foo.cc: In function 'int main()':
foo.cc:9:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<strlen(str1);i++)
      |                 ~^~~~~~~~~~~~~
foo.cc:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for(int j=1;j<strlen(str2);j++)
      |                     ~^~~~~~~~~~~~~

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