如题，我需要在main.c中使用yyrestart和yyparse，但编译会警告implicit declaration of function ‘yyrestart’ [-Wimplicit-function-declaration]我include了syntax.tab.h，还要怎么做才能不警告？
http://www.cppblog.com/woaidongmao/archive/2008/11/23/67637.html