[理学]标准C语言程序设计及应用周纯杰每章课后编程题

1、P71#include <stdio.h>#include <conio.h>void main() clrscr(); int i; int sum; sum=0; printf("Enter i:"); scanf("%d",&i); while (i<=100) sum=sum+i; i+; printf("sum=%dn",sum); getch();P96(6)#include <stdio.h>#include <conio.h>void main() int

2、a, b, sum, i; a=8; b=1; sum=8; for(i=1; i<=9;i+); b=b+3; a=a+b; sum+=a; printf("sum=%dn",sum); getch();P97(18)#include <stdio.h>#include <conio.h>void main() float x, a, b, expx; while(1) char i; a=1; expx=1; b=1; printf("please input x:"); scanf("%f",&am

3、p;x); if(x<1e-6) break; for(i=1;i+) a*=x; b*=i; expx+=a/b; if(a/b<1e-6) break; else continue; printf("expx=%fn",expx); getch(); clrscr(); P90#include <stdio.h>#include <conio.h>void main() unsigned long int a, i; for(a=10;a<=100;a+) for(i=2;i<a;i+) if(a%i=0) break;

4、if(i>=a) printf("%dt",a); getch();P97(9)#include <stdio.h>#include <stdlib.h>#include <time.h>void main() unsigned int a, b, i; randomize(); a=random(65535); for(i=1;i<=20;i+) printf("Please guess a(065535):"); scanf("%d",&b); if(a=b&&

5、;i=1) printf("Right! You have guessed 1 time.n"); printf("Enter any singel number to break.n"); scanf("%d",&b); if(1) break; else if(a=b&&i>1) printf("Right! You have guessed %d times.n",i); printf("Enter any singel number to break.n")

6、; scanf("%d",&b); if(1) break; else if(a>b) printf("Wrong! Your number is small.n"); continue; else printf("Wrong! Your number is large.n"); continue; P97(19)#include <stdio.h>#include <conio.h>#include <math.h>void main() float x, a; char i; x=

7、1.0; printf("Please input a(ji suan a de ping fang gen):"); scanf("%f",&a); for(i=1;i+) if(fabs(x-(x+a/x)/2)<1e-5) x=(x+a/x)/2; break; else x=(x+a/x)/2; printf("x=%fn",x); getch(); clrscr();P97(16)#include <stdio.h>#include <conio.h>void main() long i

8、nt x, S; int a, n, i; printf("Please input a, n:"); scanf("%d,%d",&a,&n); S=0; x=0; for(i=1;i<=n;i+) x=x*10+a; S=S+x; printf("S=%ldn",S); getch();P97(11)#include <stdio.h>#include <conio.h>void main() int i; int a, b; printf("Please input a,

9、b:"); scanf("%d,%d",&a,&b); for(i=a<b?a:b;i>0;i-) if(a%i=0&&b%i=0) printf("The max is %d.n",i); break; for(i=a>b?a:b;i+) if(i%a=0&&i%b=0) printf("The min is %d.n",i); break; getch();P139(2)#include<stdio.h>#include<conio.h&

10、gt;void main() int n, x; int i, j; int a100; printf("nInput the number of the group:n"); scanf("%d",&n); printf("Input the group of numbers:n"); for(i=0;i<n;i+) scanf("%d",&ai); printf("Input x:n"); scanf("%d",&x); if(x>=a

11、n-1) an=x; printf("Now the group is:n"); for(i=0;i<n+1;i+) printf("%d ",ai); else for(i=0;i<n;i+) if(x<=ai) for(j=n;j>i;j-) aj=aj-1; ai=x; break; printf("Now the group is:n"); for(i=0;i<n+1;i+) printf("%d ",ai); getch(); P139(6)#include<stdio

12、.h>#include<string.h>#include<conio.h>void main() int grade100, tg; char name10010, tn100; int n; int i, j; printf("Input the number:n"); scanf("%d",&n); printf("Input the grade and name:"); for(i=0;i<n;i+) printf("n"); scanf("%d&quo

13、t;,&gradei); scanf("%s",&namei); for(i=0;i<n-1;i+) for(j=0;j<n-1-i;j+) if(gradej<gradej+1) tg=gradej; gradej=gradej+1; gradej+1=tg; strcpy(tn,namej); strcpy(namej,namej+1); strcpy(namej+1,tn); printf("From large to small by grade:"); for(i=0;i<n;i+) printf(&qu

