C語言函數(shù)大全(h開頭)

C語言函數(shù)大全(h開頭)功能:建立一個硬件錯誤處理程序

用法:voidharderr(int(*fptr)());

程序例:

/*Thisprogramwilltrapdiskerrorsandprompt

theuserforaction.Tryrunningitwithno

diskindriveA:toinvokeitsfunctions.*/

#include

#include

#include

#defineIGNORE0

#defineRETRY1

#defineABORT2

intbuf[500];

/*definetheerrormessagesfortrappingdiskproblems*/

staticchar*err_msg[]={

“writeprotect“,

“unknownunit“,

“drivenotready“,

“unknowncommand“,

“dataerror(CRC)“,

“badrequest“,

“seekerror“,

“unknownmediatype“,

“sectornotfound“,

“printeroutofpaper“,

“writefault“,

“readfault“,

“generalfailure“,

“reserved“,

“reserved“,

“invaliddiskchange“

};

error_win(char*msg)

{

intretval;

cputs(msg);

/*promptforusertopressakeytoabort,retry,ignore*/

while(1)

{

retval=getch();

if(retval==’a’||retval==’A’)

{

retval=ABORT;

break;

}

if(retval==’r’||retval==’R’)

{

retval=RETRY;

break;

}

if(retval==’i’||retval==’I’)

{

retval=IGNORE;

break;

}

}

return(retval);

}

/*pragmawarn-parreduceswarningswhichoccur

duetothenonuseoftheparameterserrval,

bpandsitothehandler.*/

#pragmawarn-par

inthandler(interrval,intax,intbp,intsi)

{

staticcharmsg[80];

unsigneddi;

intdrive;

interrorno;

di=_DI;

/*ifthisisnotadiskerrorthenitwas

anotherdevicehavingtrouble*/

if(ax<0)

{

/*reporttheerror*/

error_win(“Deviceerror“);

/*andreturntotheprogramdirectlyrequestingabort*/

hardretn(ABORT);

}

/*otherwiseitwasadiskerror*/

drive=ax

errorno=di

/*reportwhicherroritwas*/

sprintf(msg,“Error:%sondrive%c\r\nA)bort,R)etry,I)gnore:“,

err_msg[errorno],’A’+drive);

/*

returntotheprogramviadosinterrupt0x23withabort,retry,

orignoreasinputbytheuser.

*/

hardresume(error_win(msg));

returnABORT;

}

#pragmawarn+par

intmain(void)

{

/*

installourhandleronthehardwareprobleminterrupt

*/

harderr(handler);

clrscr();

printf(“MakesurethereisnodiskindriveA:\n“);

printf(“Pressanykey....\n“);

getch()