includestringh>voidmain(void){inta=15,b=24;printf(a=%db=%dn,a,b);a=a^b;b=b^a;a=a^b;printf(a=%db=%
includestringh>include2440addrhinclude2440libhincludeOptionhincludedefhintflag;中断标志（在中断子程序里清零，
includestringh>includestdioh>defineF_CPU7372800includeutildelayh>includeavrioh>definedel
includestringh>includestdioh>defineF_CPU7372800includeutildelayh>includeavrioh>includeav
＃includeREGX52h>＃includestdioh>＃includeabsacch>＃includeintrinsh>＃includestringh>pragm
includereg52h>includeintrinsh>includestringh>defineucharunsignedchardefineuintunsignedintuc
一、例程测试：1编写includesh文件ifndef__INCLUDES_H__define__INCLUDES_H__includestdioh>includestringh>
