華中科技大學標準C語言程序設計及應用習題答案

1、.第二章一.選擇題1.c 2.b d 3.a 4.a 5. d 6.c 7.d 8.c 9.a 10.d11.b 12.d 13.c 14.d 15.a16.b 17.a 18.b 100011 001111二.判斷題1.錯2.錯3.錯4.錯三.填空題1. b 662. n1=%dnn2=%dn3. 0四.計算1(1) x|y = 0x002f(2) xy = 0x0026(3) x&y = 0x0009;(4) x+y = 0xffc6(5) x=4 0x00022(1) 6(2) 50(3) 1(4) 16(5) 1(6) 203(1) 0(2) 1(3) 1(4) 4(5) 8(6) 1

2、4(1) 12(2) 0(3) 1(4) 27精品.(5) 1(6) 6(7) 24(8) 27(9) 295(1) 0(2) 1(3) 1(4) 3(5) 2五.程序分析題程序1b=20 a=3600 程序2第三章一.填空題1.s=62.963.(1) scanf(%c,&c); (2) c-32 更好的答案：c-(a-a)2.1 main()int a,b;printf(please input a & b:);scanf(%d%d,&a,&b);printf(nmax is %dn,(ab)?a:b);2.2int max(int x,int y);main()int a,b,c,max

3、;printf(please input a & b & c:);scanf(%d%d%d,&a,&b,&c);max=ab?a:b;max=cmax?c:max;printf(nmax is %dn,max);精品.2.3main() int i=0,sum=0; while(i=100) sum+=i; i+; printf(1+2+3+.+100=%dn,sum);2.4main() int i; int a=10,b=-3; int c; printf(%6d%6d,a,b); for(i=2;i10;i+) c=3*b+a; printf(%6d,c); a=b; b=c; prin

4、tf(n);2.5main() int i; while(1) printf(please input a data(0:exit):); scanf(%d,&i); if(i=0) break; if(i%2=0) printf(the data %d is a even number.n,i); else printf(the data %d is a odd number.n,i); 2.6精品.#include main() int i; int a=8,b=1; int sum=0; for(i=0;i10;i+) b+=3; sum += a; a+=b; printf(a%8d

5、b:%8dn,a,b); printf(the sum of is:%dn,sum);2.7#include main() float x,y; printf(please input x:); scanf(%f,&x); if(x1.0) y=x; else if(x10) y=2*x-1; else y=3*x-11; printf(y=%fn,y);2.8#include main() long a,i,b,a1; while(1) printf(please input data(1-99999):); scanf(%ld,&a); printf(a:%ldn,a); if(a=100

6、000) break; i=0;精品. a1=0; while(a!=0) b=a%10; printf(%8d,b); a/=10; i+; a1=a1*10+b; printf(n i:%ld a1:%ldn,i,a1); 2.9#include #include #include main() int a,b,i,k=0; randomize(); a=random(1001);/*create a random data(0-1000)*/ for(i=0;ib) k+; printf(n%d:smaller,guess again!n,k); else if(ab) k+; prin

7、tf(n%d:bigger,guess again!n,k); else printf(nyou guess right,congraturation!) ; printf(nyou have guessed %d times,k); break; 精品. if(k=20) printf(nsorry,you failed!);2.10#include main() int a,b,c; int num; for(a=0;a10;a+) for(b=0;b10;b+) for(c=1;c10;c+) num=a*100+b*10+c;if(num%3=0)&(a=5|b=5|c=5) prin

8、tf(%8d,num); printf(nnn);2.11#include main() int i; int a,b; printf(please input a,b:); scanf(%d%d,&a,&b); for(i=a0;i-) if(a%i=0&b%i=0) printf(the max=%d,i); break; for(i=ab?a:b;i0;i+) if(i%a=0&i%b=0)精品. printf(nthe min=%d,i); break; 2.12#include main() int a,k=0; printf(please input data:); scanf(%

9、d,&a); while(a%2=0) a=a/2; k+; printf(nthe number of factor(2) is %d,k);2.13main() long i,t=1; long sum=0; for(i=1;i=10;i+) t*=i; sum+=t; printf(%ld!=%ldn,i,t); printf(sum:%ldn,sum); 2.14#include void main() int i,x=0; for(i=9;i=1;i-) x=2*(x+1); 精品. printf(the first day:%d,x);2.15#include #define pi

