学生成绩管理系统（C语言）C语言课程设计报告一、实践的目的和要求加深对《C语言程序设计》课程所学知识的理解，进一步巩固C语言讲法规则。
学会编制结构清晰、风格良好、数据结构适当的C语言程序，从而具备解决综合性实际问题的能力二、实践内容在熟练掌握C语言的基本知识：数据类型（整形、实型、字符型、指针、数组、结构等）；运算类型（算术运算、逻辑运算、自增自减运算、赋值运算等）；程序结构（顺序结构、判断选择结构、循环结构）；函数的使用，结构体和文件的操作等。
三、设计说明学生成绩管理系统建立一个学生成绩管理系统。
程序运行时显示一个简单的菜单。
例如：1.信息输入（INPUT）2.信息的删除与修改3.显示当前学生成绩的记录信息，若无记录，则给出提示信息4.学生或者各个班级各门课程总分、平均分、最低分、最高分等的统计5.可以按照班级、姓名、性别、分数(可以有区间)等方式进行查询6.具有良好的交互功能7.能使用图形函数进行简单的界面设计8.具有良好的纠错功能9.退出等等程序：#include <stdio.h> /*文件操作（读文件）*/#include<dos.h>#include<stdlib.h> /*其它说明*/#include<string.h> /*字符串函数*/#include<mem.h> /*内存操作函数*/#include<conio.h> /*屏幕操作函数*/#include<ctype.h> /*字符操作函数*/#include<alloc.h> /*动态地址分配函数*/#include<time.h>#define LEN sizeof(STUDENT)#define N 3typedef struct stu /*定义结构体数组用于缓存数据*/{char grade[6];char name[5];char sex[4] ;int score[N];int sum;float average;int order;struct stu *next;}STUDENT;/*以下是函数原型*/STUDENT *init(); /*初始化函数*/STUDENT *create(); /*创建链表*/STUDENT *delete(STUDENT *head); /*删除记录*/STUDENT *sort(STUDENT *head); /*按平均分排序*/void print(STUDENT *head); /* 显示所有记录*/void name(STUDENT *head); /*姓名查找*/void grade(STUDENT *head); /*班级查找*/void sex(STUDENT *head); /*性别查找*/void average(STUDENT *head); /*按平均分查找在那个分数里*/STUDENT *statistciam(STUDENT *head);/*统计记录*/void save(STUDENT *head); /*保存文件*/STUDENT *load(); /*读文件*/STUDENT *insert(STUDENT *head,STUDENT *new); /*插入记录*/int menu_select(); /*菜单函数*/int menu_search(); /*查询菜单*/void code(); /*密码验证*//*主函数界面*/main(){int i,j,n,m;STUDENT *head,new; /*链表定义头指针*/randomize();/*开启扬声器，发出声音*/while(!bioskey(1)){j=rand()*5000;sound(j);delay(10);}nosound();/*关闭声音文件*/code();/*密码输入*/clrscr(); /*清屏*/for(;;) /*无限循环*/{switch(menu_select()) /*调用主菜单函数，返回值整数作开关语句的条件*/{ /*值不同，执行的函数不同，break 不能省略*/case 0:head=init();break; /*执行初始化*/case 1:head=create();break; /*创建链表*/case 2:head=delete(head);break; /*删除记录*/case 3:print(head);break; /*显示全部记录*/case 4:loop:printf("sreach:\n 1.grade\n \n 3.sex\n 4.average\n 5.quit\n Enter you choice(0~5):");scanf("%d",&n);switch(n){case 1:grade(head);goto loop;case 2:name(head);goto loop;case 3:sex(head);goto loop;case 4:average(head);goto loop;case 5: break;}break;/*查找记录*/case 5:sort(head);break; /*排序*/case 6:save(head);break; /*保存文件*/case 7:head=load(); break; /*读文件*/case 8:head=insert(head,&new); break; /*插入记录*/case 9:head=statistciam(head); break; /*统计记录*/case 10:exit(0); /*如菜单返回值为10程序结束*/}}}/*密码输入*/void code(){int i;char number[20];const w=10;printf("\n\t\t\t--------------------------------------------------");printf("\n\t\t\tBecause this system is busywork,Code is: 123456");printf("\n\t\t\t----------------------------------------------- ");printf("\n");printf("\n");printf("\n");printf("\n");printf("\n");printf("\n");printf("\n\t*********************************");printf("\n\t Please Enter The Code : ");printf("\n\t*********************************\n");scanf("%s",number);printf("\n\t\t\tExamining!");for(i=0;i<=w;i++){printf("*");}if(strcmp(number,"123456")==0){printf("\n\t\t\tCode is right！