C-Primer-Plus(第五版)全书源代码

//chapter01

/*

#include<stdio.h>

intmain(void)

(

intdogs;

printf("Howmanydogsdoyouhave?\n");

scanf(n%dn,Sdogs);

nn

printf(Soyouhave%ddog(s)!\nzdogs);

return0;

)

*/

/////////////////////////////////////////////////////////

/////////

/////////////////////////////////////////////////////////

IIIlliIII

//chapter02

//fathm_ft.c一一converts2fathomstofeet

/★

#include<stdio.h>

intmain(void)

intfeetzfathoms;

fathoms=2;

feet=6*fathoms;

printf("Thereare%dfeetin%dfathoms!\nn,feet,

fathoms);

nn

printf(YesAIsaid%dfeet!\n,6*fathoms);

return0;

)

*/

/////////////////////////////////////////////////////////

/////////

/*

#include<stdio.h>

intmain(void)//asimpleprogram

(

intnum;//defineavariablecallednum

num=1;//assignavaluetonum

printf(nIamasimplen);//usetheprintf()function

printf("computer.\nn);

printf("Myfavoritenumberis%dbecauseitis

first.\nn,num);

return0;

)*/

/////////////////////////////////////////////////////////

/////////

//two_func.c-aprogramusingtwofunctionsinonefile

/*

#include<stdio.h>

voidbutler(void);//ISO/ANSICfunctionprototyping

intmain(void)

(

printf("Iwillsummonthebutlerfunction.\n");

butler();

printf("Yes.BringmesometeaandwriteableCD-ROMS.\n");

return0;

)

voidbutler(void)//startoffunctiondefinition

{

printf("Yourang,sir?\n");

)

*/

/////////////////////////////////////////////////////////

/////////

/////////////////////////////////////////////////////////

/////////

//chapter03数据和C

/*

//altnames.c一一portablenamesforintegertypes

#include<stdio.h>

#include<inttypes.h>//supportsportabletypesthe

systemdoesn*tcontaintheheaderfile

intmain(void)

(

intl6_tmel6;//mel6a16-bitsignedvariable

mel6=4593;

printf("First,assumeintl6_tisshort:n);

printf("mel6=%hd\n",mel6);

printf("Next,let1snotmakeanyassumptions.\nn);

printf("Instead,usea\"macro\nfrominttypes.h:n);

printf("mel6=%"PRIdl6”\n",mel6);

return0;

)

*/

/////////////////////////////////////////////////////////

/////////

/*

//bases.c一一prints100indecimal,octal,andhex

#include<stdio.h>

intmain(void)

intx=100;

printf("dec=%d;octal=%o;hex=%x\n",x,x,x);

printf("dec=%d;octal=%#o;hex=%#x\nn,x,x,x);

//%#十六进制前显示Ox//八进制数前显示。

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*

//charcode.c-displayscodenumberforacharacter

#include<stdio.h>

intmain(void)

(

charch;

printf(nPleaseenteracharacter.\nn);

n

scanf("%cr&ch);

printf("Thecodefor%cis%d.\n",ch,ch);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

*

//printl,c-displayssomepropertiesofprintf()

#include<stdio.h>

intmain(void)

intten=10;

inttwo=2;

printf("Doingitright:n);

n

printf(%dminus%dis%d\n",ten,2rten-two);

printf("Doingitwrong:");

printf("%dminus%dis%d\nn,ten);//forgot2arguments

return0;

)

*

/////////////////////////////////////////////////////////

/////

/*print2.c-moreprintf()properties*/

*

#include<stdio.h>

intmain(void)

unsignedintun=3000000000;//systemwith32-bitint

shortend=200;//and16-bitshort

longbig=65537;

longverybig=12345678908642;

//c也可以使用前缀h来表示short类型。

〃因此％1«1显示一个十进制的short整型。%ho为八进制形式。

n

printf(un=%uandnot%d\n"，unrun);

nn

printf(end=%hdand%d\n,endzend);

printf(nbig=%ldandnot%hd\nn,big,big);

printf(nverybig=%lldandnot%ld\n”，verybig,verybig);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*showf_pt.c——displaysfloatvalueintwoways*/

/*

#include<stdio.h>

intmain(void)

