C语言程序设计习题解答

1、精选优质文档-倾情为你奉上C语言程序设计习题解答沈国荣 隋雪莉 闵芳目录第1章 C语言程序设计概述一、选择题12345678910CBACCBDBDA二、填空题1.函数、main()函数2./*、*/3.C、.OBJ、.EXE4.顺序结构、选择结构、循环结构三、编程题1.【参考代码】#include<stdio.h>int main( )printf( "（学校名称）n" ) ;printf( "（姓名）n" ) ;return 0 ;2.【参考代码】#include<stdio.h>int main( )printf( &quo

2、t;（学校名称）n（姓名）n" ) ;return 0 ;第2章 数据类型及其运算一、选择题12345678910CCCABADDC、BB11121314151617181920CADDDCDC注：第5题B选项为：''' '017' 't'二、填空题1.字母、数字、下划线2.1、4、4、83.-6.97.68.-609.y%2=110.1、0、1三、程序阅读题1.b2.03.04.10,25.9,10,9,106.3,1,0,07.3,20,30,1第3章 语句与输入输出一、选择题12345678910BCC

3、CCBBBDA二、填空题1.123.472.D3.回车4.10,2三、程序阅读题1.2612.203.201,104.y=4630y=46305.*3.,3.142*6.c:dec=120,oct=170,hex=78,ASCII=x7.x=1 y=2 *sum*=310 squared is : 1008.2 48 20.2 20.29.x+y+z=4810.55, ,A四、编程题1.【参考代码】#include<stdio.h>int main( )char ch;printf("请输入一个字符：n");scanf("%c",&c

4、h);printf("%c的ASCII码为：%dn", ch,ch);return 0 ;2.【参考代码】#include<stdio.h>#define PI 3.1416int main( )double r, h;double cl,cs,cv;printf("请输入圆的半径：");scanf("%lf", &r);printf("请输入圆柱高：");scanf("%lf", &h);cl=2*PI*r;cs=PI*r*r;cv=PI*r*r*h;printf(

5、"圆的周长为：%.4lfn", cl);printf("圆的面积为：%.4lfn", cs);printf("圆柱的体积为：%.4lfn", cv);return 0 ;3.【参考代码】#include<stdio.h>int main( ) int splitInt,one,ten,hundred;printf("输入要处理的整数："); scanf("%d",&splitInt); hundred = splitInt/100;ten = splitInt%100/10;

6、one = splitInt%10;printf("个位:%d，十位:%d，百位:%dn",one,ten,hundred);return 0 ;第4章 选择结构程序设计一、选择题123456DCCBBC二、程序阅读题1.102.2,2,23.64.97,b5.c=-16.88887.20,08.2,19.1,12,22,1-2,210.a=1,b=3三、程序完善题1.a>b、c>x四、编程题1.【参考代码】#include<stdio.h>int main( )int a, b, c,d,min; printf("输入4个整数："

7、;); scanf("%d%d%d%d",&a,&b,&c,&d);if(a < b) min = a; else min = b; if(c < min) min=c; if(d<min) min=d; printf("%dn",min); return 0 ;2.【参考代码】#include<stdio.h>int main( ) int num,a,b,c,d; printf("请输入一个四位整数："); scanf("%d",&num);

8、a=num/1000;b=num%1000/100;c=num%100/10;d=num%10; printf("各位数字之和为：%dn",a+b+c+d);return 0 ;3.【参考代码】#include<stdio.h>int main( )int x; printf("请输入x："); scanf("%d",&x);printf("y的值为：");if(x<0)printf("%dn",x);else if(x<50)printf("%dn&q

9、uot;,3*x-2);else if(x<100)printf("%dn",4*x+1);elseprintf("%dn",5*x);return 0 ;4.【参考代码】#include<stdio.h>int main( )int dj;float zl,je,yfk;printf("请输入等级（14）: ");scanf("%d",&dj);if (dj>4|dj<1)printf("无此等级的苹果！n");return 0;printf("

10、请输入重量（公斤）: ");scanf("%f",&zl);printf("n");switch (dj) case 1 : je=5.5*zl; break;case 2 : je=4.3*zl; break;case 3 : je=3.0*zl; break;case 4 : je=2.5*zl; break;printf("您选择苹果级别: %d 级n",dj);printf("您购买苹果重量: %.2f公斤n",zl);printf("您应付金额为: %.2f元n",j

11、e);printf("n");printf("顾客所付金额: ");scanf("%f",&yfk);if (yfk<je)printf("Data Error!n");return 0;printf("应找您: %.2f元n",yfk-je);return 0 ;第5章 循环结构程序设计一、选择题12345678(1)8(2)91011CBBBABBBCDCB二、程序阅读题1.1,2,02 .m=4,n=23.A2C4E64.1325.46.k=0,m=57.x=88.1.69.

