C语言程序设计苏小红版第五六单元答案资料

1、第五章5.1#include<stdio.h>voidmain()(doublex;printf(“请输入一个实数:n");scanf(H%lf",&x);if(x>0)(printf("%fn”,x);)else(printf(,%fnK,-x);)5.2#inelude<stdio.h>main()(inta,b;printf(“请输入一个整数：")；scanf("%d",&a);b=a%2;if(b=O)(printf(*'%d为偶数n'a);)else(printf

2、(*'%d为奇数n'a);)5.3#include<stdio.h>#include<math.h>main()(floata,b,c,s,area;printf("请输入三边长：”)；scanf(n%f,%f,%f",&a,&b,&c);s=(a+b+c)/2;area=(float)sqrt(s*(s-a)*(s-b)*(s-c);if(a+b>c)&&(a+c>b)&&(b+c>a)(printf("这个三角形的面积为%fn'area);

3、)else(printf("这三条边不能组成三角形n*');)5.4#include<stdio.h>#include<math.h>voidmain()(doublea,b,c5d,e,x1,x2;printf("请输入a,b,c:");scanf("%lf,%lf,%ir,&a,&b,&c);if(a=0)(printf("该方程不是一元二次方程.n");)elseif(b*b-4*a*c>0)(d=sqrt(b*b-4*a*c);x仁(b+d)/(2*a);x2=(-

4、b-d)/(2*a);printf("x1=%f,x2=%fn",x1,x2);)elseif(b*b-4*a*c=0)x1=(-b)/(2*a);printf(Hx1=x2=%fnn,x1);)elseif(b*b-4*a*c<0)(printf("该方程没有实数解.n“);)5.5#include<stdio.h>main()(intyear,flag;printf("输入年份:“)；scanf("%dH,&year);if(year%4=0)&&(year%100!=0)|(year%400=0)

5、flag=1;)else(flag=O;)if(flag=1)(printf("d是闰年n",year);)else(printf("d不是闰年nH,year);)6.6#include<stdio.h>voidmain()(intyear,flag;printf("输入年份:“)；scanf("%du,&year);flag=(year%4=0)&&(year%100!=0)|(year%400=0)?1:2;if(flag=1)(printf(”d年是闰年n",year);)else(print

6、f(*'%d年不是闰年n",year);)5.7#include<stdio.h>main()(charch;printf("请输入一个字母:")；ch=getchar();if(ch>=65)&&(ch<=90)(ch=ch+32;printf(-c,%dn”,ch,ch);)elseif(ch>=97)&&(ch<=122)ch=ch-32;printf(-c,%dn”,ch,ch);)elseprintf(n%cnn5ch);5.8#include<stdio.h>mai

7、n()(charch;printf(“请输入一个字符：")；ch=getchar();if(ch>=48)&&(ch<=57)(printf("这是一个数字字符.n");)elseif(ch>=65)&&(ch<=90)(printf("这是一个大写字母.W);)elseif(ch>=97)&&(ch<=122)(printf("这是一个小写字母.n“)；)elseif(ch=32)(printf("这是一个空格字符.n“)；)else(printf(

8、"这是一个其它字符.W);)5.9#include<stdio.h>main()intscore,mark;printf(HPleaseenterscore:1');scanf(八d”,&score);if(score<0|score>100)(printf("lnputerror!*n*');)elseif(score>=90&&score<=100)printf("d-An”,score);)elseif(score>=80&&score<90)(print

9、f(”%d-Bn”,score);)elseif(score>=70&&score<80)(printf(”%d-Cn”,score);)elseif(score>=60&&score<70)(printf(n%d-Dn",score);else(printf("%d-En”,score);)5.10#include<stdio.h>#include<stdlib.h>main()(intflag,year,month,day,day仁31,day2=30,day3=29,day4=28;pri

10、ntf("请以2012,03这种形式输入某年某月：scanf("%d,%dH,&year,&month);if(month>12|month<1)printf("你输入的年份不在合法范围内n");exit(O);)else(flag=(year%4=0&&year%1OO!=O|year%400=0)?1:0;switch(flag)(case1:prints闰年)break;case0:printf(“平年”);break;)if(month=2&&flag=1)day=day3;elseif

11、(month=2&&flag=O)day=day4;switch(month)(case1:case3:case5:case 7:case 8:case10:case12:printf("%d年,d月拥有的天数是31.nM,year,month);break;case4:case6:case9:case11:printf("%d年,d月拥有的天数是30.n",year,month);break;default:printf(M%d年,d月拥有的天数是%d:nM,year,month,day);本章实验题1#include<stdio.h>