14、ot;n"); printf("%d ",gradei); puts(namei); P139(7)#include<stdio.h>#include<string.h>#define SIZE 4void main() int aSIZESIZE; int i, j, t, max, n=0; int row=0, column=0; printf("Input a two-dimensional array:"); for(i=0;i<SIZE;i+) printf("n"); for(j=

15、0;j<SIZE;j+) scanf("%d",&aij); for(i=0;i<SIZE;i+) max=ai0; for(j=0;j<SIZE;j+) if(max<aij) max=aij; row=i; column=j; for(t=0;t<SIZE;t+) if(atcolumn<max) break; if(t=SIZE) printf("One saddle point is %d(%d, %d).n",max, row, column); n+; if(i=SIZE&&n=0)

16、 printf("There is no saddle point.n"); P139(5)#include<stdio.h>#include<string.h>#include<conio.h>void main() char str1100, str2100; int i, j; printf("nInput string1 and string2:n"); gets(str1); gets(str2); for(i=strlen(str1),j=0;j<strlen(str2);i+,j+) str1i=s

17、tr2j; str1strlen(str1)+strlen(str2)='0' printf("Now the string is:n"); puts(str1); getch(); clrscr();P170(4)#include <stdio.h>#include <conio.h>#include <ctype.h>void main()char str100, *pstr=str;long int a50=0, *pa=a;int time, flag, n, i;clrscr();printf("Ple

18、ase input a string:n");gets(str);for(time=1, flag=0; *pstr!='0' pstr+)if(isdigit(*pstr)flag=1;*pa*=time;*pa+=(*pstr-'0');time=10;n=pa-a;elseif(flag=1)pa+;time=1;flag=0;pa=a;printf("nNumber:%dn",n);for(i=0; i<=n; i+)printf("a%d=%ldn",i,pai);getch();P170(6)#

19、include <stdio.h>#include <conio.h>#include <string.h>#define N 6void main()char strN20, *pN, *temp;char *pp=p;int i;clrscr();printf("Please %d strings:n",N);for(i=0; i<N; i+)gets(stri);pi=stri;for(i=0; i<N-1; i+)pp=p;while(*pp-p<N-i)if(strcmp(*pp+,*(pp+1)>0)t

20、emp=*pp;*pp=*(pp+1);*(pp+1)=temp;printf("nIn order:n");for(i=0; i<N; i+)puts(*(p+i);getch();P170(1)#include <stdio.h>#include <conio.h>#include <string.h>void main()char str1100, str2100;char *p1=str1, *p2=str2;int n=0;clrscr();printf("Please input string1 and str

21、ing2:n");gets(str1);gets(str2);while(*p1!='0'&&*p2!='0')if(*p1+=*p2+)n+;printf("Number of the same char:%d",n);getch();P170(3)#include <stdio.h>#include <conio.h>#include <string.h>#define N 20void main()char str1N, str2N;char *p1=str1, *p2=st

22、r2;int m;clrscr();printf("Please input a string:n");gets(str1);printf("nPlease input m:n");scanf("%d",&m);while(m>strlen(str1)|m<1)printf("nError!nPlease input m:");scanf("%d",&m);p1+=m-1;while(*p2+=*p1+)!='0');*p2='0'pu

23、ts(str2);getch();P170(7)#include <stdio.h>#include <conio.h>#include <string.h>void main()char str100, *p=str, temp;int i, n;clrscr();printf("Please input a string:n");gets(str);n=strlen(str);printf("nThe length of the string is %d.",n);for(i=0; i<n/2; i+)tem

24、p=*(p+i);*(p+i)=*(p+n-i-1);*(p+n-i-1)=temp;printf("nNow the string is:n");puts(str);getch();P170(8)#include <stdio.h>#include <conio.h>#include <string.h>#define N 5void main()char text500, *p;int i;char sN20="from","in","at","an",&

25、quot;on"clrscr();printf("Please input the text:n");gets(text);for(i=0; i<N; i+)while(1)p=strstr(text,si);if(p!=NULL)strcpy(p,p+strlen(si)+1);elsebreak;printf("nAfter deleting "from""in""at""an""on",the text is:n");puts(tex

26、t);getch();P170(8)#include <stdio.h>#include <conio.h>#include <string.h>#define N 500#define IsnotLetter(x) (!(x)>='A'&&(x)<='Z')&&!(x)>='a'&&(x)<='z')/IsnotLetter(x) stands for that 'x' is not a letter.vo

