学生成绩管理系统毕业论文c语言

#include #include

#include #define MAX 1000/*定义学生成绩信息结构*/struct stu{

char id[8];char name[8];

扩展资料：

short：修饰int，短整型数据，可省略被修饰的int。（K&R时期引入）

long：修饰int，长整型数据，可省略被修饰的int。（K&R时期引入）

long long：修饰int，超长整型数据，可省略被修饰的int。（C99标准新增）

signed：修饰整型数据，有符号数据类型。（C89标准新增）

unsigned：修饰整型数据，无符号数据类型。（K&R时期引入）

restrict:用于限定和约束指针，并表明指针是访问一个数据对象的唯一且初始的方式。（C99标准新增）

复杂类型关键字

struct：结构体声明。（K&R时期引入）

union：联合体声明。（K&R时期引入）

enum：枚举声明。（C89标准新增）

typedef：声明类型别名。（K&R时期引入）

sizeof：得到特定类型或特定类型变量的大小。（K&R时期引入）

inline:内联函数用于取代宏定义，会在任何调用它的地方展开。（C99标准新增）

参考资料来源：百度百科-c语言

看你要做多好了。简单的就是成绩录入与查询，角色大概分为教师、学生、管理员。想做NB的，不仅是成绩录入与输出，还可以做查询统计报表，对各个成绩段、年级段、时间段等条件进行统计，生成柱状图饼状图，对于老师成绩上传发出过期提醒等等人性化操作。。

