C語言函數大全

c語?函數?全chm,c語?常?函數?冊chm格式.doc

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c語?常?函數?冊chm格式

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全都很詳細?例如下?的

函數名:abort功?能:異常終??個進程??法:voidabort(void);程序例:#include#include

intmain(void){?printf("Callingabort()n");?abort();?return0;/*Thisisneverreached*/}??

函數名:abs功?能:求整數的絕對值??法:intabs(inti);程序例:#include#include

intmain(void){?intnumber=-1234;

printf("number:%dabsolutevalue:%dn",number,abs(number));return0;}

函數名:absread,abswirte功?能:絕對磁盤扇區讀、寫數據??法:intabsread(intdrive,intncts,intctno,void*buffer);?int

abswrite(intdrive,intncts,intctno,void*buffer);程序例:/*absreadexample*/

#include#include#include#include

intmain(void){?inti,strt,ch_out,ctor;?charbuf[512];

printf("InrtadisketteintodriveAandpressanykeyn");getch();ctor=0;if(absread(0,1,ctor,&buf)!=0)

{perror("Diskproblem");exit(1);?}?printf("ReadOKn");?strt=3;?for(i=0;i<80;i++)?{ch_out=

buf[strt+i];putchar(ch_out);?}?printf("n");?return(0);}???

函數名:access功?能:確定?件的訪問權限??法:intaccess(constchar*filename,intamode);程序例:#include#include

intfile_exists(char*filename);

intmain(void){?printf("st:%sn",?file_exists("")?"YES":"NO");?return0;}

intfile_exists(char*filename){?return(access(filename,0)==0);}?

函數名:acos功?能:反余弦函數??法:doubleacos(doublex);程序例:#include#include

intmain(void){?doubleresult;?doublex=0.5;

result=acos(x);printf("Thearccosineof%lfis%lfn",x,result);return0;}

函數名:allocmem功?能:分配DOS存儲段??法:intallocmem(unsignedsize,unsigned*g);程序例:#include#include

#include

intmain(void){?unsigned