/in/foo.cc: In function 'void Delete(char*, int, int)':
/in/foo.cc:54:12: warning: operation on 'i' may be undefined [-Wsequence-point]
         s[i++]=s[i+t];
           ~^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:62:5: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     gets(s); 
     ^~~~
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.cc:62:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     gets(s); 
           ^
In file included from /in/foo.cc:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccycrqP5.o: In function `main':
foo.cc:(.text.startup+0x11): warning: the `gets' function is dangerous and should not be used.