C语言课程设计数据分节与删除字符学生成绩统计程序的设计

1、课程设计任务书学 院信息科学与工程专 业通信工程学 生 姓 名Neko学 号10030603*设 计 题 目C语言课程设计内容及要求：加深对C语言基础知识的掌握，使用C语言编程实现以下题目的设计。题目名称： 数据分节与删除字符、学生成绩统计程序的设计内容及要求：1、编写一个程序，将某个位数不确定的正整数进行三位分节后输出，比如输入87654321，应输出87,654,3212、编写函数fun(char a,int k,int n),其功能是:删除字符串中指定下标开始的n个字符,形参中,a数组中存放字符串,k中存放指定下标。例如,若输入字符串为:Helloloa World!,k的值是5,n的值

2、是3。应输出:Hello World!3、学生成绩统计程序设计设计结构体数组，结构中包含学生数据为：学号、姓名、物理分数、数学分数、外语分数、计算机分数。设计各个函数，分别实现以下功能：（1）输入学生数据 （2）显示所有学生信息 （3）统计每科的最高分、最低分；不及格人数、不及格学生的数据。设计菜单，通过选择菜单调用以上各函数。软件开发环境Windows XP，TC2.0或Visual C+ 6.0进度安排：第18周：C语言基础知识练习第18周：算法设计第19周：编写程序代码与程序调试第19周：答辩、验收程序指导教师（签字）：年 月 日学院院长（签字）：年 月 日目 录一、题目要求1二、算法设

3、计2三、编程实现12四、结果分析19五、参考文献24一、题目要求题目名称： 数据分节与删除字符、学生成绩统计程序的设计内容：1、编写一个程序，将某个位数不确定的正整数进行三位分节后输出，比如输入87654321，应输出87,654,3212、编写函数fun(char a,int k,int n),其功能是:删除字符串中指定下标开始的n个字符,形参中,a数组中存放字符串,k中存放指定下标。例如,若输入字符串为:Helloloa World!,k的值是5,n的值是3。应输出:Hello World!3、学生成绩统计程序设计设计结构体数组，结构中包含学生数据为：学号、姓名、物理分数、数学分数、外语分

4、数、计算机分数。设计各个函数，分别实现以下功能：（1）输入学生数据 （2）显示所有学生信息 （3）统计每科的最高分、最低分；不及格人数、不及格学生的数据。设计菜单，通过选择菜单调用以上各函数。要求：使用C语言完成上述程序的设计、编程和调试，开发环境可采用Turbo C 2.0、 WinTC或Visual C+ 6.0等。二、算法设计1.计算不确定位数正整数的位数，按照每三位为一节计算节数用于计算循环次数，计算并分配内存空间将其储存并逆序输出 是输入ai=1,temp=a,b=temp/10b0i=i+1,temp=b,b=temp/10i%3=0*p = (int *)malloc(c*siz

5、eof(int),j=0j<cc=i/3c=i/3+1j=j+1,d=a%1000,pc-j-1=d,a=a/1000开始否是否是否1j=0j<cjc-1输出,pj输出pj结束是j=j+1否12、编写函数fun(char a,int k,int n) a中存放字符串 k为指定下标,n为删除字符串的长度,利用循环按照要求依次删除开始输出input string:输入a输出input k,n:调用fun()结束输入k,n开始i<strlen(a)-ni=kai=ai+nai=0输出a是否结束i=i+13、学生成绩统计程序设计设计结构体数组，结构中包含学生数据为：学号、姓名、物理分

6、数、数学分数、外语分数、计算机分数。设计各个函数，分别实现以下功能：（1）录入：输入学生数据 （2）显示：所有学生信息 （3）统计：统计每科的最高分、最低分；输出不及格人数、不及格学生的数据。设计菜单，通过选择菜单调用以上各函数。开始system("cls")输出tt*Students' Grade Management System*ntt | 1. 输入 |ntt | 2. 显示|ntt | 3. 统计 |n tt | 0. 退出 |n tt*ntttGive your Choice(0-3):输入cc<'0'或c>'3