#include /*引用库函数*/ #include #include #include typedef struct /*定义结构体数组*/ { char num[10]; /*学号*/ char name[20]; /*姓名*/ int score; /*成绩*/ }Student; Student stu[80]; /*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("\t\t****Students' Grade Management System****\n"); /*菜单选择*/ printf("\t\t | 1. Input Records |\n"); printf("\t\t | 2. Display All Records |\n"); printf("\t\t | 3. Sort |\n"); printf("\t\t | 4. Insert a Record |\n"); printf("\t\t | 5. Delete a Record |\n"); printf("\t\t | 6. Query |\n"); printf("\t\t | 7. Statistic |\n"); printf("\t\t | 8. Add Records from a Text File|\n"); printf("\t\t | 9. Write to a Text file |\n"); printf("\t\t | 0. Quit |\n"); printf("\t\t*****************************************\n"); printf("\t\t\tGive your Choice(0-9):"); c=getchar(); /*读入选择*/ }while(c<'0'||c>'9'); 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,x[10]; /*x[10]为清除多余的数据所用*/ while(sign!='n'&&sign!='N') /*判断*/ { printf("\t\t\tstudent's num:"); /*交互输入*/ scanf("\t\t\t%s",stud[n+i].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n+i].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n+i].score); gets(x); /*清除多余的输入*/ printf("\t\t\tany more records?(Y/N)"); scanf("\t\t\t%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("\t\t\t-----------------------------------\n"); /*格式头*/ printf("\t\t\tnumber name score\n"); printf("\t\t\t-----------------------------------\n"); for(i=1;i1&&i%10==0) /*每十个暂停*/ {printf("\t\t\t-----------------------------------\n"); /*格式*/ printf("\t\t\t"); system("pause"); printf("\t\t\t-----------------------------------\n"); } } printf("\t\t\t"); system("pause"); } void Sort_by_num(Student stud[],int n) /*按学号排序*/ { int i,j,*p,*q,s; char t[10]; for(i=0;i0) {strcpy(t,stud[j+1].num); strcpy(stud[j+1].num,stud[j].num); strcpy(stud[j].num,t); strcpy(t,stud[j+1].name); strcpy(stud[j+1].name,stud[j].name); strcpy(stud[j].name,t); p=&stud[j+1].score; q=&stud[j].score; s=*p; *p=*q; *q=s; } } int Insert_a_record(Student stud[],int n) /*插入一条记录*/ {char x[10]; /*清除多余输入所用*/ printf("\t\t\tstudent's num:"); /*交互式输入*/ scanf("\t\t\t%s",stud[n].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n].score); gets(x); n++; Sort_by_num(stud,n); /*调用排序函数*/ printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/ return(n); } int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/ { char s[20]; int i=0,j; printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/ scanf("%s",s); while(strcmp(stud[i].name,s)!=0&&istud[i].score) j=i; if(stud[k].score /*引用库函数*/#include#include#includetypedef struct /*定义结构体数组*/{ char num[10]; /*学号*/ char name[20]; /*姓名*/ int score; /*成绩*/}Student;Student stu[80]; /*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("\t\t****Students' Grade Management System****\n"); /*菜单选择*/ printf("\t\t | 1. Input Records |\n"); printf("\t\t | 2. Display All Records |\n"); printf("\t\t | 3. Sort |\n"); printf("\t\t | 4. Insert a Record |\n"); printf("\t\t | 5. Delete a Record |\n"); printf("\t\t | 6. Query |\n"); printf("\t\t | 7. Statistic |\n"); printf("\t\t | 8. Add Records from a Text File|\n"); printf("\t\t | 9. Write to a Text file |\n"); printf("\t\t | 0. Quit |\n"); printf("\t\t*****************************************\n"); printf("\t\t\tGive your Choice(0-9):"); c=getchar(); /*读入选择*/ }while(c<'0'||c>'9'); 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,x[10]; /*x[10]为清除多余的数据所用*/while(sign!='n'&&sign!='N') /*判断*/{ printf("\t\t\tstudent's num:"); /*交互输入*/ scanf("\t\t\t%s",stud[n+i].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n+i].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n+i].score); gets(x); /*清除多余的输入*/ printf("\t\t\tany more records?(Y/N)"); scanf("\t\t\t%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("\t\t\t-----------------------------------\n"); /*格式头*/printf("\t\t\tnumber name score\n");printf("\t\t\t-----------------------------------\n");for(i=1;i1&&i%10==0) /*每十个暂停*/ {printf("\t\t\t-----------------------------------\n"); /*格式*/ printf("\t\t\t"); system("pause"); printf("\t\t\t-----------------------------------\n"); }}printf("\t\t\t");system("pause");}void Sort_by_num(Student stud[],int n) /*按学号排序*/{ int i,j,*p,*q,s; char t[10]; for(i=0;i0) {strcpy(t,stud[j+1].num); strcpy(stud[j+1].num,stud[j].num); strcpy(stud[j].num,t); strcpy(t,stud[j+1].name); strcpy(stud[j+1].name,stud[j].name); strcpy(stud[j].name,t); p=&stud[j+1].score; q=&stud[j].score; s=*p; *p=*q; *q=s; }}int Insert_a_record(Student stud[],int n) /*插入一条记录*/{char x[10]; /*清除多余输入所用*/ printf("\t\t\tstudent's num:"); /*交互式输入*/ scanf("\t\t\t%s",stud[n].num); printf("\t\t\tstudent's name:"); scanf("\t\t\t%s",stud[n].name); printf("\t\t\tstudent's score:"); scanf("\t\t\t%d",&stud[n].score); gets(x); n++; Sort_by_num(stud,n); /*调用排序函数*/ printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/ return(n);}int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/{ char s[20]; int i=0,j; printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/ scanf("%s",s); while(strcmp(stud[i].name,s)!=0&&istud[i].score) j=i; if(stud[k].score