(

floataboat=32000.0;

doubleabet=2.14e9;

longdoubledip=5.32e-5;

printf("%fcanbewritten%e\nn,aboat,aboat);

printf("%fcanbewritten%e\n",abet,abet);

n

printf("%fcanbewritten%e\nrdip,dip);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*toobig.c-exceedsmaximumintsizeonoursystem*/

/*

#include<stdio.h>

intmain(void)

(

inti=2147483647;

unsignedintj=4294967295;

nn

printf(%d%d%d\nzi,i+lzi+2);

printf(n%u%u%u\nn,j,j+1,j+2);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*typesize.c一一printsouttypesizes*/

/*

#include<stdio.h>

intmain(void)

(

//c99providesa%zdspecifierforsizes

printf("Typeinthasasizeof%ubytes.\n",sizeof(int));

//4bytes

printf("Typecharhasasizeof%ubytes.\nn,

sizeof(char));//1bytes

printf(nTypelonghasasizeof%ubytes.\nn,

sizeof(long));//4bytes

n

printf("Typedoublehasasizeof%ubytes.\nr

sizeof(double));//8bytes

return0;

)

*/

/////////////////////////////////////////////////////////

11III

/////////////////////////////////////////////////////////

/////

//chapter04字符串的格式化输入/输出

//defines.c一一usesdefinedconstantsfromlimit.handfloat.

//thisisuseful,youcanknowsomelimitsofthesystem

/*

#include<stdio.h>

#include<limits.h>//integerlimits

#include<float.h>//floating-pointlimits

intmain(void)

(

printf(nSomenumberlimitsforthissystem:\nn);

printf("Biggestint:%d\nn,INT_MAX);

printf(nSmallestlonglong:%lld\n",LONG_MIN);

printf("Onebyte=%dbitsonthissystem.\nn,CHAR_BIT);

printf("Largestdouble:%e\nn,DBL_MAX);

printf("Smallestnormalfloat:%e\nn,FLT_MIN);

printf("floatprecision=%ddigits\n"rFLT_DIG);

nn

printf(floatepsilon=%e\nzFLT_EPSILON);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/★flags.c--illustratessomeformattingflags★/

/*

#include<stdio.h>

intmain(void)

nn

printf(%x%X%#x\n,31z31,31);

nn

printf(**%d**%d**%d**\nz42,42,-42);

printf("**%5d**%5.3d**%05d**%05.3d**\nn,6,6,6,6);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*floatcnv.c一一mismatchedfloating-pointconversions*/

/*

#include<stdio.h>

intmain(void)

(

floatnl=3.0;

doublen2=3.0;

longn3=2000000000;

longn4=1234567890;

printf("%.Ie%.Ie%.Ie%.le\nn,nl,n2,n3,n4);

printf(n%ld%ld\nn,n3,n4);

printf(n%ld%ld%ld%ld\nn,nl,n2,n3,n4);

return0;

}

*/

/////////////////////////////////////////////////////////

/////

//floats.c-somefloating-pointcombinations

/*

#include<stdio.h>

intmain(void)

(

constdoubleRENT=3852.99;//const-styleconstant

printfRENT);

printf("*%e*\n",RENT);

printf("*%4.2f*\n",RENT);

printf("*%3.1f*\n",RENT);//take

carehere

printf("*%10.3f*\n",RENT);

printf("*%10.3e*\n",RENT);

printf("*%+4.2f*\n",RENT);

printf("*%010,2f*\n",RENT);

return0;

)

*/

/////////////////////////////////////////////////////////

/////

/*intconv.c一一somemismatchedintegerconversions★/

/*

#include<stdio.h>

#definePAGES336

#defineWORDS65618

intmain(void)

(

shortnum=PAGES;

shortmnum=S;

printf(nnumasshortandunsignedshort:%hd%hu\nn,num,

num);

printf(n-numasshortandunsignedshort:%hd%hu\nn,

mnum,

mnum);

printf("numasintandchar:%d%c\n",num,num);

printf("WORDSasint,short,andchar:%d%hd%c\n",

WORDS,WORDS,WORDS);

return0;

)

*/

/////////////////////////////////////////////////////////

////

/*longstrg.c一一printinglongstrings*/

/*

#include<stdio.h>

intmain(void)

//takecareofthisprogram

(

printf("Here'sonewaytoprintan);

printf("longstring.\n");

printf("Here1sanotherwaytoprinta\

longstring.\nn);

printf("Here1sthenewestwaytoprinta”

nlongstring.\nn);//ANSIC

return0;

