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 *
#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