#include #include #include #define MAX 1000/*定义学生成绩信息结构*/struct stu{ char id[8]; char name[8]; double Chinese; double Math; double English; double average; double total;};/*学生结构数组，用于存储学生成绩信息*/struct stu students[MAX];/*当前学生人数*/int current;void input(){ int i; printf("请输入学生人数："); scanf("%d", & current); for (i = 0; i < current; i++) { printf("\n请输入学生学号，最多为7位数: "); scanf("%s", students[i].id); printf("请输入学生姓名："); scanf("%s", students[i].name); printf("请输入语文成绩："); scanf("%lf", &students[i].Chinese); printf("请输入数学成绩："); scanf("%lf", &students[i].Math); printf("请输入英语成绩："); scanf("%lf", &students[i].English); students[i].total = students[i].Chinese + students[i].Math + students[i].English; students[i].average = students[i].total / 3; }}/*排名次，即对学生结构数组排序*/void sort(struct stu array[], int n){ int i, j; struct stu temp; for (i = 0; i < n; i++) { for (j = i+1; j < n; j++) { if (array[i].average - array[j].average < 1e-16) { temp = array[i]; array[i] = array[j]; array[j] = temp; } } }}/*统计平均成绩，并输出各分数段的人数*/void print_score(struct stu array[], int n){ int i; double ave = 0; int sum1 = 0, sum2 = 0, sum3 = 0, sum4 = 0; for (i = 0; i < n; i++) { ave += array[i].average; switch ((int)(array[i].average / 10)) { case 10: case 9: sum1++; break; case 8: sum2++; break; case 7: case 6: sum3++; break; default: sum4++; } } printf("全班的平均分为：%.1f\n", ave/n); printf("平均分在90分以上的人数为：%d\n", sum1); printf("平均分在80~89的人数为：%d\n", sum2); printf("平均分在60~79的人数为：%d\n", sum3); printf("平均分在60分以下的人数为：%d\n", sum4);}/*输出不及格科目及学生名单*/void print_unreach(struct stu array[], int n){ int i; printf("科目\t学号\t名字\n"); for (i = 0; i < n; i++) { if (array[i].Chinese < 60) { printf("语文\t%s\t%s\n", array[i].id, array[i].name); } if (array[i].Math < 60) { printf("数学\t%s\t%s\n", array[i].id, array[i].name); } if (array[i].English < 60) { printf("英语\t%s\t%s\n", array[i].id, array[i].name); } }}/*打印优等生名单*/void print_good(struct stu array[], int n){ int i; char mark = 0; if (n > 3) { n = 3; } printf("学号\t姓名\t语文\t数学\t英语\t平均分\t名次\n"); for (i = 0; i < n; i++) { if ((array[i].Chinese > 60) && (array[i].Math > 60) && (array[i].English > 60)) { if (array[i].average > 90) mark = 1; else if (array[i].average > 85) { if (array[i].Chinese == 100) mark = 1; if (array[i].Math == 100) mark = 1; if (array[i].English == 100) mark = 1; if (array[i].Chinese > 95 && array[i].English > 95) mark = 1; if (array[i].Chinese > 95 && array[i].Math > 95) mark = 1; if (array[i].Math > 95 && array[i].English > 95) mark = 1; } if (mark == 1) { printf("%s\t%s\t", array[i].id, array[i].name); printf("%.f\t%.f\t%.f\t%.1f\t", array[i].Chinese, array[i].Math, array[i].English, array[i].average); printf("%d\n", i+1); } } }}/*按学生姓名查询成绩*/void search_name(struct stu array[], int n, char* name){ int i; char mark = 1; for (i = 0; i < n; i++) { if (strcmp(name, array[i].name) == 0) { printf("学生姓名：%s\n", name); printf("学生学号：%s\n", array[i].id); printf("语文：%.f\n", array[i].Chinese); printf("数学：%.f\n", array[i].Math); printf("英语：%.f\n", array[i].English); printf("平均分：%.1f\n", array[i].average); mark = 0; } } if (mark == 1) puts("不存在该学生记录");}/*按学生学号查询成绩*/void search_id(struct stu array[], int n, char* id){ int i; char mark = 1; for (i = 0; i < n; i++) { if (strcmp(id, array[i].id) == 0) { printf("学生姓名：%s\n", array[i].name); printf("学生学号：%s\n", array[i].id); printf("语文：%.f\n", array[i].Chinese); printf("数学：%.f\n", array[i].Math); printf("英语：%.f\n", array[i].English); printf("平均分：%.1f\n", array[i].average); mark = 0; break; } } if (mark == 1) puts("不存在该学生记录");}void print_menu(){ system("cls"); printf("1.输入学生信息\n"); puts("2.统计全班学生成绩"); puts("3.按学号查询学生成绩"); puts("4.按姓名查询学生成绩"); puts("5.输出不及格情况"); puts("6.输出优等生名单"); puts("0.退出本程序"); printf("\n\n 请输入你的选择：");}int main(int argc, char **argv){ char ch = 0; char id[8], name[8]; while (ch != '0') { print_menu(); ch = getchar(); switch (ch) { case '1': { system("cls"); input(); sort(students, current); break; } case '2': { system("cls"); print_score(students, current); break; } case '3': { system("cls"); printf("请输入学号："); scanf("%s", id); search_id(students, current, id); break; } case '4': { system("cls"); printf("请输入姓名："); scanf("%s", name); search_name(students, current, name); break; } case '5': { system("cls"); print_unreach(students, current); break; } case '6': { system("cls"); print_good(students, current); break; } case '0': exit(0); } printf("\n\n按任意键返回主菜单……"); getchar(); getchar(); } return 0;}