)

*/

/////////////////////////////////////////////////////////

////

/*praisel.c--usesanassortmentofstrings*/

/*

#include<stdio.h>

#definePRAISEnWhatasupermarvelousname!n

intmain(void)

charname[40];

printf("What1syourname?\n");

scanf(n%sH,name);

printf("Hello,%s.%s\nn,name,PRAISE);

H

printf("Hello,%s.%s\nrname,"verygood");

//takecareofhere

return0;

)

*/

/////////////////////////////////////////////////////////

IIII

/★praise2.c*/

/*

#include<stdio.h>

#include<string.h>//providesstrlen()prototype

#definePRAISEnWhatasupermarvelousname!n

intmain(void)

(

charname[40];

printf("Whatfsyourname?\n");

scanf(n%sn,name);

printf("Hello,%s.%s\nn,name,PRAISE);

printf(nYournameof%dlettersoccupies%dmemory

n

cells.\nr

strlen(name)rsizeofname);

printf("Thephraseofpraisehas%dletters”，

strlen(PRAISE));

printf(nandoccupies%dmemorycells.\n",sizeofPRAISE);

return0;

)

*/

/////////////////////////////////////////////////////////

////

/*printout.c一一usesconversionspecifiers*/

/*

#include<stdio.h>

#definePI3.141593

intmain(void)

(

intnumber=5;

floatespresso=13.5;

intcost=3100;

nn

printf(The%dCEOsdrank%fcupsofespresso.\nrnumberz

espresso);

n

printf("Thevalueofpiis%f.\nrPI);

printf(nFarewell!thouarttoodearformy

possessing,\nn);

printf(n%c%d\nn,*$1,2*cost);

return0;

)

*/

/////////////////////////////////////////////////////////

Illi

/*prntval.c一一findingprintf()1sreturnvalue★/

/*

#include<stdio.h>

intmain(void)

(

intbph2o=212;

intrv;

rv=printf("%dFiswater1sboilingpoint.\nn,bph2o);

nn

printf(Theprintf()functionprinted%dcharacters.\nr

IIfindingprintf()1sreturnvalue==howmanycharacters

printed

rv);

return0;

)

*/

/////////////////////////////////////////////////////////

////

/*skip2.c一一skipsoverfirsttwointegersofinput*/

/*

#include<stdio.h>

intmain(void)

(

intn;

printf("Pleaseenterthreeintegers:\nn);

scanf(n%*d%*d%d”，&n);

//*meansskip

printf(nThelastintegerwas%d\n",n);

return0;

)

*/

/////////////////////////////////////////////////////////

Illi

/*strings.c一一stringformatting*/

/*

#include<stdio.h>

#defineBLURB"Authenticimitation!n

intmain(void)

(

printf(n/%2s/\nn,BLURB);

//stilldon'tunderstandclearly

nn

printf(/%24s/\nzBLURB);

printf(n/%24.5s/\nn,BLURB);

printf(n/%-24.5s/\nn,BLURB);

return0;

)

*/

//////////////////////////////////////////

/*varwid.c一一usesvariable-widthoutputfield*/

/*

#include<stdio.h>

intmain(void)

(

unsignedwidth,precision;

intnumber=256;

doubleweight=242.5;

printf(nWhatfieldwidth?\nn);

scanf("%d",fiwidth);

printf(nThenumberis:%*d:\nn,width,number);

printf(nNowenterawidthandaprecision:\nn);

//stilldon'tunderstandclearly

scanf("%d%d"r&width,fiprecision);

printf("Weight=%*.*f\nn,width,precision,weight);

//%*.*f%24.5swhatdoesismean?

printf("Done!\n");

return0;

)

*/

111111111111111111111111111111111111111111

/*width.c--fieldwidths*/

/*

#include<stdio.h>

#definePAGES931

intmain(void)

{

printf("*%d*\n",PAGES);//stillwillprint931

printf("*%2d*\n",PAGES);//stillwillprint

931

printf("*%10d*\n",PAGES);

printf("*%-10d*\n",PAGES);

return0;

)

*/

//////////////////////////////////////////

/////////////////////////////////////////////////////////

Illi

//chapter05运算符、表达式和语句

/*add_one.c一一incrementing:prefixandpostfix*/

/*

#include<stdio.h>

intmain(void)

(

intultra=0,super=0;

while(super<5)