10、 3.141593main() float r,h; float v; printf(please input r,h:); scanf(%f%f,&r,&h); v=1.0/3*pi*r*r*h; printf(v=%.2f,v);2.16#include#includemain() long int sn=0; long int m=0,t=0; int a,n,i; printf(please input a n:); scanf(%d%d,&a,&n); for(i=0;in;i+) m=m*10+a; sn+=m; printf(a+aa+aaa+.+aa.a=%ldnn,sn);2

11、.17#include main() int k; printf(please input k:); do scanf(%d,&k); if(k=0&k=6)精品. break; while(1); switch(k) case 0:printf(sunday.n);break; case 1:printf(monday.n);break; case 2:printf(tuesday.n);break; case 3:printf(wednesday.n);break; case 4:printf(thursday.n);break; case 5:printf(friday.n);break

12、; case 6:printf(saturday.n);break; 2.18#include main() int i; double x,a,b=1,sum=1; printf(please input x:); scanf(%lf,&x); a=x; for(i=1;a/b=1e-6;i+) sum=sum+a/b; a=a*x; b=(i+1)*b; printf(nsum=%lf,sum);2.19#include #include main() float a,x1,x2; printf(input a:); scanf(%f,&a); x1=1.0; while(1) 精品. x

13、2=1.0/2*(x1+a/x1); if(fabs(x2-x1)1e-5) break; x1=x2; printf(sqrt(a)=%f,x2);第四章寫出下列程序輸出結果1.no 1 a=1no 1 a=0no 1 a=1no 1 a=02.a=0 b=0 c=0a=1 b=0 c=0a=2 b=0 c=03.main:x=5,y=1,n=1func:x=6,y=21,n=11main:x=5,y=1,n=11func:x=8,y=31,n=21第五章1.d2.d3.c4.65.cdabc6.(1)j+=2 (2)ai=0&si=912. (1)0 (2)str1i-str2i5.1#i

14、ncludeint fun();int fun()精品. int a33,sum; int i,j; sum=0;/*error*/ for(i=0;i3;i+) for(j=0;j3;j+) scanf(%d,&aij);/*error*/ for(i=0;i3;i+) sum=sum+aii; printf(sum=%dn,sum);void main() fun();5.2#include void main( void ) float num10; float input,getnum11; int i,j; float a=6;for(i=0; i10; i+) numi=a; a=

15、a+7.5;loop1: printf(please input a number(0-80) input=); scanf(%f,&input);if(input70)=1)goto loop1;for(i=0; i10; i+ )精品.if(inputnumi)goto loop2;loop2: for(j=0; ji; j+ ) getnumj=numj;getnumj=input;for(j=i; j=10; j+,i+)getnumj+1=numi;for(j=0; j11; j+ )printf(%3.3f ,getnumj);5.3#include stdio.h#include

16、 stdlib.hmain()int a1,a2,a3,a4,a5,a6,a7,a8,a9;int a3;int i;for(;)for (i=0;i3;i+)ai=rand()%3;while(a0!=a1) & (a0!=a2) & (a1!=a2)/*get three different numbers 0,1,2*/a1=a0+1;/*divide 19 into three groups,a1a3,a4a6,a7a9*/a2=a1+1;a3=a2+1;a4=a1+3;a5=a2+3;a6=a3+3;a7=a1+6;a8=a2+6;a9=a3+6;/* make sure that

17、each line and each row is made up with three members in different group.*/精品./* such as: a9 a1 a5 a2 a6 a7 a4 a8 a3 */if(a1+a5+a9) = (a2+a6+a7) & (a1+a5+a9) = (a3+a4+a8)& (a1+a6+a8) = (a5+a7+a3) & (a1+a5+a9) = (a2+a4+a9)printf(%d %d %dn%d %d %dn%d %d %dn,a9,a1,a5,a2,a6,a7,a4,a8,a3);return;5.4#includ

18、e void main(void)char input1100,input2100,input3100;int i,eng=0,eng=0,num=0,blank=0,other=0;printf(input 3 rows of character,each row dont exceed 80 characters:n);gets(input1); printf(the second row:n); gets(input2); printf(the third row:n); gets(input3);/*test the first row*/for(i=0; i100; i+) if(i