12、;main()doublefaheight,maheight;charsex,sports,diet,F,M,Y,N;printf("请输入父母的身高:n")；scanf("%lf,%lf",&faheight,&maheight);printf("请输入孩子是男孩还是女孩(F/M):n“)；scanty%c",&sex);printf("请输入孩子是否喜欢锻炼身体(Y/N):n“)；scanf(n%cH,&sports);printf("请输入孩子是否有良好的饮食习惯(Y/N):n

13、")；scanf(n%cH,&diet);if(sex=77&&sports=89&&diet=89)(printf(“该孩子成人时身高约为：%.2f.n",(faheight+maheight)*0.54*1.02*1.015)；)elseif(sex=77&&sports=89&&diet=78)(printf("该孩子成人时身高约为：%.2f.nM,(faheight+maheight)*0.54*1.02);)elseif(sex=77&&sports=78&&

14、amp;diet=89)(printf(“该孩子成人时身高约为：%.2f.nM,(faheight+maheight)*0.54*1.015);)elseif(sex=77&&sports=78&&diet=78)printf("该孩子成人时身高约为：%.2f.nn,(faheight+maheight)*0.54);elseif(sex=70&&sports=89&&diet=89)printf("该孩子成人时身高约为：%.2f.nH,(faheight*0.923+maheight)/2*1.02*1.01

15、5);elseif(sex=70&&sports=89&&diet=78)printf("该孩子成人时身高约为：%.2f.nH,(faheight*0.923+maheight)/2*1.02);)elseif(sex=70&&sports=78&&diet=89)(printf(“该孩子成人时身高约为:%.2f.nH,(faheight*0.923+maheight)/2*1.015)；)elseif(sex=70&&sports=78&&diet=78)(printf("该孩

16、子成人时身高约为:%.2f.n",(faheight*0.923+maheight)/2);)本章实验题2#include<stdio.h>main()(doublet,w,h;printf(”请输入体重身高:n”)；scanf("%lf,%lf",&w,&h);t=w/(h*h);if(t<18)(printf("低体重.H);)if(t>=18&&t<25)(printf("正常体重.n");)if(t>=25&&t<27)printf（&q

17、uot;超重体重.n"）;if(t>=27)printf(M肥胖.n”);)弟八早6.1 #include<stdio.h>main()(intij,k;charspace-'；for(i=1;iv=4;i+)(for(j=1;jv=i;j+)(printf("%c",space);)for(k=1;k<=6;k+)(prinprintfC'n")；)6.1(2)#include<stdio.h>main()(intk=4,n;for(n=0;n<k;n+)(if(n%2=0)continue;k

18、-；)printf("k=%dn,n=%dnu,k,n);6.1(3)#include<stdio.h>main()(intk=4,n;for(n=0;n<k;n+)(if(n%2=0)break;k-；)printf("k=%d,n=%dnH,k,n);)6.2(1)# include<stdio.h>main()(inti,sum=0;for(i=1;i<=101;i=i+2)(sum=sum+i;)printf("sum=%dnn,sum);)6.2(2)# include<stdio.h>main()(lon

19、gi;longterm,sum=0;for(i=1;i<=99;i=i+2)term=i*(i+1)*(i+2);sum=sum+term;)printf(nsum=%ldn",sum);)6.2(3)# include<stdio.h>main()(longterm=0,sum=0;inta,i,n;printf("lnputa,n:n)；scanf("%d,%d",&a,&n);for(i=1;i<=n;i+)(term=term*10+a;sum=sum+term;)printf(nsum=%ldnH,sum

20、);)6.2(4)#include<stdio.h>#include<math.h>main()(intn=1;floatterm=1.0,sign=1,sum=0;while(fabs(term)>=1e-4)(term=sign/n;sum=sum+term;sign=-sign;n+;)printf("sum=%fnu);)6.2(5)#include<stdio.h>#include<math.h>main()(intn=15count=1;floatx;doublesum,term;printf('1nputx:

21、u);scan&x);sum=x;term=x;doterm=-term*x*x/(n+1)*(n+2);sum=sum+term;n=n+2;count+;Jwhile(fabs(term)>=1e-5);printf("sin(x)=%f,coumt=%dn",sum,count);)6.3#include<stdio.h>main()(intx=1,find=0;while(!find)(if(x%2=1&&x%3=2&&x%5=4&&x%6=5&&x%7=0)(find=1;)