press any key enter menu......");clrscr();}else{printf("\n\t\t\tCode is wrong!Please enter again : ");clrscr();code();}}/*初始化函数*/STUDENT *init(){return NULL; /*返回空指针*/}/*菜单选择函数*/menu_select(){char *menu[]={"********************************************", " Welcome to "," The student score manage system!","*****************MENU***********************", /*定义菜单字符串数组*/" 0. Init list", /*初始化*/" 1. Input list", /*输入记录*/" 2. Delete a record from list", /*从表中删除记录*/" 3. Print list ", /*显示当前学生成绩的记录信息*/" 4. Search record ", /*查询学生记录*/" 5. Sort to make new a file ", /*排序*/" 6. Save the file", /*将单链表中记录保存到文件中*/" 7. Load the file", /*从文件中读入记录*/" 8. insert record to list ", /*插入记录到表中*/" 9. statistciam record to list ", /*统计记录到表中*/" 10. Quit", /*退出*/"********************************************"," Producer:ZengWenyan ZhaoJingxiu "," Faculty Adviser:XiaoFengrui ",}; /*退出*/char s[3]; /*以字符形式保存选择号*/int c,i; /*定义整形变量*/textbackground(MAGENTA); /*设置背景颜色为粉色*/gotoxy(1,50); /*移动光标*/printf("press any key enter menu......\n"); /*压任一键进入主菜单*/getch(); /*输入任一键*/clrscr(); /*清屏幕*/gotoxy(1,1); /*移动光标*/textcolor(YELLOW); /*设置文本显示颜色为黄色*/textbackground(BLUE); /*设置背景颜色为蓝色*/gotoxy(15,2); /*移动光标*/putch(0xc9); /*输出左上角边框┏*/for(i=1;i<44;i++)putch(0xcd); /*输出上边框水平线*/putch(0xbb); /*输出右上角边框┓*/for(i=3;i<23;i++){gotoxy(15,i);putch(0xba); /*输出左垂直线*/gotoxy(59,i);putch(0xba);} /*输出右垂直线*/gotoxy(15,22);putch(0xc8); /*输出左上角边框┗*/for(i=1;i<44;i++)putch(0xcd); /*输出下边框水平线*/putch(0xbc); /*输出右下角边框┛*/window(16,3,58,21); /* 制作显示菜单的窗口，大小根据菜单条数设计*/clrscr(); /*清屏*/for(i=0;i<18;i++) /*输出主菜单数组*/{gotoxy(1,i+1);cprintf("%s",menu[i]);}textbackground(BLACK); /*设置背景颜色为黑色*/window(1,1,80,25); /*恢复原窗口大小*/gotoxy(10,23); /*移动光标*/do{printf("\n Enter you choice(0~10):"); /*在菜单窗口外显示提示信息*/scanf("%s",s); /*输入选择项*/c=atoi(s); /*将输入的字符串转化为整形数*/}while(c<0||c>10); /*选择项不在0~10之间重输*/return c; /*返回选择项，主程序根据该数调用相应的函数*/}/*输入函数*/STUDENT *create(){int i,s;STUDENT *head=NULL,*p; /* 定义函数.此函数带回一个指向链表头的指针*/clrscr();textbackground(MAGENTA);textcolor(BLUE);for(;;){p=(STUDENT *)malloc(LEN); /*开辟一个新的单元*/if(!p) /*如果指针p为空*/{printf("\nOut of memory."); /*输出内存溢出*/return (head); /*返回头指针,下同*/}printf("Enter the grade(0:list end):");scanf("%s",p->grade);if(p->grade[0]=='0') break; /*如果班级首字符为0则结束输入*/printf("Enter the name:");scanf("%s",p->name);do{printf("Enter the sex(M or W):");scanf("%s",&p->sex[0]);if(p->sex[0]!='M'&&p->sex[0]!='W')printf("Data error,please enter again.\n");}while(p->sex[0]!='M'&&p->sex[0]!