19、nput1i=0) goto loop1; else if(a=input1i)&(input1i=z)=1)eng+; else if(a=input1i)&(input1i=z)=1) eng+; else if(0=input1i)&(input1i=9)=1)num+; else if(input1i=32)精品.blank+; else other+;/*test the second row*/loop1:for(i=0; i100; i+) if(input2i=0) goto loop2; else if(a=input2i)&(input2i=z)=1)eng+; else

20、if(a=input2i)&(input2i=z)=1) eng+; else if(0=input2i)&(input2i=9)=1)num+; else if(input2i=32)blank+; else other+;/*test the third row*/loop2:for(i=0; i100; i+) if(input3i=0) goto loop3; else if(a=input3i)&(input3i=z)=1)eng+; else if(a=input3i)&(input3i=z)=1) eng+; else if(0=input3i)&(input3i=9)=1)nu

21、m+; else if(input3i=32)blank+; else other+;loop3: printf(upper english character:%dnlower english character:%dnnumber:%dnblank:%dnother characters:%dn,eng,eng,num,blank,other);5.5#include 精品.void main(void)char str180,str240;int i,j,k;/*input two string*/printf(please input the first stringn str1=);

22、gets(str1);printf(please input the second stringn str2=);gets(str2);/*get the end of str1*/for(i=0; i80; i+)if(str1i=0) break;/*copy str2 to str1*/ for(j=i,k=0; str2k!=0;k+,j+) str1j=str2k; str1i+k=0; puts(str1);5.6#include struct student char name20; int score;stu5,stu1;void main(void) int i,j;prin

23、tf(input students score and name(5),seperate using the character of , :n);for(i=0; i5; i+) scanf(%d,%s,&stui.score,&);/*sorting*/for(i=0; i5; i+) for(j=0; jstuj+1.score)精品. stu1=stuj;stuj=stuj+1;stuj+1=stu1;printf(after sotred,score and name:n); for(i=0; i5; i+)printf(%d,%sn,stui.score,stui

24、.name);5.7#includemain() int a33,i,j,m,n,o,p; printf(please input a 3*3 shuzu:n); for (i=0;i=2;i+) for (j=0;j=2;j+) scanf(%d,&aij); for (i=0;iai1)? ai0:ai1; n=(mai2)? m: ai2; for (j=0;j=2;j+) o=(a0ja1j)? a0j:a1j; p=(oa2j)? o: a2j; 精品. if (n=p) printf(andian is %dn,p); else printf(there is no andian.

25、n);5.8#include void main(void) int a43,b34,i,j; for(i=0; i4; i+) for(j=0; j3; j+) scanf(%d,&aij); for(i=0; i4; i+) printf(n); for(j=0; j3; j+) printf(%5d ,aij); for(i=0; i4; i+) for(j=0; j3; j+) bji=aij; printf(n);for(i=0; i3; i+) printf(n); for(j=0; j4; j+) printf(%5d ,bij); 精品.5.9#include #include

26、void main(void) char str6; int i,j=0,m=0,n=0; gets(str); while(strj!=0) j+; for(i=j-1;i=0;i-) m=(stri-0)*(pow(8,j-i-1); n+=m; printf(shijinzhi %d,n);5.10#include void main(void)char input1100;int i,num=0,blank=0;printf(please input a row character:n);gets(input1);/*test the first row*/for(i=0; i100;

27、 i+) if(input1i=0) goto loop;精品. else if(a=input1i)&(input1i=z)=1)num+; else if(a=input1i)&(input1i=z)=1) num+; else if (input1i=32)blank+;loop: printf(character:%dnblank:%dn,num,blank);第六章一、 選擇題1.d：p中記錄的是a的地址，*p訪問地址a的值2.d ：指針數組3.d：指針可以進行是否相等判斷，空指針可以進行指針變量初始化，指針可以偏移；4.c：5.c、d：a5不存在，若*&a4則正確；c,d正確；6.