27、id delete_word(char *pstr, char *pword);int one_word(char *pstr, char *p, int n);/* one_word is used to judge whether the son string p(n is its length) in the string pstr is a single word. */void main()char textN; clrscr();printf("Please input a text:n");gets(text);delete_word(text, "

28、from");delete_word(text, "in");delete_word(text, "at");delete_word(text, "an");delete_word(text, "on");printf("nAfter deleting "from""in""at""an""on", the text is:n");puts(text);getch();void dele

29、te_word(char *pstr, char *pword)char *p, *pflag=pstr;int word_length;word_length=strlen(pword);while(1)p=strstr(pflag,pword);if(p=pflag)pflag+;if(p!=NULL&&one_word(pstr, p, word_length)strcpy(p, p+word_length);if(*p=' ')strcpy(p, p+1);else if(p=NULL)break; pflag+;int one_word(char *p

30、str, char *p, int n)if(p=pstr&&IsnotLetter(*(p+n)return 1;else if(p!=pstr&&IsnotLetter(*(p-1)&&IsnotLetter(*(p+n)return 1;else return 0;P230(4)#include <stdio.h>#include <conio.h>#include <string.h>#define N 20void delete_c(char *p, char c);void main()char s

31、trN, c;clrscr();printf("Please input a string:n");gets(str);printf("nPlease input the char you want to delete:n");scanf("%c",&c);delete_c(str, c);printf("nNow the string is:n");puts(str);getch();void delete_c(char *p, char c)for( ;*p!='0' p+)if(*p=

32、c)strcpy(p, p+1);p-;P230(1)#include <stdio.h>#include <conio.h>long int SquSum(int x, int y);void main()int a, b;long int c;clrscr();printf("Please input a,b:n");scanf("%d,%d",&a,&b);c=SquSum(a, b);printf("na2+b2=%ld",c);getch();long int SquSum(int x

33、,int y)return(x*x+y*y);P230(2)#include <stdio.h>#include <conio.h>long int min(int x, int y);int max(int x, int y);void main()int a, b, max1;long int min1;clrscr();printf("Please input a,b:n");scanf("%d,%d",&a,&b);max1=max(a, b);min1=min(a, b);printf("nma

34、x common denominator:%d",max1);printf("nmin common multiple:%ld",min1);getch();int max(int x, int y)int temp;if(x<y)temp=x;x=y;y=temp;while(y!=0)temp=x%y;x=y;y=temp;return x;long int min(int x, int y) return (x*y)/max(x, y);P230(5)#include <stdio.h>#include <conio.h>int

35、 judge_sushu(long int x);void main()long int a;clrscr();printf("Please input a int number:n");scanf("%ld",&a);if(judge_sushu(a)printf("It is a sushu.");elseprintf("It isn't a sushu.");getch();int judge_sushu(long int x)int i;for(i=2; i<=x/2; i+)if(x

36、%i=0)return 0; return 1;P231(6)#include <stdio.h>#include <conio.h>#define N 20void my_strcat(char *p, char *p1, char *p2);void main()char s1N, s2N, sN*2;clrscr();printf("Please input string1 and string2:n");gets(s1);gets(s2);my_strcat(s, s1, s2);printf("nAdd string2 to th

37、e end of string1:n");puts(s);getch();void my_strcat(char *p, char *p1, char *p2)for( ;*p1!='0' p+,p1+)*p=*p1;for( ;*p2!='0' p+,p2+)*p=*p2;*p='0'P231(7)#include <stdio.h>#include <conio.h>#define N 50void str_tongji(char *pstr, int *pnum);void main()char strN;

38、int num4=0,0,0,0;clrscr();printf("Please input a string:n");gets(str);str_tongji(str, num);printf("nLetter:%dn",num0);printf("Figure:%dn",num1);printf("Space:%dn",num2);printf("Other:%dn",num3);getch();void str_tongji(char *pstr, int *pnum)for( ;*pst

39、r!='0' pstr+)if(*pstr>='A'&&*pstr<='Z')|(*pstr>='a'&&*pstr<='z')pnum0+;else if(*pstr>='0'&&*pstr<='9')pnum1+;else if(*pstr=' ')pnum2+;elsepnum3+;P231(9)#include <stdio.h>#include <conio

40、.h>#define N 10void sort(int *pnum, int n, int flag);void main()int numN=0, n, flag, i;clrscr();printf("How many ints will yo input:n");scanf("%d",&n);printf("nNow, input the ints one by one:n");for(i=0; i<n; i+)scanf("%d",&numi);printf("How

