of integer expressions of different signedness: 'long int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for (long i = 0; i < strlen(str1); i++)
      |                          ~~^~~~~~~~~~~~~~
foo.cc:13:26: warning: comparison of integer expressions of different signedness: 'long int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   13 |                 while (m < strlen(str))
      |                        ~~^~~~~~~~~~~~~
foo.cc:21:23: warning: comparison of integer expressions of different signedness: 'long int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   21 |                 if (m == strlen(str)) n++;
      |                     ~~^~~~~~~~~~~~~~

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