C语言程序设计,不会做,求

实现简单成绩管理功能;

要求:用结构体实现,包含的成员有学生学号、姓名、性别、语文成绩、数学成绩、英语成绩、平均分(结构体的定义)

基本功能:从键盘输入条目,并建表输出,输出信息包括结构体所有内容以及每门功课的平均分 (结构体的输入、输出)

额外功能:

1.按学号、姓名、平均成绩排序

2.姓名查找、修改条目

3.删除条目、新增条目

4.统计功能,统计不及格人数,统计各分数段人数

要求: 1.各功能以子函数实现

*学生成绩管理系统

  •          1.输入信息                       *
    
  •          2.输出信息                       *
    
  •          3.排序                              *
    
  •          4.查找                              *
    
  •          5.修改                              *
    
  •          6.新增                              *
    
  •          7.删除                              *
    
  •          8.统计                              *
    
  •          0.退出程序                        *
    

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#include<stdio.h>
#include<windows.h>
#define Max 25
#define obj_num 5
struct Stu
{
    char Name[25];     //姓名
    int Number;        //学号
    int Language_score;//语文成绩
    int Math_score;    //数学成绩
    int English_score; //英语成绩
    int PE_score;      //体育成绩
    int C_score;       //C语言成绩
    int Sum_score;     //总成绩
};
void input(struct Stu Class[],int j)
{
    printf("输入第%d位同学姓名:",j+1);
    scanf("%s",Class[j].Name);
    getchar();
    printf("输入第%d位同学学号:",j+1);
    scanf("%d",&Class[j].Number);
    printf("输入第%d位同学语文成绩:",j+1);
    scanf("%d",&Class[j].Language_score);
    printf("输入第%d位同学数学成绩:",j+1);
    scanf("%d",&Class[j].Math_score);
    printf("输入第%d位同学英语成绩:",j+1);
    scanf("%d",&Class[j].English_score);
    printf("输入第%d位同学体育成绩:",j+1);
    scanf("%d",&Class[j].PE_score);
    printf("输入第%d位同学C语言成绩:",j+1);
    scanf("%d",&Class[j].C_score);
    Class[j].Sum_score=Class[j].Language_score+Class[j].Math_score+Class[j].English_score+Class[j].PE_score+Class[j].C_score;
}
void output(struct Stu Class[],int n)
{
    printf("---------------------------------------------\n");
    printf("姓名  学号  语文  数学  英语  体育  C语言  总分");
    printf("\n");
    int j;
    for(j=0; j<n; j++)
    {
        printf("%5s",Class[j].Name);
        printf("%5d",Class[j].Number);
        printf("%6d",Class[j].Language_score);
        printf("%6d",Class[j].Math_score);
        printf("%6d",Class[j].English_score);
        printf("%6d",Class[j].PE_score);
        printf("%6d",Class[j].C_score);
        printf("%7d",Class[j].Sum_score);
        printf("\n");
    }
    printf("---------------------------------------------\n");
}
void outputOne(struct Stu Class[],int j)
{
    printf("姓名  学号  语文  数学  英语  体育  C语言  总分");
    printf("\n");
    printf("%5s",Class[j].Name);
    printf("%5d",Class[j].Number);
    printf("%6d",Class[j].Language_score);
    printf("%6d",Class[j].Math_score);
    printf("%6d",Class[j].English_score);
    printf("%6d",Class[j].PE_score);
    printf("%6d",Class[j].C_score);
    printf("%7d",Class[j].Sum_score);
    printf("\n");
}
void Sort(struct Stu Class[],int n)
{
    int j,k;
    struct Stu t;
    for(j=0; j<n-1; j++)
    {
        for(k=0; k<n-j-1; k++)
        {
            if(Class[k].Sum_score<Class[k+1].Sum_score)
            {
                t=Class[k];
                Class[k]=Class[k+1];
                Class[k+1]=t;
            }
        }
    }
}
int search(int number,int n,struct Stu Class[])
{
    int i,p=0;
    for(i=0; i<n; i++)
    {
        if(Class[i].Number==number)
        {
            p=i;
            return p;
        }
    }
    return -1;
}
void modify(int number,int n,struct Stu Class[])
{
    int index=search(number,n,Class);
    if(index==-1)
    {
        printf("找不到该学号\n");
    }
    else
    {
        printf("学号%d的学生是第%d位\n",number,index+1);
        input(Class,index);
        printf("修改成功\n");
        output(Class,n);
    }
}
void del(int number,int n,struct Stu Class[])
{
    int index=search(number,n,Class);
    if(index==-1)
    {
        printf("找不到该学号\n");
    }
    else
    {
        printf("学号%d的学生是第%d位\n",number,index);
        int i;
        for(i=index; i<n-1; i++)
        {
            Class[i]= Class[i+1];
        }
        printf("删除成功\n");
        output(Class,n-1);
    }
}
double calave(int n,struct Stu Class[],double ave[])
{
    int Language_score_sum=0;
    int Math_score_sum=0;
    int English_score_sum=0;
    int PE_score_sum=0;
    int C_score_sum=0;
    for(int i=0; i<n; i++)
    {
        Language_score_sum+=Class[i].Language_score;
        Math_score_sum+=Class[i].Math_score;
        English_score_sum+=Class[i].English_score;
        PE_score_sum+=Class[i].PE_score;
        C_score_sum+=Class[i].C_score;
    }
    ave[0]=(double)Language_score_sum/n;
    ave[1]=(double)Math_score_sum/n;
    ave[2]=(double)English_score_sum/n;
    ave[3]=(double)PE_score_sum/n;
