foo.cc: In function 'void Delete(char*, int, int)':
foo.cc:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     if (si >= 0 && si >= strlen(s) - 1) puts(s);
      |                    ~~~^~~~~~~~~~~~~~~~
foo.cc:9:23: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     if (si >= 0 && si < strlen(s) - 1)
      |                    ~~~^~~~~~~~~~~~~~~
foo.cc:14:24: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   14 |         for (i = si; i < strlen(s); i++)
      |                      ~~^~~~~~~~~~~
foo.cc:24:30: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for (i = si + len; i < strlen(s); i++)
      |                            ~~^~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:34:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   34 |     gets(s);
      |           ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:46,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:34:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
   34 |     gets(s);
      |           ^
In file included from /usr/include/stdio.h:867,
                 from /usr/include/c++/9/cstdio:42,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:46,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:235:1: note: declared here
  235 | gets (char *__str)
      | ^~~~
foo.cc:34:9: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     gets(s);
      |     ~~~~^~~
/usr/bin/ld: /tmp/cc93hsNe.o: in function `main':
foo.cc:(.text.startup+0x15): warning: the `gets' function is dangerous and should not be used.

[Hydro](https://hydro.ac)提供评测服务