作业吧，还是自己写吧。程序是自己编会的。

能实现你的所有要求的！在支持中文DOS的环境下试！#ifndef H_STUDENT_HH /*xxx如果没有定义xxx*/#define H_STUDENT_HH /*xxx定义xx*/#include "stdio.h"#include "string.h"#include "malloc.h"#define LEN sizeof(struct message_student) /*一个结构体数组元素的长度*/#define numsubs 5 /*学科数目*/typedef struct message_student /*结构体定义*/{ char number[6]; char name[20]; char sex[4]; float subject[numsubs]; float score; float average; int index;}student;extern int numstus; /*学生数目*/extern student *pointer; /*指向结构体数组*/extern int lens;int menu_select(); /*函数声明*/int openfile(student stu[]);int findrecord(student stud[]);int writetotext(student stud[]);void welcome();void display1();void showtable();void sort(student stu[]); void deleterecord(student stu[],int i);void addrecord(student stud[]);void display(student stud[],int n1,int n2);void amendrecord(student stud[]);void count(student stud[]);void sortnum(student stud[]);void sortnum2(student stud[]);void sortname(student stud[]);void sortname2(student stud[]);void sortcount(student stud[]);void sortcount2(student stud[]);void statistic(student stud[]);void display1();#endif#include "stdio.h"int menu_select() { char c; printf("\n\n"); printf(" | 1. 增加学生记录 5.统计信息 |\n"); printf(" | 2. 查询学生记录 6.打开文件 |\n"); printf(" | 3. 修改学生记录 7.保存文件 |\n"); printf(" | 4. 学生纪录排序 8.显示记录 |\n"); printf(" | 0.退出系统 |\n"); printf("\n\n"); printf("请选择(0-8):"); c=getchar(); getchar(); return (c-'0');}#include "stdio.h"int findrecord(student stud[]) /*查找信息*/{ char str[2]; int i,num; if(numstus==0) { printf("没有可被查找的记录\n"); return -1; } else { printf("以何种方式查找？\n1.学号\t2.姓名\t3.名次\n"); gets(str); if(str[0]=='1') /*按学号查找*/ { printf("请输入学号:"); gets(str); for(i=0;i<=numstus;i++) if(strcmp(str,stud[i].number)==0) { display(stud,i,i); break; } else continue; } else if(str[0]=='2') /*按姓名查找*/ { printf("请输入姓名:"); gets(str); for(i=0;i<=numstus;i++) if(strcmp(str,stud[i].name)==0) { display(stud,i,i); break; } else continue; } else if(str[0]=='3') /*按名次查找*/ { printf("请输入名次:"); scanf("%d",&num); getchar(); for(i=0;i<=numstus;i++) if(num==stud[i].index) { display(stud,i,i); break; } else continue; } if(i>numstus) { printf("没有查找所要的信息。\n"); return -1; } return i; }}#include"stdio.h"int openfile(student stu[]){ int i=0,j; FILE *fp; char filename[20],str[2]; if(numstus!=0) { printf("已经有记录存在，是否保存?(y/n)"); gets(str); if(str[0]=='y'||str[0]=='Y') writetotext(stu); } printf("请输入文件名:"); gets(filename); numstus=0; if((fp=fopen(filename,"rb+"))==NULL) { printf("无法打开该文件\n"); return(-1); } fscanf(fp,"%d",&numstus); fgetc(fp); while(i0) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } } void sortnum2(student stud[]) { int i,j; student temp; student *p; p=stud; for(i=0;i0) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } } void sortname(student stud[]) { int i,j; student