7、9;return(c-'0')结束是否menu_select()开始i=0signn且signN输出ttt学号:输出ttt姓名:输出ttt计算机分数:输入studn+i.num输出ttt外语分数:输入studn+i.m_Score.Mathematics输入studn+输出ttt物理分数:输入studn+i.m_Score.Computer输入studn+i.m_Score.ForeignLanguage输入studn+i.m_Score.Physics输入gets(x)输出tttany more records?(Y/N)输入sign输出ttt数学分数:i=i+1

8、return(n+i)结束1122是否33input(Student stud,int n)开始输出ttt-n输出ttnumber name Phy Math Fore Compn输出ttt-ni<n+1输出studi-1.num,,studi-1.m_Score.Physics,studi-1.m_Score.Mathematics,studi-1.m_Score.ForeignLanguage,studi-1.m_Score.Computeri=1i>1且i%10=0输出ttt-n输出tttsystem("pause")输出ttt-n

9、输出tttsystem("pause")结束是否是否i=i+111223344display(Student stud,int n)statistic(Student stud,int n)开始i=0sum=0Physics_high = 0Mathematics_high = 0ForeignLanguage_high =0Computer_high = 0Physics_low = 0Mathematics_low = 0ForeignLanguage_low = 0Computer_low = 0i<n11是否studPhysics_high.m_Score.P

10、hysics < studi.m_Score.PhysicsPhysics_high = istudPhysics_low.m_Score.Physics > studi.m_Score.PhysicsPhysics_low=i是否是否studi.m_Score.Physics < 60输出studi.num,,studi.m_Score.PhysicsstudMathematics_high.m_Score.Mathematics < studi.m_Score.MathematicsMathematics_high = i是否是否2892stud

11、Mathematics_low.m_Score.Mathematics > studi.m_Score.MathematicsMathematics_low=istudi.m_Score.Mathematics < 60输出studi.num,,studi.m_Score.MathematicsstudForeignLanguage_high.m_Score.ForeignLanguage < studi.m_Score.ForeignLanguage是否是否33ForeignLanguage_high = i是否44studForeignLanguage

12、_low.m_Score.ForeignLanguage > studi.m_Score.ForeignLanguageForeignLanguage_low=i是否studi.m_Score.ForeignLanguage < 60是否56statistic(Student stud,int n)输出studi.num,,studi.m_Score.ForeignLanguage56studComputer_high.m_Score.Computer < studi.m_Score.ComputerComputer_high = istudCompute

13、r_low.m_Score.Computer > studi.m_Score.ComputerComputer_low=i是否是否77studi.m_Score.Computer < 60studi.num,,studi.m_Score.Physics是否i=i+18statistic(Student stud,int n)statistic(Student stud,int n)输出tttthe Physics hignest score:nstudPhysics_high.num,studPhysics_,studPhysics_high.

14、m_Score.Physicstttthe Mathematics hignest score:nstudMathematics_high.num,studMathematics_,studMathematics_high.m_Score.Mathematicstttthe Foreign Language hignest score:nstudForeignLanguage_high.num,studForeignLanguage_,studForeignLanguage_high.m_Score.ForeignLanguagetttthe Compute

15、r hignest score:nstudComputer_high.num,studComputer_,studComputer_high.m_Score.Computernntttthe Physics lowest score:nstudPhysics_low.num,studPhysics_,studPhysics_low.m_Score.Physicstttthe Mathematics lowest score:nstudMathematics_low.num,studMathematics_,studMathematics_low

16、.m_Score.Mathematicstttthe Foreign Language lowest score:nstudForeignLanguage_low.num,studForeignLanguage_,studForeignLanguage_low.m_Score.ForeignLanguagetttthe Computer lowest score:nstudComputer_low.num,studComputer_,studComputer_low.m_Score.Computer9结束开始n=0menu_select()=1menu_sele