28、d：7.b：8.b：二、 填空題1*(p+3)2222 cdefgbcdefgabcdefg73 6385三、 程序分析題1p = s0 ； 錯誤，應改為：p = s； 或 p = &s0；2int x , *p；錯誤，應改為：double x, *p；3*p = x ；錯誤，應改為：p = &x ；4 聲明順序錯誤；應該改為：void main(void) int a; int *p = &a; a = 10; printf(“%dn”,*p);精品.2.3 #include #include main() char ch25 = 6937,8254,*p2; int i,j,s=0; fo

29、r(i=0;i2;i+) pi = chi; for(i=0;i0;j+=2) s = 10*s + pij - 0; printf(%dn,s);4.1#include #include main() int count = 0; char str1100,str2100; char *p1,*p2; printf(please enter string 1:); gets(str1); printf(please enter string 2:); gets(str2); printf(str1:%sn,str1); printf(str2:%sn,str2); p1 = str1; p2

30、 = str2; while(*p1!=0&*p2!=0) if(*p1+=*p2+) count+; printf(count:%dn,count);4.2#include #include 精品.main() int i,j,k; int a3; int temp; printf(please enter array a3:); scanf(%d%d%d,&a0,&a1,&a2); for(i=0;i2;i+) k = i; for(j= i+1;j3;j+) if(ajai)k = j; if(k!=i) temp = ai; ai = ak; ak = temp; for(i=0;i3

31、;i+) printf(%dt,ai); printf(n);4.3#include #include #define n 100main() char s1n, s2n,*p; int m; printf(please enter string1:); gets(s1); p = s1; printf(enter m:); scanf(%d,&m); strcpy(s2,p+m);精品. printf(string2:%sn,s2);4.4#include #include main() char s100=iuiui012asdd90k890y098kkkk1234,*p; char da

32、ta100100=0; int count=0; int i; p = s;/* printf(please enter a string:); gets(p);*/ printf(sssss:%sn,s); while(*p!=0) i=0; while(*p=0&*p=9) datacounti = *p; i+; p+; if(i!=0) count+; p+; printf(count:%dn,count); for(i=0;icount;i+) printf(%sn,datai);4.5#include #define size 4精品.main() int datasizesize

33、,i,j,d; int max,m=0,n=0; for(i=0;isize;i+) for(j=0;jsize;j+) scanf(%d,&dataij); for(i=0;isize;i+) for(j=i+1;jsize;j+) d = dataij; dataij = dataji; dataji = d; max = data00; for(i=0;isize;i+) printf(n); for(j=0;j=max) max = dataij;m = i;n = j; printf(nmax:%4d m:%d n:%dn,max,m,n);4.6#include 精品.#inclu

34、de main() char *p = test,capital,index,large,small; char *pstr = p; int a,b,n = 5; char *temp; for(a=0;an-1;a+) for(b=a+1;b0) temp = pstra;pstra = pstrb;pstrb = temp; for(a=0;an;a+) printf(%sn,pstra);4.7#include #include main() char s100,temp; char *p = s; int i,length; printf(please enter a string:

35、 ); gets(s); while(*p+!=0); length = p - s -1; printf(string length:%dn,length); for(i=0;ilength/2;i+)精品. temp = si; si = slength-i-1; slength-i-1 = temp; printf(%sn,s);第七章一，選擇題1.a2.d3.b4.d5.c6.a7.b二.程序填空題1. (1) ak (2) ak (3) ak2. (1) ai (2) j (3) i+1或6三.改錯題1.#include#includevoid swap(char *,char *)

36、;/*此處有錯誤，函數聲明時要加分號*/main() char a80,b80,c80; scanf(%s%s%s,a,b,c);/*此處有錯誤，a,b,c分別為數組a80,b8,c80的首地址*/ if(strcmp(a,b)0) swap(a,b);/*此處有錯誤，字符串比較應該使用strcmp函數*/ if(strcmp(b,c)0) swap(b,c);/*此處有錯誤，原因同上*/ if(strcmp(a,b)0) swap(a,b);/*原算法不能實現排序，需要添加此語句*/ printf(%sn%sn%sn,a,b,c);7.3.1#include #include void sw

37、ap(char *pstr1,char *pstr2) char p80;精品. strcpy(p,pstr1); strcpy(pstr1,pstr2); strcpy(pstr2,p);main() char a80=ccc,b80=bbb,c80=aaa;/* scanf(%s%s%s,a,b,c); */ if(strcmp(a,b)0) swap(a,b); if(strcmp(b,c)0) swap(b,c); if(strcmp(a,b)0) swap(a,b); printf(%sn%sn%snnn,a,b,c);7.4.1#include int squsum(int,int);main() int a,b; int c; printf(enter 2 integer:); scanf(%d%d,&a,&b); c = squsum(a,b); printf(a=%d b:%d a2+b2=%dn,a,b,c);int squsum(int x,int y) int z; z = x*x+y*y;