/in/foo.cc: In function 'void Delete(char*, int, int)':
/in/foo.cc:54:9: warning: operation on 'i' may be undefined [-Wsequence-point]
      s[i++]=s[i+t];
        ~^~
/in/foo.cc:53:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while(i<Length(s)-t)
     ^~~~~
/in/foo.cc:55:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
  s[i]=0;
  ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:62:2: 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:62:8: 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/ccuSqtzB.o: In function `main':
foo.cc:(.text.startup+0x11): warning: the `gets' function is dangerous and should not be used.