='W');printf("Please enter the %d scores\n",3); /*提示开始输入成绩*/s=0; /*计算每个学生的总分，初值为0*/for(i=0;i<N;i++) /*3门课程循环3次*/{do{printf("score%d:",i+1);scanf("%d",&p->score[i]);if(p->score[i]<0 || p->score[i]>100) /*确保成绩在0~100之间*/printf("Data error,please enter again.\n");}while(p->score[i]<0 || p->score[i]>100);s=s+p->score[i]; /*累加各门成绩*/}p->sum=s; /*将总分保存*/p->average=(float)s/3; /*先用强制类型转换将s转换成float 型,再求平均值*/p->order=0; /*未排序前此值为0*/p->next=head; /*将头结点做为新输入结点的后继结点*/head=p; /*新输入结点为新的头结点*/}return(head);}/*删除记录函数*/STUDENT *delete(STUDENT *head){int n;STUDENT *p1,*p2; /*p1为查找到要删除的结点指针，p2为其前驱指针*/char c,s[6]; /*s[6]用来存放班级,c用来输入字母*/clrscr();textbackground(MAGENTA);textcolor(BLUE);printf("Please enter the deleted grade: ");scanf("%s",s);p1=p2=head; /*给p1和p2赋初值头指针*/while(strcmp(p1->grade,s) && p1 != NULL) /*当记录的班级不是要找的，或指针不为空时*/{p2=p1; /*将p1指针值赋给p2作为p1的前驱指针*/ p1=p1->next; /*将p1指针指向下一条记录*/}if(strcmp(p1->grade,s)==0) /*班级找到了*/{printf("**************************************FOUND******** ****************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4.2f | %-5d |\n", p1->grade,p1->name,p1->score[0],p1->score[1],p1->score [2],p1->sum,p1->average,p1->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");printf("Are you sure to delete the student Y/N ?"); /*提示是否要删除,输入Y删除,N则退出*/for(;;){scanf("%c",&c);if(c=='n'||c=='N') break; /*如果不删除,则跳出本循环*/if(c=='y'||c=='Y'){if(p1==head) /*若p1==head，说明被删结点是首结点*/ head=p1->next; /*把第二个结点地址赋予head*/elsep2->next=p1->next; /*否则将一下结点地址赋给前一结点地址*/n=n-1;printf("\nNum %s student have been deleted.\n",s);printf("Don't forget to save.\n");break; /*删除后就跳出循环*/}}}elseprintf("\nThere is no num %s student on the list.\n",s); /*找不到该结点*/return(head);}/* 显示全部记录函数*/void print(STUDENT *head){int i=0; /* 统计记录条数*/STUDENT *p; /*移动指针*/clrscr();textbackground(MAGENTA);textcolor(BLUE);p=head; /*初值为头指针*/printf("\n************************************STUDENT******* *****************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Rec | Grade | Name | Sc1 | Sc2 | Sc3 | Sum | Ave | Order |\n");printf("-------------------------------------------------------------------------------\n");while(p!=NULL){i++;printf("| %3d | %4s | %-4s | %3d | %3d | %3d | %3d | %4.2f| %-5d |\n",i,p->grade,p->name,p->score[0],p->score[1],p->score[2],p->su m,p->average,p->order);p=p->next;}printf("-------------------------------------------------------------------------------\n");printf("**************************************END************* *************************\n");}/*姓名查找记录函数*/void name(STUDENT *head){STUDENT *p; /* 移动指针*/char s[5]; /*存放姓名用的字符数组*/clrscr();textbackground(MAGENTA);textcolor(BLUE);printf("Please enter name for searching.\n");scanf("%s",s);p=head; /*将头指针赋给p*/while(strcmp(p->name,s) && p != NULL) /*当记录的姓名不是要找的，或指针不为空时*/p=p->next; /*移动指针，指向下一结点*/if(p!