    ave[4]=(double)C_score_sum/n;
}
void save(int n,struct Stu Class[])
{
    FILE *fp;
    fp = fopen("score_data.txt","w");
    if(fp == NULL)
    {
        printf("error!");
        return;
    }
    else
    {
        for(int j=0; j<n; j++)
        {
            fprintf(fp,"%s %d %d %d %d %d %d %d\n",Class[j].Name,Class[j].Number,Class[j].Language_score,Class[j].Math_score,Class[j].English_score,Class[j].PE_score,Class[j].C_score,Class[j].Sum_score);
        }
        printf("文件写入成功\n");
    }
    fclose(fp);
}
int read(int n,struct Stu Class[])
{
    FILE *fp;
    fp = fopen("score_data.txt","r");
    int count=0;
    if(fp == NULL)
    {
        printf("error!");
        return 0;
    }
    else
    {
        for(int j=0; j<n; j++)
        {
            int flag=fscanf(fp,"%s %d %d %d %d %d %d %d\n",Class[j].Name,&Class[j].Number,&Class[j].Language_score,&Class[j].Math_score,&Class[j].English_score,&Class[j].PE_score,&Class[j].C_score,&Class[j].Sum_score);
            if(flag!=-1) count++;
        }
        printf("文件读取成功\n");
    }
    fclose(fp);
    return count;
}
void menu(struct Stu Class[])
{
    int n=0,count;
    int option=1;
    while(option<=9&&option>=1)
    {
        printf("------------------------\n");
        printf("------学生成绩管理------\n");
        printf("------1.输入成绩  ------\n");
        printf("------2.输出成绩  ------\n");
        printf("------3.按总成绩排序----\n");
        printf("------4.按学号查询成绩--\n");
        printf("------5.修改信息  ------\n");
        printf("------6.删除学生  ------\n");
        printf("------7.计算各科平均分--\n");
        printf("------8.文件读入  ------\n");
        printf("------9.保存至文件------\n");
        printf("------other.退出  ------\n");
        printf("------------------------\n");
        printf("输入选项:");
        scanf("%d",&option);
        switch(option)
        {
            case 1:
            {
                system("cls");
                printf("输入学生的个数(不大于%d):",Max-n);
                scanf("%d",&count);
                while(count--)
                {
                    input(Class,n++);
                }
                output(Class,n);
                break;
            }
            case 2:
            {
                system("cls");
                output(Class,n);
                break;
            }
            case 3:
            {
                system("cls");
                Sort(Class,n);
                output(Class,n);
                break;
            }
            case 4:
            {
                system("cls");
                int number;
                printf("输入要查找的学号:");
                scanf("%d",&number);
                int index=search(number,n,Class);
                if(index==-1)
                {
                    printf("查找失败\n");
                }
                else
                {
                    printf("查找成功\n");
                    outputOne(Class,index);
                }
                break;
            }
            case 5:
            {
                system("cls");
                output(Class,n);
                int number;
                printf("输入要修改成绩的学生对应的学号:");
                scanf("%d",&number);
                modify(number,n,Class);
                output(Class,n);
                break;
            }
            case 6:
            {
                system("cls");
                output(Class,n);
                int number;
                printf("输入要删除的学号:");
                scanf("%d",&number);
                del(number,n,Class);
                n--;
                system("cls");
                output(Class,n);
                break;
            }
            case 7:
            {
                system("cls");
                output(Class,n);
                double ave[obj_num];
                calave(n,Class,ave);
                char str[]="平均分";
                printf("\n");
                printf("%5s",str);
                printf("     ");
                printf("%5.2lf",ave[0]);
                printf("%6.2lf",ave[1]);
                printf("%6.2lf",ave[2]);
                printf("%6.2lf",ave[3]);
                printf("%6.2lf",ave[4]);
                printf("\n");
                break;
            }
            case 8:
            {
                system("cls");
                n-=n; 
                n+=read(Max,Class);
                break;
            }
            case 9:
            {
                system("cls");
                save(n,Class);
                break;
            }
            default :
            {
                break;
            }
        }
    }
}
int main()
{
    struct Stu Class [Max];
    menu(Class);
    return 0;
}

