(If you are learning C language, you should download these functions to see and check the usage of the functions. Function name: abort function: abnormally stop a process Usage: voidabort(void); .hgt;intmain(void){printf(Callingabort()\n);abort();return0;/
Thisisneverreached
/} Function name: abs Function: Find the positive value of an integer Usage: intabs(inti); Program example: #includelt;stdio.hgt;#includelt;math.hgt;intmain(void){intnumber=-1234;printf(number :?bsolutevalue:
n,number,abs(number));return0;}Function name:absread,abswirteFunction: sure disk sector read and write data Usage: intabsread(intdrive,intnsects,intsectno,void
buffer);intabswrite(intdrive,intnsects,intsectno,void
buffer); program example:/
absreadexample
/#includelt;stdio.hgt;#includelt;conio.hgt;#includelt;process.hgt;#includelt;dos.hgt;intmain(void){inti,strt,ch_out,sector;charbuf[512];printf(InsertadisketteintodriveAandpressanykey \n);getch();sector=0;if(absread(0,1,sector,buf)!=0){perror(Diskproblem);exit(1);}printf(ReadOK\n);strt=3 ;for(i=0;ilt;80;i ){ch_out=buf[strt i];putchar(ch_out);}printf(\n);return(0);}function name: access function: determine the file's Access permission usage: intaccess(constchar
filename,intamode);Program example:#includelt;stdio.hgt;#includelt;io.hgt;intfile_exists(char
filename);intmain(void){printf(DoesNOTEXIST.FILexist:%s\n,file_exists(NOTEXISTS.FIL)?YES:NO);return0;}intfile_exists(char
filename){return(access(filename,0)==0);}function name: acos function: arc cosine function usage: doubleacos(doublex); program example: #includelt;stdio.hgt;#includelt;math.hgt; intmain(void){doubleresult;doublex=0.5;result=acos(x);printf(Thearccosineof%lfis%lf\n,x,result);return0;}There are many more, please come down and see if you are not here, then register quickly
C function quick check.chm
readme.txt
.....too many files .....)
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