运行 ID: 37095

Main.cc: In function ‘int main()’:
Main.cc:6:8: 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 Main.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:232:1: note: declared here
 gets (char *__str)
 ^~~~
Main.cc:7:10: error: ‘strlen’ was not declared in this scope
  int len=strlen(a);
          ^~~~~~
Main.cc:7:10: note: suggested alternative: ‘mbrlen’
  int len=strlen(a);
          ^~~~~~
          mbrlen
Main.cc:14:3: error: expected ‘;’ before ‘}’ token
   }
   ^
Main.cc:17:3: error: expected ‘;’ before ‘}’ token
   }
   ^
Main.cc:6:6: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result]
  gets(a);
  ~~~~^~~