C语言学生成绩管理系统设计-优快云博客

本文链接：https://blog.youkuaiyun.com/cheng_zhi123/article/details/134341313
程序运行结果截图示例如下各图。
图1 程序运行目录界面
图2 程序查询模块1界面
图3 程序查询模块2界面
图4 程序查询模块3界面
图5 程序查询模块4界面
图6 程序查询模块5界面
图7 程序查询模块6界面
图8 程序更改模块1界面
图9 程序更改模块2界面
图10 程序更改模块3界面
图11 程序计算模块1界面
图12 程序计算模块2界面
图13 程序排序模块1界面
图14 程序排序模块2界面
图15 程序输入错误界面
图16 程序输入界面
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

//菜单函数声明
int menu(void);
int printmenu();
int foundmenu();
int celemenu();
int revisemenu();
int rankmenu();
int infomenu();

//系统主菜单
int menu()
{

	int menusele;
	printf("\n\n");
    printf("\t ---------------------- \n");
	printf("\t*    学生成绩管理：    *\n");
	printf("\t ---------------------- \n");
	printf("\t*  1.录入学生信息      *\n");
	printf("\t ---------------------- \n");
	printf("\t*  2.计算总分和平均分  *\n");
	printf("\t ---------------------- \n");
	printf("\t*  3.按学生成绩排序    *\n");
	printf("\t ---------------------- \n");
	printf("\t*  4.查询学生信息      *\n");
	printf("\t ---------------------- \n");
	printf("\t*  5.更改学生信息      *\n");
	printf("\t ---------------------- \n");
	printf("\t*  0.退出              *\n");
	printf("\t ---------------------- \n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>5||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>5||menusele<0);

	return menusele;
}

//计算功能菜单
int celemenu()
{
    int menusele;
    printf("\n\n");
    printf("\t -------------------------------- \n");
    printf("\t*    计算                        *\n");
    printf("\t -------------------------------- \n");
    printf("\t*  1.计算每个学生的总分和平均分  *\n");
    printf("\t -------------------------------- \n");
	printf("\t*  2.计算各个科目的平均分        *\n");
	printf("\t -------------------------------- \n");
	printf("\t*  0.返回上一层菜单              *\n");
	printf("\t -------------------------------- \n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>2||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>2||menusele<0);
	return  menusele;
}

//排序功能菜单
int rankmenu()
{
    int menusele;
    printf("\n\n");
    printf("\t --------------------\n");
    printf("\t*    排序            *\n");
    printf("\t --------------------\n");
    printf("\t*  1.按学生总分排序  *\n");
    printf("\t --------------------\n");
    printf("\t*  2.按学生学号排序  *\n");
    printf("\t --------------------\n");
	printf("\t*  3.按学生姓名排序  *\n");
	printf("\t --------------------\n");
	printf("\t*  0.返回上一层菜单  *\n");
	printf("\t --------------------\n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>3||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>3||menusele<0);
	return  menusele;
}
//查询功能菜单
int foundmenu()
{
    int menusele;
    printf("\n\n");
    printf("\t --------------------------------------\n");
    printf("\t*    查询                              *\n");
    printf("\t --------------------------------------\n");
    printf("\t*  1.查询所有学生成绩                  *\n");
    printf("\t --------------------------------------\n");
	printf("\t*  2.查询某个学生成绩                  *\n");
	printf("\t --------------------------------------\n");
	printf("\t*  3.查询总分小于等于某值的学生信息    *\n");
	printf("\t --------------------------------------\n");
	printf("\t*  4.查询总分大于等于某值得学生信息    *\n");
	printf("\t --------------------------------------\n");
	printf("\t*  5.查询平均分小于等于某值得学生信息  *\n");
	printf("\t --------------------------------------\n");
	printf("\t*  6.查询平均分大于等于某值得学生信息  *\n");
	printf("\t --------------------------------------\n");
	printf("\t*  0.返回上一层菜单                    *\n");
	printf("\t --------------------------------------\n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>6||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>6||menusele<0);
	return  menusele;
}
//更改信息功能菜单
int revisemenu()
{
    int menusele;
    printf("\n\n");
    printf("\t --------------------\n");
    printf("\t*    更改            *\n");
    printf("\t --------------------\n");
    printf("\t*  1.增加学生信息    *\n");
    printf("\t --------------------\n");
	printf("\t*  2.删除某学生信息  *\n");
	printf("\t --------------------\n");
	printf("\t*  3.修改某学生信息  *\n");
	printf("\t --------------------\n");
	printf("\t*  0.返回上一层菜单  *\n");
	printf("\t --------------------\n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>3||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>3||menusele<0);
	return  menusele;
}