12、三、程序完善题1.( ch > 'Z' && ch <= 'Z' + 4 ) |(ch > 'z' ) ch - 262.k k/10 continue 3.i + t * 10 s = s + t4.fabs( t ) >= 1e-6 f = -f 5.i<10 j%3 !=0四、编程题1.【参考代码】#include<stdio.h>int main( )int n , i , j , k ;printf( "Output：n" ) ;for(n = 100 ; n

13、 < 1000 ; n+ )i = n % 10 ; /* 个位 */j = ( n / 10 ) % 10 ; /* 十位 */k = n / 100 ; /* 百位 */if ( n = i * i * i + j * j * j + k * k * k )printf( "%dn" , n ) ;return 0 ;2. 【参考代码】#include<stdio.h>int main ( ) int i , m , n , t , p , k ; printf( "Please input: " ) ;scanf ( "

14、%d,%d" , &m , &n ) ;if( m < n )t = n ;n = m ;m = t ; p = m * n ;while ( n != 0 ) /* 余数不为0，继续相除，直到余数为0 */i = m % n ;m = n ;n = i ; k = p / m ;printf( "%d,%dn" , m , k );return 0 ;3. 【参考代码】#include<stdio.h>int main( )int i , n , t , sum ;t = 1 ;sum = 0 ;printf( "Pl

15、ease input: n = " ) ;scanf( "%d" , &n ) ;for( i = 1 ; i <= n ; i+ ) t = t * i ;sum = sum + t ;printf( "1!+2!+%d!= %dn" , n , sum ) ;return 0 ;4. 【参考代码】#include<stdio.h>int main( ) int i , m ;double sum = 0 , k = 1 ;printf( "Please input : m=" ) ;scanf(

16、 "%d" , &m ) ;for( i = 1 ; i <= m ; i+ )sum = sum + k / i ;k = -k ;printf( "sum=%4.2fn" , sum ) ;return 0 ;第6章 数组一、选择题12345678910111213141516DDDBCCBCCDDBDDCD二、程序阅读题1 82 43 0,24 125 t*M6 mo7 fwo三、程序完善题1 k = i j = i ak = max aj = max2 sum += scorei scorei<avg3 si = si + a

17、ij printf( "n" ) ;4 j = strlen( str ) 1 strj = k5 ( c = getchar( ) ) != '#' numc-'A' += 1 四、编程题1. 【参考代码】#include<stdio.h>#define N 5int main( )int aN , i , j , r , temp ;printf( "Please input %d numbersn" , N ) ;for( i = 0 ; i < N ; i+ )scanf( "%d&qu

18、ot; , &ai ) ;for( i = 0 ; i < N - 1 ; i+ )r = i ;for( j = i + 1 ; j < N ; j+ )if( aj < ar )r = j ;if( r != i )temp = ar ;ar = ai ;ai = temp ;printf( "The array after sort:n" ) ;for( i = 0 ; i < N ; i+ )printf( "%5d" , ai ) ;printf( "n" ) ;return 0 ;2. 【参

19、考代码】#include<stdio.h>int main( )int a10 = 1 , 2 , 3 , 6 , 7 , 8 , 9 , 10 ;int x , j , k = 0 ;printf( "Please input :x= " ) ;scanf( "%d" , &x) ; if( x > a7 )a8 = x ;elsefor( j = 0 ; j < 8 ; j+ )if( x < aj )break ;for(k = 8 ; k > j ; k- )ak = ak - 1 ;aj = x ;f

20、or( j = 0 ; j < 9 ; j+ )printf( "%5d" , aj ) ;printf( "n" ) ;return 0 ;3. 【参考代码】#include<stdio.h>int main( )int a55 = 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21, 22,23,24 ;int i , j ,sum = 0 ;for ( i = 0 ; i < 5 ; i+ )for ( j = 0 ; j < 5 ; j+)printf( &