=NULL) /*如果指针不为空*/{printf("\n*************************************FOUND******* *****************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4 .2f | %-5d|\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseprintf("\nThere is no name %s student on the list.\n",s); /*显示没有该学生*/}/*班级查找记录函数*/void grade(STUDENT *head){STUDENT *p; /* 移动指针*/char s[6]; /*存放班级用的字符数组*/clrscr();textbackground(MAGENTA);textcolor(BLUE);printf("Please enter grade for searching.\n");scanf("%s",s);p=head; /*将头指针赋给p*/while(strcmp(p->grade,s) && p != NULL) /*当记录班级不是要找的，或指针不为空时*/p=p->next; /*移动指针，指向下一结点*/if(p!=NULL) /*如果指针不为空*/{printf("\n*************************************FOUND******* *****************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseprintf("\nThere is no grade %s student on the list.\n",s); /*显示没有该学生*/}/*性别查找记录函数*/void sex(STUDENT *head){STUDENT *p; /* 移动指针*/char s[4]; /*存放性别用的字符数组*/clrscr();textbackground(MAGENTA);textcolor(BLUE);printf("Please enter sex for searching.\n");scanf("%s",s);p=head; /*将头指针赋给p*/while(strcmp(p->sex,s) && p != NULL) /*当记录的性别不是要找的，或指针不为空时*/p=p->next; /*移动指针，指向下一结点*/if(p!=NULL) /*如果指针不为空*/{printf("\n*************************************FOUND******* *****************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseprintf("\nThere is no sex %s student on the list.\n",s); /*显示没有该学生*/}/* 用平均分进行分数段查找 */void average(STUDENT *head){STUDENT *p; /* 移动指针*/clrscr();textbackground(MAGENTA);textcolor(BLUE);p=head; /*将头指针赋给p*/if(p!=NULL&&p->average<60&&p->average>0) /*如果指针不为空且平均分在0-60之间*/{printf("\n**********************************notpass************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseif(p!=NULL&&p->average<70&&p->average>=60) /*如果指针不为空且平均分在60-70之间*/{printf("\n**********************************60-70************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}else if(p!=NULL&&p->average<80&&p->average>=70) /*如果指针不为空且平均分在70-80之间*/{printf("\n**********************************70-80************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseif(p!=NULL&&p->average<90&&p->average>=80) /*如果指针不为空且平均分在80-90之间*/{printf("\n**********************************80-90************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | % 4.2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}else if(p!=NULL&&p->average<100&&p->average>=90) /*如果指针不为空且平均分在90-100之间*/{printf("\n**********************************90-100************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Grade | Name | sc1 | sc2 | sc3 | Sum | Av e | Order |\n");printf("-------------------------------------------------------------------------------\n");printf("| %4s | %4s | %3d | %3d | %3d | %3d | %4 .2f | %-5d |\n",p->grade,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);printf("-------------------------------------------------------------------------------\n");printf("***************************************END************ **************************\n");}elseprintf("\nThere is not average student on the list.