运行 ID: 37113

Main.cc: In function ‘int main()’:
Main.cc:7:11: warning: ‘char* gets(char*)’ is deprecated [-Wdeprecated-declarations]
     gets(a);
           ^
In file included from /usr/include/stdio.h:862:0,
                 from /usr/include/c++/7/cstdio:42,
                 from /usr/include/c++/7/ext/string_conversions.h:43,
                 from /usr/include/c++/7/bits/basic_string.h:6361,
                 from /usr/include/c++/7/string:52,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from Main.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:232:1: note: declared here
 gets (char *__str)
 ^~~~
Main.cc:8:13: error: ‘strlen’ was not declared in this scope
     int len=strlen(a);
             ^~~~~~
Main.cc:8:13: note: suggested alternative: ‘mbrlen’
     int len=strlen(a);
             ^~~~~~
             mbrlen
Main.cc: At global scope:
Main.cc:21:1: error: expected unqualified-id before ‘for’
 for(int i=0;i