21、quot;%4d" , aij ) ;printf( "n" ) ;for( i =0 ;i < 5 ; i+ )sum += aii ;printf( " sum=%4dn" , sum ) ;return 0 ;4. 【参考代码】#include<stdio.h>int main( )char s1100 , s230 ;int i , j ;printf( "Please input s1:" ) ;gets( s1 ) ;printf( "Please input s2:" )

22、;gets( s2 ) ;for( i = 0 ; s1i != '0' ; i+ ) ;for( j = 0 ; s2j != '0' ; j+ , i+ )s1i = s2j ;s1i = '0' ;printf( "Outputns1:" ) ;puts( s1 ) ;return 0 ;5. 【参考代码】#include<stdio.h>int main( )char s1100 ;int i ;printf( "Please input s1:" ) ;gets( s1 ) ;for(

23、 i = 0 ; s1i != '0' ; i+ ) ;printf( "The length of s1 is %dn" ,i ) ;return 0 ;第7章 函数一、选择题123456789101112131415BDDABBCBDDAADDA二、程序阅读题1 max is 22 a=1,b=23 1 114 a=11,b=12,c=25 66 7 8 97 8 178 0 1 2 0 1 2 三、程序完善题1 float area ( float r ) return s2 z = fun( x , y ) z = z * x 3 count =fu

24、n( score ) count+四、编程题1. 【参考代码】#include<stdio.h>int main( ) void f(int n) ;int n ;printf( "Please input: n= " ) ;scanf( "%d" , &n ) ;if( n <= 0)printf( "Wrong number!n" ) ;elsef( n ) ;return 0 ;void f(int n)if( n % 2 = 1 )printf( "%d is a odd number.n&

25、quot; , n ) ;elseprintf( "%d is a even number.n" , n ) ;2. 【参考代码】#include < stdio.h >#include < math.h >int main( )void f( int m ) ;int m ;printf( "Please input: m= " ) ; scanf( "%d" , &m ) ;f( m ) ;return 0 ;void f( int m )int i , k ;k = sqrt( m );for(i

26、 = 2 ; i <= k ; i+ )if( m % i = 0 ) break; if (i >= k + 1 ) printf( "%d is a Prime Number.n" , m ) ; else printf( "%d is not a Prime Number.n" , m ) ;3. 【参考代码】#include<stdio.h>int gys( int m , int n )int r ;r = m % n ;while( r != 0 )m = n ;n = r ;r = m % n ;return n ;

27、int gbs( int m , int n , int r )return m * n / r ;int main( )int m , n , t ;printf( "Please input(m,n)：" ) ;scanf( "%d%d" , &m , &n ) ;if( m < n )t = m ;m = n ;n = t ;t = gys( m , n ) ;printf( "gys=%dn" , t ) ;t = gbs( m , n , t ) ;printf( "gbs=%dn"

28、 , t ) ;return 0 ;4. 【参考代码】#include<stdio.h>int main( )void mystrcat( char s1100 , char s230 ) ;char s1100 , s230 ;printf( "Please input s1:" ) ;gets( s1 ) ;printf( "Please input s2:" ) ;gets( s2 ) ;mystrcat( s1 , s2 ) ;printf( "Outputns1:" ) ;puts( s1 ) ;return 0

29、 ;void mystrcat( char s1100 , char s230 )int i , j ;for( i = 0 ; s1i != '0' ; i+ ) ;for( j = 0 ; s2j != '0' ; j+ , i+ )s1i = s2j ;s1i = '0' ;第8章 编译预处理一、选择题123456ADDABA二、程序阅读题1 6,182 153 5第9章 指针一、选择题123456789101112DBBCDCCCDBAC1314151617CDDAC二、填空题1.地址 ， NULL（或0）2 .char a, *p; ，

30、 scanf("%c", &a); ， p=&a;3.*m4.for( k=0; k<10; k+ )5.*(p+i) ， pi ， *(x+i)6.stri或*( str + i ) ， i三、程序阅读题1.gae2. bcdABCD3. 7, 8, 84. 8 45. 3 14 26. efgh7. w,one8. 7四、程序完善题1.ai 或 *( a + i )2.*p!='0' *p-'0' 3.p1 p2-x4.max(int a , int b ); p = max四、编程题1.【参考代码】#include