我有源码

根据你的要求简单的写了一下,可以根据自己调整,觉得可以麻烦给个采纳。谢谢


#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
 
//宏定义最大学生人数
#define stu_max 30
 
/*进行函数的全局声明*/
 
//获取学生人数
int stu_num();
//显示菜单获取用户输入
char menu_tips();
//获取学生学号,及本门考试成绩
void stu_information(long num[],float score[],int n);
//计算输出课程的总分和平均分
void sum_aver(float score[],int n);
//模块功能:交换两个长整型数据
void exchange_long(long *a,long *b);
//模块功能:交换两个浮点型数据
void exchange_float(float *a,float *b);
//按成绩由高到低输出名次表
void output_score(long num[],float score[],int n);
//按学号从小到大排出成绩表
void output_num(long num[],float score[],int n);
//查询输出学生信息及考试成绩:
void query(long num[],float score[],int n);
//分数划界处理并输出
void score_pro(float score[],int n);
//直接输出对应列表
void output(long num[],float score[],int n);
//暂停清屏
void clean();
 
int main()
{
 int n,i;
 long num[stu_max];
 float score[stu_max];
 n=stu_num();
 while(1)
 {
 i=menu_tips();
 switch(i)
 {
 case '1':printf("1"),stu_information(num,score,n),system("cls");break;
 case '2':printf("2"),sum_aver(score,n),clean();break;
 case '3':printf("3"),output_score(num,score,n),clean();break;
 case '4':printf("4"),output_num(num,score,n),clean();break;
 case '5':printf("5"),query(num,score,n),clean();break;
 case '6':printf("6"),score_pro(score,n),clean();break;
 case '7':printf("7"),output(num,score,n),clean();break;
 case '0':printf("0"),exit(0);break;
 default:printf("Input error!\n"),clean();
 }
 }
}
 
/*以下为函数功能模块*/
 
//获取学生人数
int stu_num()
{
 int n;
 printf("Input student number(n<30):\n");
 scanf("%d",&n);
 system("cls");
 return n;
}
 
//显示菜单获取用户输入
char menu_tips()
{
 printf(" -----------------------------------------------------------\n");
 printf("| Management for Students' scores |\n");
 printf(" -----------------------------------------------------------\n");
 printf("| 1.Input record   |\n");
 printf("| 2.Calculate total and average score of course |\n");
 printf("| 3.Sort in descending order by score  |\n");
 printf("| 4.Sort in ascending order by numbe  |\n");
 printf("| 5.Search by number   |\n");
 printf("| 6.Statistic analysis  |\n");
 printf("| 7.List record   |\n");
 printf("| 0.Exit   |\n");
 printf(" -----------------------------------------------------------\n");
 printf("\nPlease Input your choice:\n");
 char i;
 i=getch();
 return i;
}
 