{

super++;

++ultra;

printf("super=%d,ultra=%d\n",superrultra);

)

return0;

)

*/

///////////////////////////////////////

/*addemup.c一一fourkindsofstatements*/

/*

#include<stdio.h>

intmain(void)//findssumoffirst20integers

intcountrsum;

intnum=O;

count=0;

sum=0;

while(count++<20)//youshouldtakecare

of

{

num++;

sum=sum+count;

printf(ncount=%dsum=%d\nn,count,sum);

)

printf("thetimeofloopis%d\n",num);

return0;

)

*/

/////////////////////////////////////////////////////////

/////////////

/*bottles.c一一countingdown*/

/*

#include<stdio.h>

#defineMAX10

intmain(void)

intcount=MAX+1;

while(——count>0){

printf(n%dbottlesofspringwateronthewall,”

n%dbottlesofspringwater!\nn,count,count);

printf("Takeonedownandpassitaround,\nn);

n

printf("%dbottlesofspringwater!\n\nrcount-1);

)

return0;

)

*/

/////////////////////////////////////////////////////////

/////////////

/*shoesl.c一一convertsashoesizetoinches*/

/*

#include<stdio.h>

#defineADJUST7.64

#defineSCALE0.325

intmain(void)

(

doubleshoe,foot;

shoe=9.0;

foot=SCALE*shoe+ADJUST;

printf("Shoesize(men1s)footlength\nn);

printf(n%10.If%15.2finches\nn,shoe,foot);

return0;

)

*/

///////////////////////////////////////////////////////

/*shoes2.c——calculatesfootlengthsforseveralsizes*/

/*

#include<stdio.h>

#defineADJUST7.64

#defineSCALE0.325

intmain(void)

(

doubleshoe,foot;

printf(nShoesize(men*s)footlength\nn);

shoe=3.0;

while(shoe<18.5)

(

foot=SCALE*shoe+ADJUST;

printf(n%10.If%15.2finches\nn,shoe,foot);

shoe=shoe+1.0;

)

printf(nIftheshoefits,wearit.\nn);

return0;

)*/

/////////////////////////////////////////////////////////

/////////////

/*golf.c——golftournamentscorecard*/

/*

#include<stdio.h>

intmain(void)

(

intjane,tarzan,cheeta;

cheeta=tarzan=jane=68;

printf(ncheetatarzanjane\nn);

printf("Firstround

score%4d%8d%8d\nn,cheeta,tarzan,jane);

return0;

)

*/

///////////////////////////////////////////////

/*squares.c一一producesatableoffirst20squares*/

/*//havefun,you

canlearnmuch

#include<stdio.h>

intmain(void)

intnum=1;

while(num<21)

{

printf(n%4d%6d\nn,num,num*num);

num=num+1;

)

return0;

)

*/

///////////////////////////////////////////////

/*wheat.c——exponentialgrowth*/

/*//棋盘赠大

米，国王傻眼啦

#include<stdio.h>

#defineSQUARES64//squaresonacheckerboard

#defineCROP1E15//USwheatcropingrains

intmain(void)

(

doublecurrent,total;

intcount=1;

printf("squaregrainstotaln)；

printf("fractionof\nn);

printf("addedgrainsn);

printf("UStotal\nn);

total=current=1.0;//startwithonegrain

printf(n%4d%13.2e%12.2e%12.2e\nn,count,current,

total,total/CROP);

while(count<SQUARES)

(

count=count+1;

current=2.0*current;

//doublegrainsonnextsquare

total=total+current;//updatetotal

printf("%4d%13.2e%12.2e%12.2e\nn,count,current,

total,total/CROP);

)

printf("That1sall.\nH);

return0;

)

*/

///////////////////////////////////////////////

/*divide.c——divisionswehaveknown*/

/*

#include<stdio.h>

intmain(void)

printf("integerdivision:5/4is%d\nn,5/4);

printf("integerdivision:6/3is%d\n\6/3);

printf("integerdivision:7/4is%d\n\7/4);

printf(nintegerdivision:7/-4

7/-4);//print-1

printf("integerdivision:-7/4

-7/4);//print-1

printf("floatingdivision:7./4.is%1.2f\n”，7./4.)

printf("mixeddivision:7./4is%1.2f\n“，7./4);

printf(nmixeddivision:-7./4is%1.2f\nn,-7./4);/

print-1.75

printf("mixeddivision:7./-4is%1.2f\nH,7./-4)