\n"); /*显示没有该学生*/}/*保存数据到文件函数*/void save(STUDENT *head){FILE *fp; /*定义指向文件的指针*/STUDENT *p; /* 定义移动指针*/char outfile[10];printf("Enter outfile name,for example c:\\score\n");scanf("%s",outfile);if((fp=fopen(outfile,"wb"))==NULL) /*为输出打开一个二进制文件,为只写方式*/{printf("Cannot open the file\n");return; /*若打不开则返回菜单*/}printf("\nSaving the file......\n");p=head; /*移动指针从头指针开始*/while(p!=NULL) /*如p不为空*/{fwrite(p,LEN,1,fp); /*写入一条记录*/p=p->next; /*指针后移*/}fclose(fp); /*关闭文件*/printf("Save the file successfully!\n");}/* 从文件读数据函数*/STUDENT *load(){STUDENT *p1,*p2,*head=NULL; /*定义记录指针变量*/FILE *fp; /* 定义指向文件的指针*/char infile[10];printf("Enter infile name,for example c:\\score\n");scanf("%s",infile);if((fp=fopen(infile,"rb"))==NULL) /*打开一个二进制文件，为只读方式*/{printf("Can not open the file.\n");return(head);}printf("\nLoading the file!\n");p1=(STUDENT *)malloc(LEN); /*开辟一个新单元*/if(!p1){printf("Out of memory!\n");return(head);}head=p1; /*申请到空间，将其作为头指针*/while(!feof(fp)) /*循环读数据直到文件尾结束*/{if(fread(p1,LEN,1,fp)!=1) break; /*如果没读到数据，跳出循环*/p1->next=(STUDENT *)malloc(LEN); /*为下一个结点开辟空间*/if(!p1->next){printf("Out of memory!\n");return (head);}p2=p1; /*使p2指向刚才p1指向的结点*/p1=p1->next; /*指针后移，新读入数据链到当前表尾*/}p2->next=NULL; /*最后一个结点的后继指针为空*/fclose(fp);printf("You have success to read data from the file!\n");return (head);}/*按平均分排序函数*/STUDENT *sort(STUDENT *head){int i=0; /*保存名次*/STUDENT *p1,*p2,*t,*temp; /*定义临时指针*/temp=head->next; /*将原表的头指针所指的下一个结点作头指针*/head->next=NULL; /*第一个结点为新表的头结点*/ while(temp!=NULL) /*当原表不为空时，进行排序*/ {t=temp; /*取原表的头结点*/temp=temp->next; /*原表头结点指针后移*/p1=head; /*设定移动指针p1，从头指针开始*/p2=head; /*设定移动指针p2做为p1的前驱，初值为头指针*/while(t->average<p1->average&&p1!=NULL) /*作成绩平均分比较*/{p2=p1; /*待排序点值小，则新表指针后移*/p1=p1->next;}if(p1==p2) /*p1==p2，说明待排序点值大，应排在首位*/ {t->next=p1; /*待排序点的后继为p*/head=t; /*新头结点为待排序点*/}else /*待排序点应插入在中间某个位置p2和p1之间，如p为空则是尾部*/{t->next=p1; /*t的后继是p1*/p2->next=t; /*p2的后继是t*/}}p1=head; /*已排好序的头指针赋给p1，准备填写名次*/ while(p1!=NULL) /*当p1不为空时，进行下列操作*/{i++; /*结点序号*/p1->order=i; /*将结点序号赋值给名次*/p1=p1->next; /*指针后移*/}printf("Sorting is sucessful.\n"); /*排序成功*/return (head);}/*插入记录函数*/STUDENT *insert(STUDENT *head,STUDENT *new){STUDENT *p0,*p1,*p2;int n,sum1,i;p1=head; /*使p1指向第一个结点*/p0=new; /*p0指向要插入的结点*/printf("\nPlease enter a new record.\n"); /*提示输入记录信息*/printf("Enter the grade:");scanf("%s",new->grade);printf("Enter the name:");scanf("%s",new->name);do{printf("Enter the sex(M or W):");scanf("%s",&new->sex[0]);if(new->sex[0]!='M'&&new->sex[0]!='W')printf("Data error,please enter again.\n");}while(new->sex[0]!='M'&&new->sex[0]!='W');printf("Please enter the %d scores.