41、 to sort them?n");printf("From large to small: input "1".n");printf("from small to large: input any other figure.n");scanf("%d",&flag);sort(num, n, flag);printf("nNow, they are:n");for(i=0; i<n; i+)printf("%dt",numi);getch();voi

42、d sort(int *pnum, int n, int flag)int i, j, temp;if(flag=1)for(i=0; i<n-1; i+)for(j=0; j<n-i-1; j+)if(pnumj<pnumj+1)temp=pnumj;pnumj=pnumj+1;pnumj+1=temp;elsefor(i=0; i<n-1; i+)for(j=0; j<n-i-1; j+)if(pnumj>pnumj+1)temp=pnumj;pnumj=pnumj+1;pnumj+1=temp;P231(10)#include <stdio.h&

43、gt;#include <conio.h>#include <string.h>#define LINE 10#define SIZE 100int input(char (*ptext)SIZE, int n);int find(char (*ptext)SIZE, int n, int flag);void main()char textLINESIZE;int n, line_num, flag;clrscr();printf("Please input a text less than %d lines, end with a space in a s

44、ingle line:n",LINE);n=input(text, LINE);printf("nInput "1" for the max line,others for the min line:");scanf("%d",&flag);line_num=find(text, n, flag);printf("nThe line is:n");puts(textline_num);getch();int input(char (*ptext)SIZE, int n)int i;for(i=0;

45、 i<n; i+)gets(ptexti);if(strcmp(ptexti, " ")=0)break;return i;int find(char (*ptext)SIZE, int n, int flag)int i, line_num=0;if(flag=1)for(i=1; i<n; i+)if(strcmp(ptexti, ptextline_num)>0)line_num=i;elsefor(i=1; i<n; i+)if(strcmp(ptexti, ptextline_num)<0)line_num=i;return line

46、_num;P231(14)#include <stdio.h>#include <conio.h>#include <string.h>#define MAX 10#define SIZE 20int input(char (*p)SIZE, int max);void sort(char (*p)SIZE, int n);void output(char (*p)SIZE, int n);void main()char strMAXSIZE;int n;clrscr();printf("Please input less than %d stri

47、ngs, end with string " ":n",MAX);n=input(str, MAX);sort(str, n);printf("nAfter sorted:n");output(str, n);getch();int input(char (*p)SIZE, int max)int i;for(i=0; i<max; i+)gets(pi);if(strcmp(pi, " ")=0)break;return i;void sort(char (*p)SIZE, int n)int i, j;char t

48、empSIZE;for(i=0; i<n-1; i+)for(j=0; j<n-i-1; j+)if(strcmp(pj, pj+1)>0)strcpy(temp, pj);strcpy(pj, pj+1);strcpy(pj+1, temp);void output(char (*p)SIZE, int n)int i;for(i=0; i<n; i+)puts(pi);P266(4)#include <stdio.h>#include <conio.h>#include <string.h>#include <stdlib.

49、h>#define MAX 20 /The largest number of studentstypedef structint year;int month;int day;DATE;typedef structchar number20;int stunum;DATE sheet;CLASS;typedef structchar number20;char name20;int grade4;float aver;STUDENT;void input_class(CLASS *p);void input_student(STUDENT *p, int n);void average

50、(STUDENT *p, int n);float remain_2float(float x); /Remain 2 figures after the point.void sort(STUDENT *p, int n);void output(CLASS *pc, STUDENT *ps, int n);void main()CLASS cla;STUDENT stuMAX;clrscr();input_class(&cla);input_student(stu, cla.stunum);average(stu, cla.stunum);sort(stu, cla.stunum)

51、;output(&cla, stu, cla.stunum);getch();void input_class(CLASS *p)char s20;printf("Please input the class information:");printf("nClass number:");gets(p->number);printf("Number of students:");gets(s);p->stunum=atoi(s);printf("Date:n");printf("yea

52、r:");gets(s);p->sheet.year=atoi(s);printf("month:");gets(s);p->sheet.month=atoi(s);printf("day:");gets(s);p->sheet.day=atoi(s);printf("n");void input_student(STUDENT *p, int n)int i, j, s3;printf("Now, please input the students' information:n");for(i=0; i<n; i+)printf("Number:");gets(pi.number);printf("Name:");gets();for(j=0; j<4; j+)printf("Grade of c