//print-1.75

printf("mixeddivision:-7・/-4is%1.2f\nn,

-7・/-4);

return0;

)

*/

///////////////////////////////////////////////

//sizeof.c——usessizeofoperator

//usesC99%zmodifier一一try%uor%luifyoulack%zd

//%zdon11work

/*

#include<stdio.h>

intmain(void)

intn=0;

size_tintsize;

intsize=sizeof(int);

printf(nn=%d,nhas%ubytes;allintshave%ubytes.\nn,

n,sizeofnzintsize);

return0;

)

*/

///////////////////////////////////////////////

/*post_pre.c——postfixvsprefix*/

/*

#include<stdio.h>

intmain(void)

(

inta=1,b=1;

intaplus,plusb;

aplus=a++;

plusb=++b;

printf("aaplusbplusb\nn);

printf("%ld%5d%5d%5d\n"ra,aplus,b,plusb);//2

122

return0;

)

*/

///////////////////////////////////////////////

/*convert.c一一automatictypeconversions*/

/*

#include<stdio.h>

intmain(void)

(

charch;

inti;

floatfl;

fl=i=ch=1C1;

n

printf("ch=%c,i=%d,fl=%2.2f\n,chfi,fl);

ch=ch+1;

i=fl+2*ch;

fl=2.0*ch+i;

printf(nch=%c,i=%d,fl=%2.2f\nn,ch,i,fl);

ch=5212205.17;//print-

stillconfused

printf("Nowch=%c\nn,ch);

return0;

)*/

///////////////////////////////////////////////

/*pound.c一一definesafunctionwithanargument

/*

#include<stdio.h>

voidpound(intn);

intmain(void)

(

inttimes=5;

charch=1!1;//ASCIIcodeis33

floatf=6.0;

pound(times);

pound(ch);//charautomatically->int

pound((int)f);//castforcesf->int

return0;

)

voidpound(intn)

while(n——>0)

printf(n#n);

printf(n\nn);

)

*/

///////////////////////////////////////////////

///////////////////////////////////////////////

//chapter06C控制语句：循环

/*summing.c--sumsintegersenteredinteractively*/

/*

#include<stdio.h>

intmain(void)

(

longnum;

longsum=0L;

intstatus;

printf("Pleaseenteranintegertobesummedn);

printf(H(qtoquit):n);

status=scanf(n%ldn,&num);

while(status==1)//==means"isequalton

(

sum=sum+num;

printf("Pleaseenternextinteger(qtoquit):n);

status=scanf(n%ldn,&num);

)

n

printf("Thoseintegerssumto%ld.\nrsum);

return0;

)

*/

///////////////////////////////////////////////

/*t_and_f.c-一trueandfalsevaluesinC*/

/*

#include<stdio.h>

intmain(void)

(

inttrue_val,false_val;

true_val=(10>2);

false_val=(10==2);

printf("true=%d;false=%d\nn,true_val,false_val);

return0;

)

*/

///////////////////////////////////////////////

//boolean.c——usinga_Boolvariable

/*

#include<stdio.h>

intmain(void)

(

longnum;

longsum=OL;

intinput_is_good;

printf("Pleaseenteranintegertobesummedn);

printf(0(qtoquit):n);

input_is_good=(scanf(n%ldn,&num)==1);

while(input_is_good)

{

sum=sum+num;

printf("Pleaseenternextinteger(qtoquit):n);

n

input_is_good=(scanf(0%ldr&num)==1);

)

printf("Thoseintegerssumto%ld.\n",sum);

return0;

}

*/

///////////////////////////////////////////////

//sweetiel.c一一acountingloop

/*

#include<stdio.h>

intmain(void)

constintNUMBER=22;

intcount=1;//initialization

while(count<=NUMBER)//test

(

printf(nBemyValentine!\nn);//action

count++;

)

printf(nthetimeofloopis%d\nn,一一count);

return0;

)

*/

///////////////////////////////////////////////

//sweetie2.c一一acountingloopusingfor

/*

#include<stdio.h>

intmain(void)

(

constintNUMBER=22;

intcount;

for(count=1;count<=NUMBER;count++)

printf(nBemyValentine!\nn);

nn

printf(thetimeofloopIs%d\nr一一count);

return0;

)

*/

//////////////////////////////////////////////