\n",3);sum1=0; /*保存新记录的总分，初值为0*/for(i=0;i<3;i++){do{printf("score%d:",i+1);scanf("%d",&new->score[i]);if(new->score[i]>100||new->score[i]<0)printf("Data error,please enter again.\n");}while(new->score[i]>100||new->score[i]<0);sum1=sum1+new->score[i]; /*累加各门成绩*/}new->sum=sum1; /*将总分存入新记录中*/new->average=(float)sum1/3;new->order=0;if(head==NULL) /*原来的链表是空表*/{head=p0;p0->next=NULL;} /*使p0指向的结点作为头结点*/ else{while((p0->average<p1->average)&&(p1->next!=NULL)) {p2=p1; /*使p2指向刚才p1指向的结点*/p1=p1->next; /*p1后移一个结点*/}if(p0->average>=p1->average){if(head==p1)head=p0; /*插到原来第一个结点之前*/else p2->next=p0; /*插到p2指向的结点之后*/p0->next=p1;}else{p1->next=p0;p0->next=NULL;} /*插到最后的结点之后*/}n=n+1; /*结点数加1*/head=sort(head); /*调用排序的函数,将学生成绩重新排序*/printf("\nStudent %s have been inserted.\n",new->name);printf("Don't forget to save the new file.\n");return(head);}/*统计学生成绩函数*/STUDENT *statistciam(STUDENT *head){floatsum1=0,sum2=0,sum3=0,ave1=0,ave2=0,ave3=0,max=0,min;STUDENT *p;int x,y=0,i=0;p=head;printf("1.sum and average\n2.single of average\n3.max of sum\n4.min of sum\n");scanf("%d",&x);getchar();switch(x)/*用switch语句实现功能选择*/{case 1: if(head==NULL){printf("\n There are not anyone's information !\n");return(head);}/*链表为空*/else{printf("---------------------------------------------------------\n");printf("|Grade\t|Name\t|Sc1\t|Sc2\t|Sc3\t|Sum\t|Ave\t|\n");printf("---------------------------------------------------------\n");/*打印表格域*/while(p!=NULL){sum1=p->score[0]+p->score[1]+p->score[2]; /*计算个人总分*/ave1=sum1/3;/*计算个人平均分*/printf("|%s\t|%s\t|%.1d\t|%.1d\t|%.1d\t|%.1f\t|%.1f\t|\n",p-> grade,p->name,p->score[0],p->score[1],p->score[2],sum1,ave1);/*打印结果*/printf("---------------------------------------------------------\n");/*打印表格域*/p=p->next;}}return(head);case 2: if(head==NULL){printf("\nThere are not anyone's information !\n");return(head);}/*链表为空*/while(p!=NULL){sum1=sum1+p->score[0];sum2=sum2+p->score[1];sum3=sum3+p->score[2];/*计算总分*/y=y+1;ave1=sum1/y;ave2=sum2/y;ave3=sum3/y;/*计算平均分*/p=p->next;/*使p指向下一个结点*/}printf("score1 average is%.1f\n",ave1);printf("score2 average is%.1f\n",ave2);printf("score3 average is%.1f\n",ave3);/*打印结果*/return(head);case 3:if(head==NULL){printf("\nThere are not anyone's information !\n");return(head);}/*链表为空*/max=p->score[0]+p->score[1]+p->score[2];while(i<N){i=i+1;sum1=p->score[0]+p->score[1]+p->score[2]; /*计算个人总分*/if(max<sum1)max=sum1;p=p->next;}printf("max of sum:%.1f",max);printf("\n");return(head);case 4: if(head==NULL){printf("\nThere are not anyone's information !\n");return(head);}/*链表为空*/while(p!=NULL){min=p->score[0]+p->score[1]+p->score[2];while(p!=NULL){sum2=p->score[0]+p->score[1]+p->score[2];if(min>sum2)min=sum2;p=p->next;}}printf("min of sum:%.1f",min);printf("\n");return(head);default :printf("Data error,please enter again!\n"); }return(head);}。