temp; student *p; p=stud; for(i=0;i0) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } } void sortname2(student stud[]) { int i,j; student temp; student *p; p=stud; for(i=0;i0) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } } void sortcount(student stud[]) { int i,j; student temp; student *p; p=stud; for(i=0;istud[j].index) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } } void sortcount2(student stud[]) { int i,j; student temp; student *p; p=stud; for(i=0;istud[j+1].index) { temp=*(p+j); *(p+j)=*(p+j+1); *(p+j+1)=temp; } } }#include"stdio.h"void statistic(student stud[]) /*新增功能，输出统计信息*/{ int i,j=0,k=0; char c1,str[2]; float average[numsubs],sum=0; if(numstus==0) printf("没有可被查找的记录\n"); else { while(1) { printf("下面将统计考试成绩\n"); printf("请选择你要统计哪科的成绩 1.A\t2.B\t3.C\t4.D\t5.E\n"); c1=getchar(); printf("\t一共有个%d记录\n",numstus); /*总共记录数*/ switch(c1) { case '1': for(i=0;istud[i].subject[0]) k=i; if(stud[j].subject[0]stud[i].subject[1]) k=i; if(stud[j].subject[1]stud[i].subject[2]) k=i; if(stud[j].subject[2]stud[i].subject[3]) k=i; if(stud[j].subject[3]stud[i].subject[4]) k=i; if(stud[j].subject[4]void amendrecord(student stud[]){ char str[5]; /*供用户输入*/ int i=-1,j; if(numstus==0) /*没有记录返回*/ printf("没有可供修改的记录！"); while(i<0) { i=findrecord(stud); if(i>=0) { printf("要删除这个学生的信息吗?(y/n)"); gets(str); if(str[0]=='y'||str[0]=='Y') { deleterecord(stud,i); count(stud); } else { printf("确定要修改这个学生的信息吗?(y/n)"); gets(str); if(str[0]=='y'||str[0]=='Y') { printf("下面请重新输入学生的信息:\n"); printf("请输入学号:"); gets(stud[i].number); printf("请输入姓名:"); gets(stud[i].name); printf("请输入性别(男/女 1/0):"); gets(str); if(str[0]=='0') strcpy(stud[i].sex,"女"); else strcpy(stud[i].sex,"男"); stud[i].score=0; printf("请按顺序输入成绩:"); for(j=0;j=0) { for(j=i;jstud[i].score) stud[i].index++; }}#include "stdio.h"void addrecord(student stud[]){ int i=0,j,num; char str[5]; if(numstus!=0) { printf("已有记录存在是否覆盖?(y/n)\n"); gets(str); if(str[0]=='Y'||str[0]=='y') i=0; else i=numstus; } printf("请输入增加的学生信息条目数:"); scanf("%d",&num); if(i==0) numstus=num; else numstus+=num; if(numstus>lens) { lens+=50; pointer=(student *)realloc(pointer,lens*LEN); } printf("请输入学生信息:\n"); for(;i0) { i=menu_select(); /*控制菜单*/ switch(i) { case 1:addrecord(pointer);break; /*增加学生信息*/ case 2:findrecord(pointer);break; /*查询学生信息*/ case 3:amendrecord(pointer);break; /*修改学生信息*/ case 4:sort(pointer);break; /*学生信息排序*/ case 5:statistic(pointer);break; /*统计信息*/ case 6:openfile(pointer);break; /*打开文件*/ case 7:writetotext(pointer);break; /*保存文件*/ case 8:display(pointer,0,numstus-1);break; /*显示记录*/ case 0: if(numstus!=0) printf("是否保存当前记录?(y/n)"); gets(str); if(str[0]=='y'||str[0]=='Y') writetotext(pointer); i=-1;break; /*退出系统*/ default:printf("请输入数字0~8:\n");i=1; /*输入错误*/ } } printf("\t\t======欢迎再次使用本系统======= \n"); display1();}