《C语言程序设计》苏小红课后习题答案高等教育出社文档格式.docx
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printf（a=%d%,b=%d%n,a,b）;
4.1（3）#includemain（）inta,b;
scanf（%2d%*2s%2d,&
b）;
printf（%d,%dn,a,b）;
4.2#includemain（）longa,b;
floatx,y;
scanf（%d,%dn,&
scanf（%f,%fn,&
x,&
y）;
printf（a=%d,b=%dn,a,b）;
printf（x=%f,b=%fn,x,y）;
5.1#includemain（）floata;
printf（Inputa:
scanf（%f,&
a）;
if（a=0）a=a;
printf（a=%fn,a）;
elsea=-a;
5.2#includemain（）inta;
if（a%2=0）printf（a是偶数）;
elseprintf（a是奇数）;
5.3#include#includemain（）floata,b,c,s,area;
if（a+bc&
a+cb&
b+ca）s=（a+b+c）/2;
area=（float）sqrt（s*（s-a）*（s-b）*（s-c）;
printf（area=%fn,area）;
elseprintf（不是三角形）;
5.4#include#includemain（）floata,b,c,x,y;
printf（Inputa,b,c:
scanf（%f,%f,%f,&
if（a=0）printf（该方程不是一元二次方程n）;
if（b*b-4*a*c0）x=（-b+sqrt（b*b-4*a*c）/（2*a）;
elseif（b*b-4*a*c=0）x=-b/（2*a）;
y=-b/（2*a）;
elseprintf（该方程无实根n）;
5.5#includemain（）intyear,flag;
printf（Inputayear:
year）;
if（year%4=0&
year%400!
=0|year%400=0）flag=1;
elseflag=0;
if（flag=1）printf（%disaleapyear!
n,year）;
elseprintf（%disnotaleapyear!
5.6#includemain（）intyear,flag;
flag=year%400=0|year%4=0&
year%100!
=01:
0;
if（flag=1&
flag!
=0）printf（%disaleapyear!
5.7#includemain（）charch;
printf（Inputch:
scanf（%c,&
ch）;
if（ch=a&
ch=A&
ch=Z）ch=getchar（）;
ch=ch+32;
printf（%c,%dn,ch,ch）;
elseprintf（%c,ch）;
5.8#includemain（）charch;
if（ch=48&
ch=65&
ch=97&
ch=122）printf（ch是小写字母n）;
elseif（ch=32）printf（ch是空格n）;
elseprintf（ch是其他字符n）;
5.9#includemain（）intscore,grade;
printf（Inputscore:
score）;
grade=score/10;
if（score100）printf（Inputerrorn）;
if（score=90&
score=80&
score=70&
score=60&
score=0&
score60）printf（%d-En,score）;
5.10#includemain（）intyear,month;
printf（Inputyear,month:
scanf（%d,%d,&
year,&
month）;
if（month12|month=0）printf（errormonthn）;
elseswitch（year,month）case12:
case10:
case8:
case7:
case5:
case3:
case1:
printf（31天n）;
break;
case11:
case9:
case6:
case4:
printf（30天n）;
case2:
year!
=0|year%400=0）printf（29天n）;
elseprintf（28天n）;
default:
printf（Inputerrorn）;
6.1
（1）#includemain（）inti,j,k;
charspace=;
for（i=1;
i=4;
i+）for（j=1;
j=i;
j+）printf（%c,space）;
for（k=1;
k=6;
k+）printf（*）;
printf（n）;
6.1
（2）#includemain（）intk=4,n;
for（n=0;
nk;
n+）if（n%2=0）continue;
k-;
printf（k=%dn,n=%dn,k,n）;
6.1（3）#includemain（）intk=4,n;
n+）if（n%2=0）break;
printf（k=%d,n=%dn,k,n）;
6.2
（1）#includemain（）inti,sum=0;
i=101;
i+）sum=sum+i;
printf（sum=%dn,sum）;
6.2
（2）#includemain（）longi;
longterm,sum=0;
i=i+2）term=i*（i+1）*（i+2）;
sum=sum+term;
printf（sum=%ldn,sum）;
6.2（4）#include#includemain（）intn=1;
floatterm=1.0,sign=1,sum=0;
while（term=1e-4）term=1.0/sign;
sign=sign+n;
n+;
printf（sum=%fn,sum）;
6.2（5）#include#includemain（）intn=1,count=1;
floatx;
doublesum,term;
printf（Inputx:
sum=x;
term=x;
doterm=-term*x*x/（n+1）*（n+2）;
n=n+2;
count+;
while（fabs（term）=1e-5）;
printf（sin（x）=%f,count=%dn,sum,count）;
6.3#includemain（）intx=1,find=0;
while（!