17、ct()=2menu_select()=3menu_select()=0输出tttInput RecordsntttStatisticn输出tttDisplay All Recordsn输出tttn=Input(stu,n) breakDisplay(stu,n) breakStatistic(stu,n)system("pause") exit(0)输出tttsystem("pause") break输出tttHave a Good Luck,Bye-bye!n结束是否是否是否是否是否main()三、编程实现程序的具体C语言代码如下：第1题：#incl

18、ude<stdio.h>#include<malloc.h> int main()int a;scanf("%d",&a);int i=1,b;int temp =a; b = temp/10; while(b) i+; temp = b; b = temp/10; int c=(i%3=0)?i/3:(i/3+1);int *p = (int *)malloc(c*sizeof(int);int j,d; for(j=0;j<c;j+) d=a%1000; pc-j-1 = d; a=a/1000; for(j=0;j<c;j+

19、) if(j !=c-1)printf("%d,",pj); else printf("%d",pj); getchar(); getchar(); 第2题：#include<stdio.h>#include<string.h>void fun(char a,int k,int n);main() char a80; int k; int n; printf("input string:n"); gets(a); printf("input k,n:n"); scanf("%d,%

20、d",&k,&n); fun(a,k, n); return 0;void fun(char a,int k,int n) int i; for(i=k;i<strlen(a)-n;i+) ai=ai+n; ai='0' puts(a);第3题：#include<stdio.h> /*引用库函数*/ #include<stdlib.h> #include<ctype.h> #include<string.h> typedef structint Physics;/*物理成绩*/int Mathema

21、tics;/*数学成绩*/int ForeignLanguage;/*外语成绩*/int Computer;/*计算机成绩*/Score;typedef struct /*定义结构体数组*/ char num10; /*学号*/ char name20; /*姓名*/ /int score; /*成绩*/ Score m_Score;Student; Student stu80; /*结构体数组变量*/ int menu_select() /*菜单函数*/ char c; do system("cls"); /*运行前清屏*/ printf("tt*Student

22、s' Grade Management System*n"); /*菜单选择*/ printf("tt | 1. 输入 |n"); printf("tt | 2. 显示|n"); printf("tt | 3. 统计 |n"); printf("tt | 0. 退出 |n"); printf("tt*n"); printf("tttGive your Choice(0-3):"); c=getchar(); /*读入选择*/ while(c<'

23、0'|c>'3'); return(c-'0'); /*返回选择*/ int Input(Student stud,int n) /*输入若干条记录*/ int i=0; char sign,x10; /*x10为清除多余的数据所用*/ while(sign != 'n' && sign != 'N') /*判断*/ printf("ttt学号:"); /*交互输入*/ scanf("ttt%s",studn+i.num); printf("ttt姓名

24、:"); scanf("ttt%s",studn+); printf("ttt物理分数:"); scanf("ttt%d",&studn+i.m_Score.Physics);printf("ttt数学分数:"); scanf("ttt%d",&studn+i.m_Score.Mathematics); printf("ttt外语分数:"); scanf("ttt%d",&studn+i.m_Score.For

25、eignLanguage); printf("ttt计算机分数:");scanf("ttt%d",&studn+i.m_Score.Computer); gets(x); /*清除多余的输入*/ printf("tttany more records?(Y/N)"); scanf("ttt%c",&sign); /*输入判断*/ i+; return(n+i); void Display(Student stud,int n) /*显示所有记录*/ int i; printf("ttt-n

26、"); /*格式头*/ printf("ttnumber name Phy Math Fore Compn"); printf("ttt-n"); for(i=1;i<n+1;i+) /*循环输入*/ printf("tt%-8s%-8s%dt%dt%dt%dn",studi-1.num,,studi-1.m_Score.Physics,studi-1.m_Score.Mathematics,studi-1.m_Score.ForeignLanguage,studi-1.m_Score.Comp