int infomenu()
{
	int menusele;
	printf("\n\n");
	printf("\t --------------\n");
	printf("\t*  1.学生学号  *\n");
	printf("\t --------------\n");
	printf("\t*  2.学生姓名  *\n");
	printf("\t --------------\n");
	printf("\t*  3.大学语文  *\n");
	printf("\t --------------\n");
	printf("\t*  4.高等数学  *\n");
	printf("\t --------------\n");
	printf("\t*  5.大学英语  *\n");
	printf("\t --------------\n");
	printf("\t*  6.总分      *\n");
	printf("\t --------------\n");
	printf("\t*  7.平均分    *\n");
	printf("\t --------------\n");
	printf("\t*  0.退出      *\n");
	printf("\t --------------\n");
	printf("\t请输入您的选择：");
	do
    {
        scanf("%d",&menusele);
        getchar();
        if(menusele>7||menusele<0)
        printf("输入错误请重新输入:");
    }while(menusele>7||menusele<0);

	return menusele;
}

//定义结构体
typedef struct student
{
	//数据域
	char num[20];
	char name[20];
	float score1;
	float score2;
	float score3;
	float total;
	float ave;
	//指针域
	struct student *next;
}STUDENT;
STUDENT *readList(int n);
void celestu(STUDENT *head);
STUDENT *celesbj(STUDENT *head);
STUDENT *foundstu(STUDENT *head);
STUDENT *revise(STUDENT *head,int c);
STUDENT printList(STUDENT *head,int c);

//输入
//输入所有学生信息
STUDENT *readList(int n)
{
    int i;
	STUDENT *head,*p,*t;
	//创建头结点
	head=(STUDENT *)malloc(sizeof(STUDENT));
	//检验头结点是否创建成功
	if(head==NULL)
	{
		printf("头结点创建失败\n");
		exit(0);
	}
	//输入头结点数据
	head->next=NULL;
	p=head;
	//创建新的节点
	for(i=1;i<=n;i++)
	{
	t=(STUDENT *)malloc(sizeof(STUDENT));
	//检验新结点是否创建成功
	if(t==NULL)
	{
		printf("该结点创建失败");
		exit(0);
	}
	//输入新结点的数据
	printf("请按顺序输入第%d位学生的学号、姓名、语文成绩、数学成绩、英语成绩：",i);
	scanf("%s%s%f%f%f",t->num,t->name,&t->score1,&t->score2,&t->score3);
	//将该新结点接入链表
	t->next=NULL;
	p->next=t;
	p=t;
	}

	return(head);//返回链表头指针
}
//计算
//计算每个学生的总分和平均分
void celestu(STUDENT *head)
{
    STUDENT *t;
    t=head;
    while(t->next!=NULL)
    {
        t=t->next;
        t->total=t->score1+t->score2+t->score3;
        t->ave=t->total/3;
    }
}
//计算各个科目的平均分
STUDENT *celesbj(STUDENT *head)
{
    STUDENT *t,*p;
    int k=0;
    t=(STUDENT *)malloc(sizeof(STUDENT));//新增结点用于存储各科平均分
    if(t==NULL)
	{
		printf("头结点创建失败\n");
		exit(0);
	}
	p=head;
    strcpy(t->name,"平均分");
    strcpy(t->num,"     \\\\ ");
    t->score1=t->score2=t->score3=0;
    while(p->next!=NULL)
    {
        p=p->next;
        t->score1=t->score1+p->score1;
        t->score2=t->score2+p->score2;
        t->score3=t->score3+p->score3;
        k++;
    }
    t->score1=t->score1/k;
    t->score2=t->score2/k;
    t->score3=t->score3/k;
    t->total=0;
    t->ave=0;
    return (t);
}


//排序

    STUDENT *rank(STUDENT *head,int c)
    {
        STUDENT *f=NULL,*t=NULL,*max=NULL,*maxbf=NULL,*p,*h;
        float m;
        h=head->next;
        while(h!=NULL)
        {
            for(p=h,max=h;p->next!=NULL;p=p->next)
            {
                if(c==32)
                    m=strcmp(max->num,p->next->num);//按学号排序
                else if(c==33)
                    m=strcmp(max->name,p->next->name);//按姓名排序
                else if(c==31||c==131)
                    m=p->next->total-max->total;
                if(m>0)
                {
                    maxbf=p;
                    max=p->next;
                }
            }
            if(f==NULL)
            {
                f=max;
                t=max;
            }
            else
            {
                t->next=max;
                t=max;
            }
            if(max==h)
            {
                h=t->next;
            }
            else
            {
                maxbf->next=max->next;
            }
        }
        t->next=NULL;
        head->next=f;
        return head;
    }