find）if（x%2=1&
x%3=2&
x%5=4&
x%6=5&
x%7=0）printf（x=%dn,x）;
find=1;
x+;
/*intx,find=0;
for（x=1;
!
find;
x+）if（x%2=1&
*/6.4#includemain（）inti,n;
longp=1,m=1;
printf（Inputn:
n）;
i=n;
i+）p=i*i;
m=i*i*i;
printf（p=%d,m=%dn,i,p,i,m）;
6.5#includemain（）floatc,f;
for（c=-40;
c=110;
c=c+10）f=9/5*c+32;
printf（f=%fn,f）;
6.6#include#includemain（）intn;
doublec=0.01875,x;
dox=x*pow（1+c,12）-1000;
while（x0）;
printf（x=%dn,x）;
6.7#includemain（）intn=0;
floata=100.0,c;
printf（Inputc:
doa=a*（1+c）;
while（a=200）;
printf（n=%dn,n）;
6.8#include#includemain（）intn=1,count=1;
doublesum=1,term=1;
while（fabs（term）=1e-5）term=pow（-1,count）*（1.0/（n+2）;
sum=4*sum;
printf（sum=%f,count=%dn,sum,count）;
6.9#include#includemain（）intn=1,count=1;
while（fabs（term）=1e-5）term=term*（1.0/n）;
6.10#include#includemain（）intx;
for（x=100;
x=999;
x+）if（x=pow（x/100,3）+pow（x/10%10,3）+pow（x%10,3）printf（x=%dn,x）;
6.11#includemain（）inti=0,n;
longsum=0,term=1;
printf（Inputn:
doi+;
term=term*i;
while（sumn）;
printf（%dn,i-1）;
6.12#includemain（）inti,n,m,count=0,sum=0;
i0）sum=sum+m;
elsebreak;
printf（sum=%d,count=%dn,sum,count）;
6.13#includemain（）inti,n,m,count=0,sum=0;
i0|m0）sum=sum+m;
6.14#includemain（）intx,y,z;
for（x=0;
x=17;
x+）for（y=0;
y=25;
y+）3*x+2*y+z=50;
z=30-x-y;
if（3*x+2*y+z=50&
x+y+z=30）printf（x=%d,y=%d,z=%dn,x,y,z）;
6.15#includemain（）intx,y;
x=98;
x+）y=98-x;
2*x+4*y=386;
if（x+y=98&
2*x+4*y=386）printf（x=%d,y=%dn,x,y）;
6.16#includemain（）intx,y,z;
x=20;
y=33;
y+）3*y+5*x+z/3.0=100;
z=100-x-y;
if（5*x+3*y+z/3.0=100&
z+x+y=100）printf（x=%d,y=%d,z=%dn,x,y,z）;
6.17#includemain（）intx,y,z;
x=9;
x+）for（y=1;
y0）printf（x=%d,y=%d,z=%dn,x,y,z）;
7.1#includeintSquare（inti）returni*i;
intmain（）inti=0;
i=Square（i）;
for（;
i3;
i+）staticinti=1;
i+=Square（i）;
printf（%d,i）;
printf（%dn,i）;
return0;
7.2#includeinthour,minute,second;
voidupdate（）second+;
if（second=60）second=0;
minute+;
if（minute=60）minute=0;
hour+;
if（hour=24）hour=0;
voiddisplay（）printf（%d,%d,%dn,hour,minute,second）;
voiddelay（）intt;
intmain（）inti;
voidupdaye（）,display（）,delay（）;
for（i=0;
i1000000;
i+）update（）;
display（）;
delay（）;
7.3#includeintGetMax（inta,intb）;
intmain（）intx,y,max;
printf（Inputx,y:
max=GetMax（x,y）;
printf（max=%dn,max）;
intGetMax（intm,intn）if（m=n）returnm;
elsereturnn;
7.4#includeintLCM（intn,intm）;
intmain（）inta,b;
printf（Inputa,b:
printf（%dn,LCM（a,b）;
intLCM（intn,intm）intx;
intfind=0;
x+）if（x%n=0&
x%m=0）find=1;
returnx-1;
7.5#includelongFact（intn）;
intmain（）intm,a;
printf（Inputm:
m）;
for（a=1;
a=m;
a+）printf（%d!