31、<stdio.h>void sort( int *a , int *b , int *c );int main()int m , n , t ;printf( "Please input(m n t):" ) ;scanf( "%d%d%d" , &m , &n , &t ) ;sort( &m , &n , &t ) ;printf( "The result is :%dt%dt%dn" , m , n , t ) ;return 0 ;void sort( int *a

32、, int *b , int *c )int temp ;if( *a > *b ) temp = *a ; *a = *b ; *b = temp ; if( *a > *c ) temp = *a ; *a = *c ; *c = temp ; if( *b > *c ) temp = *b ; *b = *c ; *c = temp ; 2.【参考代码】程序1:#include <stdio.h>int strcompare( char *str1 , char *str2 );int main( )int m ; char s120 , s220 , *p

33、1 , *p2 ; printf( "Please input(string1):" ) ; scanf( "%s" , s1 ) ;printf( "Please input(string2):" ) ; scanf( "%s" , s2 ) ; m = strcompare ( s1 , s2 ) ; printf( "The result of strcompare is: %dn" , m ) ;return 0 ;int strcompare( char *str1 , char *s

34、tr2 )int i = 0 ; while( ( *( str1 + i ) = *( str2 + i ) ) &&( *( str1 + i ) != '0' ) )i+ ; return( *( str1 + i ) - *( str2 + i ) ) ;程序2:#include <stdio.h>int strcompare( char *str1 , char *str2 );int main( )int m ; char s120 , s220 , *p1 , *p2 ; printf( "Please input(strin

35、g1):" ) ; scanf( "%s" , s1 ) ;printf( "Please input(string2):" ) ; scanf( "%s" , s2 ) ; p1 = s1 ;p2 = s2 ; m = strcompare ( p1 , p2 ) ; printf( "The result of strcompare is: %dn" , m ) ;return 0 ;int strcompare( char *str1 , char *str2 )int i = 0 ; while(

36、 ( *( str1 + i ) = *( str2 + i ) ) &&( *( str1 + i ) != '0' ) )i+ ; return( *( str1 + i ) - *( str2 + i ) ) ;程序3:#include <stdio.h>int strcompare( char str1 , char str2 );int main( )int m ; char s120 , s220 , *p1 , *p2 ; printf( "Please input(string1):" ) ; scanf( &qu

37、ot;%s" , s1 ) ;printf( "Please input(string2):" ) ; scanf( "%s" , s2 ) ; p1 = s1 ;p2 = s2 ; m = strcompare ( p1 , p2 ) ; printf( "The result of strcompare is: %dn" , m ) ;return 0 ;int strcompare( char *str1 , char *str2 )int i = 0 ; while( ( str1i = str2i ) &&

38、amp;( str1i != '0' ) )i+ ; return( str1i- str2i ) ;第10章 结构体与共用体一、选择题1234567891011CBACCDDDCBD二、填空题1.162 .p->next=head->next head->next=p3.p->next三、程序阅读题1.51,60,212. 163. 1001,ChangRong,1098.0四、程序完善题1.sizeof( struct ps ) 或 sizeof( bt )2.p=p->next 3.personi.sex五、编程题1.【参考代码】#defin

39、e N 3#include <stdio.h>struct studentchar num6 ;char name8 ;int score2 ;float ave ; ;void input( struct student stuN ) ;void average( struct student stuN ) ;int max( struct student stuN ) ;int main( ) int i , j ;struct student stuN ;input( stu ) ;average( stu ) ;printf( "NotNametScore1tSc

40、ore2tAveragen" ) ;for( i = 0 ; i < N ; i+ )printf( "%st%st" , stui.num , ) ;for( j = 0 ; j < 2 ; j+ )printf( "%dt" , stui.scorej ) ;printf( "%8.2fn" , stui.ave ) ;i = max( stu ) ;printf( "nThe max is：n" ) ;printf( "NotNametScore1tScor

41、e2tAveragen" ) ;printf( "%st%st" , stui.num , ) ;for( j = 0 ; j < 2 ; j+ )printf( "%dt" , stui.scorej ) ;printf( "%5.2fn" , stui.ave ) ;return 0;void input( struct student stuN)int i , j ;for(i=0;i<N;i+)printf("nPlease input No%d student:n"

42、;,i+1);printf("No:");scanf("%s",stui.num);printf("Name:");scanf("%s",);for(j=0;j<2;j+)printf("score %d:",j+1);scanf("%d",&stui.scorej);void average( struct student stuN)int i , j , sum ;for(i=0;i<N;i+)for(j=0 , stui.ave =