//获取学生学号,及本门考试成绩
void stu_information(long num[],float score[],int n)
{
 int i;
 printf("\nInput student's ID and score:\n");
 for(i=0;i<n;i++)
 scanf("%ld%f",&num[i],&score[i]);
}
 
//计算输出课程的总分和平均分
void sum_aver(float score[],int n)
{
 int i;
 float sum,aver;
 for(i=0,sum=0;i<n;i++)
 sum+=score[i];
 aver=sum/n;
 printf("\nsum=%.0f,aver=%.2f\n",sum,aver);
}
 
//模块功能:交换两个长整型数据
void exchange_long(long *a,long *b)
{
 long t;
 t=*a;
 *a=*b;
 *b=t;
}
 
//模块功能:交换两个浮点型数据
void exchange_float(float *a,float *b)
{
 float t;
 t=*a; *a=*b; *b=t;
}
 
//按成绩由高到低输出名次表
void output_score(long num[],float score[],int n)
{
 int i,j;
 for(j=n-1;j>0;j--)
 {
 for(i=0;i<j;i++)
 if(score[i]<score[i+1])
 {
 exchange_float(&score[i],&score[i+1]);
 exchange_long(&num[i],&num[i+1]);
 }
 }
 printf("\nSort in descending order by score:");
 output(num,score,n);
}
 
//按学号从小到大排出成绩表
void output_num(long num[],float score[],int n)
{
 int i,j;
 for(j=n-1;j>0;j--)
 {
 for(i=0;i<j;i++)
 if(num[i]>num[i+1])
 {
 exchange_float(&score[i],&score[i+1]);
 exchange_long(&num[i],&num[i+1]);
 }
 }
 output(num,score,n);
}
 
//查询输出学生信息及考试成绩:
void query(long num[],float score[],int n)
{
 printf("\nEnter the ID to query:\n");
 long temp;
 scanf("%ld",&temp);
 int i;
 for(i=0;i<n;i++)
 {
 if(num[i]==temp)
 {
 printf("%ld\t%.0f\n",num[i],score[i]);
 return;
 }
 }
 printf("\nNot found!\n");
}
 
//分数划界处理并输出
void score_pro(float score[],int n)
{
 int t[6]={0,0,0,0,0,0};
 /*前五个分别对应优秀、良好、中等、及格、不及格五个类别
 第六位存储100分的人数*/
 int i,m;
 for(i=0;i<n;i++)
 {
 if(score[i]>=90&&score[i]<100) t[0]++;
 if(score[i]>=80&&score[i]<=89) t[1]++;
 if(score[i]>=70&&score[i]<=79) t[2]++;
 if(score[i]>=60&&score[i]<=69) t[3]++;
 if(score[i]>=0 &&score[i]<=59) t[4]++;
 if(score[i]==100) t[5]++;
 }
 
 //遍历t数组,输出对应的数据
 for(i=0,m=9;i<6;i++)
 {
 if(i==4)
 printf("<60\t%d\t%.2f%%\n",t[4],(float)t[4]/n*100);
 if(i==5)
 printf("%d\t%d\t%.2f%%\n",100,t[5],(float)t[5]/n*100);
 if(i!=4&&i!=5)
 {
 if(i==0)
 printf("\n");
 printf("%d-%d\t%d\t%.2f%%\n",m*10,m*10+9,t[i],(float)t[i]/n*100);
 m--;
 }
 }
}
 
//直接输出对应列表
void output(long num[],float score[],int n)
{
 int i;
 for(i=0;i<n;i++)
 {
 if(i==0)
 printf("\n");
 printf("%ld\t%.0f\n",num[i],score[i]);
 }
}
 
//暂停清屏
void clean()
{
 system("pause");
 system("cls");
}

https://blog.csdn.net/wangmeng0804/article/details/127655704?spm=1001.2014.3001.5502
题主可参考我博客的第一篇文章 学生信息管理系统