22、x+;)printf("x=%dnn,x-1);)6.4#include<stdio.h>main()(inti,n;longpj;printf("Pleaseentern:");scanf(n%d",&n);for(i=1;i<=n;i+)(P=i*i；j=i*i*i;printf("%d*%d=%ldn",i,i,p);printf(H%d*%d*%d=%ldn,',i,i,i,j);6.5#include<stdio.h>main()(doubleC,F,i;for(F=-40;F&

23、lt;=110;F=F+10)C=%fn"EC);C=(F-32)*5/9;printf(T=%f)6.6#include<stdio.h>main()(doublep=1+0.01875*12,x4,x3,x2,benjin;x4=1000/p;x3=(x4+1000)/p;x2=(x3+1000)/p;benjin=(x2+1000)/p;printf("本金为:%f",benjin);)6.7#include<stdio.h>main()(doublecount=0,c,d5sum=100;printf('1nputcscan

24、f("%lf",&c);d=c/100.0;dosum=sum*(1+d);count+;while(sum<=200);printf("count=%fnn,count);6.8#include<stdio.h>#include<math.h>main()(intcount=1;doublesum=1.0,term,n=3.0J=1.0;doterm=-i/n;sum=sum+term;n=n+2;I=-I;count+;while(fabs(term)>=1e-5);printf(Hn=%lf,count=%d.n&

25、quot;,4*sum,count);6.9# include<stdio.h># inelude<math.h>main()(intcount=1;doublesum=1.0,term=1.0,n=1.0;while(fabs(term)>=1e-5)(term=term/n;sum=sum+term;n+;count+;)printf(He=%lf,count=%d.nfl,sum5count);)6.10# include<stdio.h>main()(inti,a,b,c5d;for(i=100;i<=999;i+)(a=i/100;c=

26、i%10;b=(i-a*100-c)/10;d=a*a*a+b*b*b+c*c*c;if(i=d)(printf('1=%dn",i);)6.11#include<stdio.h>main()longm=2,n,term=1,sum=1;printf(Hlnputn:H);scanf("%ld",&n);doterm=term*m;sum=sum+term;m+;while(sum<=n);printf("m=%d.n”,m-2);)6.12#include<stdio.h>main()(intnum=1,s

27、um=0,count=0;while(num>0)(printf('1nputnum:")；scanf(n%d",&num);sum=sum+num;count+;)printf("sum=%d,count=%d.nH,sum,count-1);6.13# include<stdio.h>main()(intterm,sum=0,count=0;dobegin:printf('1nputterm:")；scant(n%d",&term);if(term>0)(sum=sum+term;co

28、unt+;)elseif(term<0)gotobegin;elsegotoend;Jwhile(term!=0);end:printf(Hsum=%d.count=%d.nlsum,count);)6.14# include<stdio.h>main()(inta,b,c;for(a=0;a<17;a+)for(b=0;b<=25;b+)(c=30-a-b;if(a*3+b*2+c=50)printf("男=%"女=%"孩子=%d.n",a,b,c);)6.15# include<stdio.h>main()(

29、inta,b;for(a=0;a<=98;a+)b=98-a;67孑蛊丹*ncludAsfdp-hv6-8ma-n()一三XXNfor(XH一八Xfor(yHy二(XAIo八X+A20八y+10+y5+zHuI00)-f(apz.nff*4Hu386)n由血QdJn云-66*ncludAsfd-O.hvmain。-一NFXMNfor(XHoXAH2oX+)-for(yHol<AH33P+)-zJoo-x-y八二(5*x+3*y+z、30HH-oo一-Dz.nff(=XH%dlyH%dN上：#include<stdio.h>main()(inti,j;for(i=1;i&

30、lt;=9;i+)(for(j=1;jv=9;j+)(printf(',%-5d',i*j);)printf("n")；)左：#include<stdio.h>main()(inti,j;for(i=1;i<=9;i+)(for(j=1;j<=i;j+)(printf(',%-5d',i*j);)printf("n")；)右：#include<stdio.h>main()(inti,j,a=1,k;charb='*;for(i=1;i<=9;i+)for(k=1;k<

31、=i;k+)for(j=i;j<=9;j+)(a=j*i；printf(n%5d",a);)printf("n")；)6.19#include<stdio.h>main()(longi,summo;doublesumfu=0,term=0.01;summo=100000*30;for(i=1;i<=30;i+)(term=term*2.0;sumfu=sumfu+term;)printf("陌生人付ld,富翁付%lf.nH,summo,sumfu);)本章实验题2.1#include<stdio.h>#include<stdlib.h>#include<time.h>main()(intx1,x2,c,answer;begin:s