c语言常用函数手册 chm格式.doc

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1、c语言常用函数手册chm格式.softii./downinfo/19389.html 全都很详细 例如下面的 函数名:abort功 能:异常终止一个进程用 法:voidabort(void);程序例:#include#includeintmain(void){ printf("Callingabort()"); abort(); return0;/*Thisisneverreached*/}  函数名:abs功 能:求整数的绝对值用 法:intabs(inti);程序例:#include#includeintmain

2、(void){ intnumber=-1234; printf("number:%d absolutevalue:%d",number,abs(number)); return0;}  函数名:absread,abswirte功 能:绝对磁盘扇区读、写数据用 法:intabsread(intdrive,intnsects,intsectno,void*buffer); intabswrite(intdrive,intnsects,intsectno,void*buffer);程序例:/*absreadexample*/#include#include#

3、include#includeintmain(void){ inti,strt,ch_out,sector; charbuf[512]; printf("InsertadisketteintodriveAandpressanykey"); getch(); sector=0; if(absread(0,1,sector,&buf)!=0) {    perror("Diskproblem");    exit(1); } printf("ReadOK"); strt=3; for(i=0;i<80;i++) {    ch_out=buf[strt

4、+i];    putchar(ch_out); } printf(""); return(0);}   函数名:access功 能:确定文件的访问权限用 法:intaccess(constchar*filename,intamode);程序例:#include#includeintfile_exists(char*filename);intmain(void){ printf("DoesNOTEXIST.FILexist:%s", file_exists("NOTEXISTS.FIL")?"YES":"NO"); return0;}intfile_ex

5、ists(char*filename){ return(access(filename,0)==0);} 函数名:acos功 能:反余弦函数用 法:doubleacos(doublex);程序例:#include#includeintmain(void){ doubleresult; doublex=0.5; result=acos(x); printf("Thearccosineof%lfis%lf",x,result); return0;}  函数名:allocmem功 能:分配DOS存储段用 法:intallocmem(unsignedsize,u

6、nsigned*seg);程序例:#include#include#includeintmain(void){ unsignedintsize,segp; intstat; size=64;/*(64x16)=1024bytes*/ stat=allocmem(size,&segp); if(stat==-1)    printf("Allocatedmemoryatsegment:%x",segp); else    printf("Failed:maximumnumberofparagraphsavailableis%u",   

7、        stat); return0;}  函数名:arc功 能:画一弧线用 法:voidfararc(intx,inty,intstangle,intendangle,intradius);程序例:#include#include#include#includeintmain(void){   /*requestauto