C语言函数大全s开头1Word格式文档下载.docx

C语言函数大全s开头1Word格式文档下载.docx

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intscanf（char*format[,argument,...]）;

charlabel[20];

charname[20];

intentries=0;

intloop,age;

doublesalary;

structEntry_struct

intage;

floatsalary;

}entry[20];

/*Inputalabelasastringofcharactersrestrictingto20characters*/

\n\nPleaseenteralabelforthechart:

"

scanf（"

%20s"

label）;

fflush（stdin）;

/*flushtheinputstreamincaseofbadinput*/

/*Inputnumberofentriesasaninteger*/

Howmanyentrieswilltherebe?

（lessthan20）"

%d"

&

entries）;

/*inputanamerestrictinginputtoonlylettersupperorlowercase*/

for（loop=0;

loop

Entry%d\n"

loop）;

Name:

%[A-Za-z]"

entry[loop].name）;

/*inputanageasaninteger*/

Age:

entry[loop].age）;

/*inputasalaryasafloat*/

Salary:

%f"

entry[loop].salary）;

/*Inputaname,ageandsalaryasastring,integer,anddouble*/

\nPleaseenteryourname,ageandsalary\n"

%20s%d%lf"

name,&

age,&

salary）;

/*Printoutthedatathatwasinput*/

\n\nTable%s\n"

label）;

Compiledby%sage%d$%15.2lf\n"

name,age,salary）;

-----------------------------------------------------\n"

%4d|%-20s|%5d|%15.2lf\n"

loop+1,

entry[loop].name,

entry[loop].age,

searchpath

搜索DOS路径

char*searchpath（char*filename）;

char*p;

/*LooksforTLINKandreturnsapointer

tothepath*/

p=searchpath（"

TLINK.EXE"

SearchforTLINK.EXE:

%s\n"

p）;

/*Looksfornon-existentfile*/

NOTEXIST.FIL"

SearchforNOTEXIST.FIL:

sector

画并填充椭圆扇区

voidfarsector（intx,inty,intstangle,intendangle）;

/*requestautodetection*/

intgdriver=DETECT,gmode,errorcode;

intmidx,midy,i;

intstangle=45,endangle=135;

intxrad=100,yrad=50;

/*initializegraphicsandlocalvariables*/

initgraph（&

gdriver,&

gmode,"

"

/*readresultofinitialization*/

errorcode=graphresult（）;

if（errorcode!

=grOk）/*anerroroccurred*/

Graphicserror:

grapherrormsg（errorcode））;

Pressanykeytohalt:

getch（）;

exit

（1）;

/*terminatewithanerrorcode*/

midx=getmaxx（）/2;

midy=getmaxy（）/2;

/*loopthroughthefillpatterns*/

for（i=EMPTY_FILL;

i

/*setthefillstyle*/

setfillstyle（i,getmaxcolor（））;

/*drawthesectorslice*/

sector（midx,midy,stangle,endangle,xrad,yrad）;

/*cleanup*/

closegraph（）;

segread

读段寄存器值

voidsegread（structSREGS*segtbl）;

structSREGSsegs;

segread（&

segs）;

Currentsegmentregistersettings\n\n"

CS:

%XDS:

%X\n"

segs.cs,segs.ds）;

ES:

%XSS:

segs.es,segs.ss）;

setactivepage

设置图形输出活动页

voidfarsetactivepage（intpagenum）;

/*selectadriverandmodethatsupports*/

/*multiplepages.*/

intgdriver=EGA,gmode=EGAHI,errorcode;

intx,y,ht;

x=getmaxx（）/2;

y=getmaxy（）/2;

ht=textheight（"

W"

/*selecttheoffscreenpagefordrawing*/

setactivepage

（1）;

/*drawalineonpage#1*/

line（0,0,getmaxx（）,getmaxy（））;

/*outputamessageonpage#1*/

settextjustify（CENTER_TEXT,CENTER_TEXT）;

outtextxy（x,y,"

Thisispage#1:

outtextxy（x,y+ht,"

/*selectdrawingtopage#0*/

setactivepage（0）;

/*outputamessageonpage#0*/

Thisispage#0."

Pressanykeytoviewpage#1:

/*selectpage#1asthevisiblepage*/

setvisualpage

（1）;

setallpallette

按指定方式改变所有的调色板颜色

voidfarsetallpallette（structpalette,far*pallette）;

structpalettetypepal;

intcolor,maxcolor,ht;

inty=10;

charmsg[80];

maxcolor=getmaxcolor（）;

ht=2*textheight（"

/*grabacopyofthepalette*/

getpalette（&

pal）;

/*displaythedefaultpalettecolors*/

for（color=1;

color<

=maxcolor;

color++）

setcolor（color）;

sprintf（msg,"

Color:

%d"

color）;

outtextxy（1,y,msg）;

y+=ht;

/*waitforakey*/

/*blackoutthecolorsonebyone*/

setpalette（color,BLACK）;

/*restorethepalettecolors*/

setallpalette（&

setaspectratio

设置图形纵横比

voidfarsetaspectratio（intxasp,intyasp）;

intxasp,yasp,midx,midy;

setcolor（getmaxcolor（））;

/*getcurrentaspectratiosettings*/

getaspectratio（&

xasp,&

yasp）;

/*drawnormalcircle*/

circle（midx,midy,100）;

/*claerthescreen*/

cleardevice（）;

/*adjusttheaspectforawidecircle*/

setaspectratio（xasp/2,yasp）;

/*adjusttheaspectforanarrowcircle*/

setaspectratio（xasp,yasp/2）;

setbkcolor

用调色板设置当前背景颜色

voidfarsetbkcolor（intcolor）;

/*multiplebackgroundcolors.*/

intbkcol,maxcolor,x,y;

/*maximumcolorindexsupported*/

/*forcenteringtextmessages*/

/*loopthroughtheavailablecolors*/

for（bkcol=0;

bkcol<

bkcol++）

/*clearthescreen*/

/*selectanewbackgroundcolor*/

setbkcolor（bkcol）;

/*outputamesssage*/

if（bkcol==WHITE）

setcolor（EGA_BLUE）;

Backgroundcolor:

bkcol）;

outtextxy（x,y,msg）;

setblock

修改先前已分配的DOS存储段大小

intsetblock（intseg,intnewsize）;

unsignedintsize,segp;

intstat;

size=64;

/*（64x16）=1024bytes*/

stat=allocmem（size,&

segp）;

if（stat==-1）

Allocatedmemoryatsegment:

segp）;

else

Failed:

maximumnumberofparagraphsavailableis%d\n"

stat）;

stat=setblock（segp,size*2）;

Expandedmemoryblockatsegment:

freemem（segp）;

setbuf

把缓冲区与流相联

voidsetbuf（FILE*steam,char*buf）;

/*BUFSIZisdefinedinstdio.h*/

charoutbuf[BUFSIZ];

/*attachabuffertothestandardoutputstream*/

setbuf（stdout,outbuf）;

/*putsomecharactersin