/in/foo.cc: In function 'int main()':
/in/foo.cc:101:34: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
    printf("%d\n",strlen(str)-l1+1);
                                  ^
/in/foo.cc:101:29: warning: 'l1' may be used uninitialized in this function [-Wmaybe-uninitialized]
    printf("%d\n",strlen(str)-l1+1);
                  ~~~~~~~~~~~^~~