//查询
//查询某个学生成绩
STUDENT *foundstu(STUDENT *head)
{
    int c=1;
    STUDENT *t;
    char num[20];
    printf("请输入该学生学号:");
    scanf("%s",num);
    t=head;
    while(t->next!=NULL)
    {
        t=t->next;
        c=strcmp(num,t->num);//比较学号
        if(c==0)
        {
            return (t);
        }
    }
    if(c!=0)
        {
            printf("找不到该学生信息\n");
            return NULL;
        }
}

//更改
STUDENT *revise(STUDENT *head,int c)
{
    STUDENT *t,*p;
    float *m;char *q;
    int n;
    char num[13]="1";
    if(c==51)//增加学生信息
    {
        printf("请输入需要增加的学生人数:");
        scanf("%d",&n);
        t=readList(n);
        p=t;
        while(p->next!=NULL)
        {
            p=p->next;
        }
        p->next=head->next;
        head->next=t->next;
    }
    else if(c==52||c==53||c==153||c==152)//修改和删除学生信息
    {
        t=head;
        p=head;

        while(1)
        {
            if(c==53)
            printf("请输入需要修改信息的学生学号");
            else if(c==52)
            printf("请输入需要删除信息的学生学号");
            printf("(输入0退出更改):");
            scanf("%s",num);//录入需要操作的学生学号
            if(strcmp(num,"0")==0)
                break;
            while(t->next!=NULL)
            {
                t=t->next;
                if(strcmp(num,t->num)==0)//按学号搜索学生信息
                {
                    if(c==52)//删除
                    {
                        p->next=t->next;
                        free(t);//释放被删除学生信息的内存
                    }
                    else if(c==53||c==153)//修改
                    {
                        c=c+200;
                        printList(t,c);
                        printf("以下为项目的序号：\n");
                        n=infomenu();
                        switch(n)
                        {
                            case 1:
                                q=t->num;
                                break;
                            case 2:
                                q=t->name;
                                break;
                            case 3:
                                m=&t->score1;
                                break;
                            case 4:
                                m=&t->score2;
                                break;
                            case 5:
                                m=&t->score3;
                                break;
                            case 6:
                                m=&t->total;
                                break;
                            case 7:
                                m=&t->ave;
                                break;
                            case 0:
                                break;
                        }
                        printf("请输入修改后的信息：");
                        if(n!=0)
                        {
                            if(n==1||n==2)
                            {
                                scanf("%s",p);
                                getchar();
                            }
                            else if(n>2)
                            {
                                scanf("%f",m);
                                getchar();
                            }
                            printf("修改后该学生信息如下：\n");
                            printList(t,c);
                        }
                        else if(n==0)
                            break;
                    }
                }
                p=p->next;
            }
        }

    }
    return head;
}
//输出
STUDENT printList(STUDENT *head,int c)
{
    STUDENT *t;
    t=head;
    int n=0;
    //输出所有学生信息
    if(c==11||c==21||c==41||c==32||c==33||c==51||c==52||c==53)
    {
        t=head;
        printf("学生学号\t学生姓名\t大学语文\t高等数学\t大学英语\n");
        while(t->next!=NULL)
        {
            t=t->next;
            printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3);
        }
    }
    else if(c==121||c==122||c==31||c==132||c==133||c==141||c==152||c==153)
    {
        t=head;
        printf("学生学号\t学生姓名\t大学语文\t高等数学\t大学英语\t    总分\t  平均分\n");
        while(t->next!=NULL)
        {
            t=t->next;
            printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
        }
    }
    //输出某一学生信息
    else if(c==22||c==42||c==241||c==253)
    {//未计算总分平均分
     if(c!=241)printf("学生学号\t学生姓名\t大学语文\t高等数学\t大学英语\n");
     printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3);
    }
    else if(c==42||c==53||c==142||c==353)
    {//已计算总分平均分
        printf("学生学号\t学生姓名\t大学语文\t高等数学\t大学英语\t    总分\t  平均分\n");
        printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
    }
    //输出总分或平均分在某一范围内的学生信息
    else if(c==43||c==44||c==45||c==46||c==143||c==144||c==145||c==146)
    {
        int X;
        printf("请输入X的值:");
        scanf("%d",&X);
        printf("学生学号\t学生姓名\t大学语文\t高等数学\t大学英语\t    总分\t  平均分\n");
        if(c==43||c==44||c==45||c==46)
            celestu(head);
        t=head;
        while(t->next!=NULL)
        {
            t=t->next;
            if(c==43||c==143)//输出总分小于某值得学生信息
            {
                if(t->total<=X)
                {
                    n++;
                    printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
                }
            }
            else if(c==44||c==144)//输出总分大于某值得学生信息
            {
                if(t->total>=X)
                {
                    n++;
                    printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
                }