=%ldn,a,Fact（a）;
longFact（intn）inti;
longresult=1;
for（i=2;
i+）result*=i;
returnresult;
7.6#includelongFact（intn）;
intmain（）intm;
longret;
ret=Fact（m）;
printf（ret=%dn,ret）;
longresult=1,sum=0;
sum=sum+result;
returnsum;
7.7
（1）#includeintGcd（inta,intb）;
intmain（）intm,n;
printf（Inputm,n:
m,&
printf（%dn,Gcd（m,n）;
intGcd（inta,intb）intt,min,find=0;
min=aba:
b;
t=min;
for（t=min;
t-）a%t=0;
b%t=0;
if（a%t=0&
b%t=0）returnt;
7.7
（2）#includeintGcd（inta,intb）;
intGcd（inta,intb）intr,temp;
r=a%b;
if（r=0）returnb;
elsedotemp=b;
b=r;
a=temp;
while（r!
=0）;
returnb;
8.1
（1）#includevoidFunc（intx）x=2;
intmain（）intx=10;
Func（x）;
printf（%d,x）;
8.1
（2）#includevoidFunc（intb）intj;
for（j=0;
j4;
j+）bj=j;
intmain（）staticinta=5,6,7,8,i;
Func（a）;
i4;
i+）printf（%d,ai）;
8.2
（1）intPositiveNum（inta,intn）inti,count=0;
i0）count+;
8.2
（2）voidFib（longf,longn）inti;
f0=0;
f1=1;
in;
i+）fi=fi-1+fi-2;
8.2（3）#includeintmain（）inta10,n,max,min,maxPos,minPos;
n10;
n+）scanf（%d,&
an）;
max=min=a0;
maxPos=minPos=0;
nmax）max=an;
maxPos=n;
elseif（anmin）min=an;
minPos=n;
printf（max=%d,pos=%dn,max,maxPos）;
printf（min=%d,pos=%dn,min,minPos）;
8.3voidDivArray（int*pArray,intn）inti;
i+）pArrayi/=pAttay0;
8.4#include#defineN40intFailNum（intscore,intn）;
voidReadScore（intscore,intn）;
intmain（）intscoreN,n;
ReadScore（score,n）;
FailNum（score,n）;
printf（FailNumstudentsare%dn,FailNum（score,n）;
intFailNum（intscore,intn）inti,count=0;
i+）if（scorei60）count+;
returncount;
voidReadScore（intscore,intn）inti;
i+）scanf（%d,&
scorei）;
8.5#include#defineN40intHighAver（intscore,intn）;
intReadScore（intscore）;
n=ReadScore（score）;
printf（HighAverstudentsare%dn,HighAver（score,n）;
intHighAver（intscore,intn）inti,count=0,sum=0,aver;
i+）sum=sum+scorei;
aver=sum/n;
iaver）count+;
intReadScore（intscore）inti=-1;
while（scorei=0）;
returni;
8.6#include#defineN40intReadScore（intscore,longnum）;
intFindMax（intscore,longnum,intn）;
intmain（）intscoreN,n,max,num,t;
longnumN;
t=FindMax（score,n）;
max=scoret;
num=numt;
printf（max=%d,num=%dn,max,num）;
intReadScore（intscore,longnum）inti=-1;
printf（InputstudentsIDandscore:
scanf（%ld%d,&
numi,&
while（numi0&
scorei=0）;
intFindMax（intscore,longnum,intn）intmax,i;
max=score0;
imax）max=scorei;
8.7#include#defineN40intRead（inta）;
intChangeArry（inta,intn）;
intmain（）intaN,n;
printf（%dn,ChangeArry（a,n）;
intRead（inta）inti;
i9;
i+）printf（Inputa:
ai）;
intChangeArry（inta,intn）intmax,min,i,maxpos,minpos,term;
max=min=score0;
maxpos=n;
else（aimin）min=ai;
minpos=n
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