43、 0 ;j<2;j+) stui.ave += stui.scorej;stui.ave = stui.ave / 2 ;int max( struct student stuN)int i , max , index;max = stu0.ave ;index = 0 ;for( i = 1 ; i < N ; i+ )if( max < stui.ave )max = stui.ave ;index = i ;return index;2.【参考代码】#include<stdio.h>#include<stdlib.h>struct node sh

44、ort int data ;struct node *next ; ;typedef struct node NODE ;struct node *CreatLink( ) ;void PrintLink( NODE *head ) ;int max( NODE *head );int main( )NODE *head ;int max_value ;head = CreatLink( ) ;PrintLink( head ) ;max_value = max( head ) ;printf( "The max is:%dn" , max_value ) ;return

45、0 ;struct node *CreatLink( ) NODE *head , *p , *q ;short int num ;head = ( NODE * )malloc( sizeof( NODE ) ) ;head->next = NULL ;p = head ;printf( "Please input( end of -1)!:n" ) ;scanf( "%d" , &num ) ;while( num != -1 )q = ( NODE *)malloc( sizeof( NODE ) ) ; q->data = n

46、um ;p->next = q ;p = q ;scanf( "%d" , &num ) ; p->next = NULL ;return head ;void PrintLink( NODE *head )NODE *p;p = head->next ;printf( "The data is:n" ) ;while( p != NULL )printf( "%4d" , p->data ) ; p = p->next ;printf( "n" ) ;int max( NOD

47、E *head )NODE *p;short int max = -32768;p = head->next ;while( p != NULL )if( max < p->data )max = p->data ; p = p->next ;return max ;第11章 位运算一、选择题1234DBCA二、填空题1.0000 11112 .x | ff00 3.4 3三、程序阅读题1.02. 11 223. 0四、编程题1.【参考代码】#include<stdio.h>int main()short int data , low ,high ;p

48、rintf( "Please input( short int):" ) ;scanf( "%d" , &data ) ;low = data & 0x00ff ; /* 0x00ff表示低字节全1 */high = data & 0xff00 ; /* 0xff00表示高字节全1 */ printf( "data:0x%x,the value of low byte is:0x%xn" , data , high ) ;printf( "data:0x%x,the value of high byt

49、e is:0x%xn" , data , low ) ;return 0 ;2.【参考代码】#include <stdio.h>int main( )short int data , result ;printf( "Please intput(short int):" ) ;scanf( "%d" , &data ) ;result = data 0x000f ; /* 0x000f表示低4位全1，高12位全0 */ printf( "The data is 0x%x nThe result is :0x%xn&

50、quot; , data,result ) ;return 0 ;第12章 文件操作一、选择题123456789101112DB、CCBBABCDBCC131415CDC二、填空题1.二进制 ASCII(文本)2 .FILE *fp # include <stdio.h> 3.n 1 buf的首地址4. 15. 用以获得文件读写位置标记指针的位置，函数返回值为当前文件读写位置标记指针相对于文件开头的字节数 6. 使文件读写位置标记指针重新返回文件的开头 三、程序阅读题1.1 22. end3. 34. hello,四、程序完善题1.! feof (fp) fgetc (fp) 2.

51、fopen (“num.dat”,”r”) fp,”%d”,&temp z+ 3.( ch=getchar() ) ch , fp 五、编程题1.【参考代码】#include<stdio.h>#include<stdlib.h>#include<string.h>int main( ) FILE *fp ;char str100 , filename10 ;int i = 0 ;if( ( fp = fopen( "upper.txt" , "w+" ) ) = NULL )printf( "Cann

52、ot open file!n" ) ;exit( 0 ) ;printf( "Please input(string):n" ) ;gets( str ) ;while( stri != '!' )if( stri >= 'a' && stri <= 'z' )stri = stri - 32 ;fputc( stri , fp ) ;i+ ;rewind( fp ) ;fgets( str , strlen( str ) + 1 , fp ) ;printf( "nThe result is :n" ) ;printf( "%sn" , str ) ;fclose( fp ) ;return 0 ;2.【参考代码】#include<stdio.h>#include<stdlib.h>#define N 5struct studentchar num10 ; char name8 ; int score3 ; float ave ; stuN ;int main( )int i , j , sum ; FILE *fp ;for( i = 0 ; i < N ;