            }
            else if(c==45||c==145)//输出平均分小于某值得学生信息
            {
                if(t->ave<=X)
                {
                    n++;
                    printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
                }

            }
            else if(c==46||c==146)//输出平均分大于某值得学生信息
            {
                if(t->ave>=X)
                {
                    printf("%8s\t%8s\t%8.1f\t%8.1f\t%8.1f\t%8.1f\t%8.1f\n",t->num,t->name,t->score1,t->score2,t->score3,t->total,t->ave);
                }

            }
        }

    }
}

void main()
{
    int ch,ch1,c=0,d=0;
    STUDENT *head=NULL,*t=NULL,*least=NULL,*p=NULL;
    int n;
    printf("\t\t\t\t\t******************************\n");
    printf("\t\t\t\t\t*                            *\n");
    printf("\t\t\t\t\t*    欢迎进入学生管理系统    *\n");
    printf("\t\t\t\t\t*                            *\n");
    printf("\t\t\t\t\t******************************\n");
    printf("请输入学生总人数：");
    scanf("%d",&n);
    getchar();
    while(1)
    {
        ch=menu();
        switch(ch)
        {
        case 1:
            printf("输入\n");
            head=readList(n);
            break;
        case 2:
            ch1=celemenu();
            switch(ch1)
            {
            case 1:
                printf("计算每个学生的总分和平均分\n");
                celestu(head);
                c=100;
                printList(head,ch*10+ch1+c);
                break;
            case 2:
                printf("计算各个科目的平均分\n");
                least=celesbj(head);
                if(least!=NULL)printList(least,ch*10+ch1);
                break;
            case 0:
                break;
            }
            break;
        case 3:

            ch1=rankmenu();
            switch(ch1)
            {
            case 1:
                printf("按学生总分排序\n");
                if(c==0)
                {
                    celestu(head);
                    c=100;
                }
                head=rank(head,ch*10+ch1+c);
                printList(head,ch*10+ch1);
                break;
            case 2:
                printf("按学生学号排序\n");
                head=rank(head,ch*10+ch1);
                printList(head,ch*10+ch1+c);
                break;
            case 3:
                printf("按学生姓名排序\n");
                head=rank(head,ch*10+ch1);
                printList(head,ch*10+ch1+c);
                break;
            case 0:
                break;
            }
            break;
        case 4:
            printf("查询\n");
            ch1=foundmenu();
            switch(ch1)
            {
            case 1:
                printf("查询所有学生成绩\n");
                printList(head,ch*10+ch1+c);
                if(least!=NULL)
                    printList(least,ch*10+ch1+200);
                break;
            case 2:
                printf("查询某个学生成绩\n");
                t=foundstu(head);
                if(t!=NULL)printList(t,ch*10+ch1+c);
                t=NULL;
                break;
            case 3:
                printf("查询总分小于等于某值的学生信息\n");
                printList(head,ch*10+ch1+c);
                break;
            case 4:
                printf("查询总分大于等于某值的学生信息\n");
                printList(head,ch*10+ch1+c);
                break;
            case 5:
                printf("查询平均分小于等于某值的学生信息\n");
                printList(head,ch*10+ch1+c);
                break;
            case 6:
                printf("查询平均分大于等于某值的学生信息\n");
                printList(head,ch*10+ch1+c);
                break;
            case 0:
                break;
            }
            break;
        case 5:
            printf("更改\n");
            ch1=revisemenu();
            switch(ch1)
            {
            case 1:
                printf("增加学生信息\n");
                head=revise(head,ch*10+ch1);
                printList(head,ch*10+ch1);
                c=0;
                break;
            case 2:
            	
                printf("删除学生信息\n");
                head=revise(head,ch*10+ch1+c);
                printList(head,ch*10+ch1+c);
                break;
            case 3:
                printf("修改学生信息\n");
                head=revise(head,ch*10+ch1+c);
                break;
            case 0:
                break;
            }
            break;
        case 0:
            printf("退出\n");
            exit(0);
            break;
        }
    }
}