27、uter); if(i>1&&i%10=0) /*每十个暂停*/ printf("ttt-n"); /*格式*/ printf("ttt"); system("pause"); printf("ttt-n"); printf("ttt"); system("pause"); void Statistic(Student stud,int n) /*新增功能，输出统计信息*/ int i,sum=0;int Physics_high = 0;/*物理成绩*

28、/int Mathematics_high = 0;/*数学成绩*/int ForeignLanguage_high = 0;/*外语成绩*/int Computer_high = 0;/*计算机成绩*/int Physics_low = 0;/*物理成绩*/int Mathematics_low = 0;/*数学成绩*/int ForeignLanguage_low = 0;/*外语成绩*/int Computer_low = 0;/*计算机成绩*/for(i=0;i<n;i+) /*循环输入判断*/ /*物理最高和最低分的判断*/if(studPhysics_high.m_Score

29、.Physics < studi.m_Score.Physics)Physics_high = i;if(studPhysics_low.m_Score.Physics > studi.m_Score.Physics)Physics_low=i;/*不及格科目*/if(studi.m_Score.Physics < 60)printf("ttt%-16s%-15s%d Phyn",studi.num,,studi.m_Score.Physics);/*数学最高和最低分的判断*/if(studMathematics_high.m_Scor

30、e.Mathematics < studi.m_Score.Mathematics)Mathematics_high = i;if(studMathematics_low.m_Score.Mathematics > studi.m_Score.Mathematics)Mathematics_low=i;/*不及格科目*/if(studi.m_Score.Mathematics < 60)printf("ttt%-16s%-15s%d Mathn",studi.num,,studi.m_Score.Mathematics);/*外语最高和

31、最低分的判断*/if(studForeignLanguage_high.m_Score.ForeignLanguage < studi.m_Score.ForeignLanguage)ForeignLanguage_high = i;if(studForeignLanguage_low.m_Score.ForeignLanguage > studi.m_Score.ForeignLanguage)ForeignLanguage_low=i;/*不及格科目*/if(studi.m_Score.ForeignLanguage < 60)printf("ttt%-16s%

32、-15s%d Foren",studi.num,,studi.m_Score.ForeignLanguage);/*计算机最高和最低分的判断*/if(studComputer_high.m_Score.Computer < studi.m_Score.Computer)Computer_high = i;if(studComputer_low.m_Score.Computer > studi.m_Score.Computer)Computer_low=i;/*不及格科目*/if(studi.m_Score.Computer < 60)printf

33、("ttt%-16s%-15s%d Compn",studi.num,,studi.m_Score.Computer);printf("tttthere are %d records.n",n*4); /*总共记录数*/ printf("tttthe Physics hignest score:n"); /*物理最高分*/ printf("tttnumber:%s name:%s score:%dn",studPhysics_high.num,studPhysics_,stud

34、Physics_high.m_Score.Physics); printf("tttthe Mathematics hignest score:n"); /*数学最高分*/ printf("tttnumber:%s name:%s score:%dn",studMathematics_high.num,studMathematics_,studMathematics_high.m_Score.Mathematics); printf("tttthe Foreign Language hignest score:n")

35、; /*外语最高分*/ printf("tttnumber:%s name:%s score:%dn",studForeignLanguage_high.num,studForeignLanguage_,studForeignLanguage_high.m_Score.ForeignLanguage); printf("tttthe Computer hignest score:n"); /*计算机最高分*/ printf("tttnumber:%s name:%s score:%dn",studComputer_h

36、igh.num,studComputer_,studComputer_high.m_Score.Computer); printf("nn");printf("tttthe Physics lowest score:n"); /*物理最低分*/ printf("tttnumber:%s name:%s score:%dn",studPhysics_low.num,studPhysics_,studPhysics_low.m_Score.Physics);printf("tttthe Mathematics lowest score:n"); /*数学最低分*/ printf("tttnumber:%s name:%s score:%dn",studMathematics_low.num,studMathematics_,stud