c語言程序學生成績管理重要性
⑴ 基於C語言的學生成績管理系統的研究意義與發展
你要的是論文？
⑵ C語言程序設計 學生成績管理信息系統
我主要設計一個能實現學生信息管理系統，讓它來運行和管理學生信息。它在現實生活中運用方便的、管理方便。它能輸入學生學號、年齡、性別、出生年月、地址電話E-mail。系統以菜單的方式進行工作，進入子菜單後，還可以返回主菜單。在子菜單中的各種操作都有中文說明，操作簡單、易懂。只要我們正確的操作系統，系統就無異常現在，當然系統也能對一些基本的錯誤做出提示，並能讓使用者重新進行操作。
對各個操作的成功，如：添加學生信息、修改學生信息、刪除學
生信息，系統都輸出「…….的成功」的字樣。系統對刪除和修改前，還進行「確定」和「取消」。系統對不存在的學號和姓名系統能判斷是否存在。對已存在的學號，操作者不能添加和這個學號一樣的學生信息，同時系統還提示已有此學號。對於修改、刪除和查詢，系統遇到不存在的學生能提示沒有這個信息。
⑶ 學生成績管理c語言程序
這是我今天剛考完的,5個學生 3門課程,和你的差不多,你只要稍微修改一下就可以啦~
記得給分我啊!~~~~~~~~~~~~~~~~~~
#include "stdio.h"
#include "stdlib.h"
#define N 5
void sort(char *code[],char *name[],float *scorel,float *score2,float *score3,float *aver,int n);
main()
{char *code[N],*name[N];
float score1[N],score2[N],score3[N],aver[N];
int i;
for (i=0;i<N;i++)
{printf("input NO.%d:",i+1);
code[i]=malloc(8);
name[i]=malloc(12);
scanf("%s%s%f%f%f",code[i],name[i],&score1[i],&score2[i],&score3[i]);
aver[i]=(score1[i]+score2[i]+score3[i])/3.0;
}
printf("\n");
printf(" school report(1) \n");
printf("------------------------------------------------------------- \n");
printf("code name score1 score2 score3 aver\n");
printf("-------------------------------------------------------------\n");
for (i=0;i<N;i++)
{printf("%-10s%-14s%8.2f%8.2f%8.2f%8.2f\n",code[i],name[i],score1[i],score2[i],score3[i],aver[i]);
}
printf("-------------------------------------------------------------\n");
sort(code,name,score1,score2,score3,aver,N);
printf("\n");
printf(" school report(2) \n");
printf("-------------------------------------------------------------\n");
printf("code name score1 score2 score3 aver\n");
printf("-------------------------------------------------------------\n");
for (i=0;i<N;i++)
{
printf("%-10s%-14s%8.2f%8.2f%8.2f%8.2f\n",code[i],name[i],score1[i],score2[i],score3[i],aver[i]);
}
printf("\n");
getch();
}
void sort(char *code[],char*name[],float *score1,float *score2,float *score3,float *aver,int n)
{
int i,j;
float temp;
char *temp1;
for (i=0;i<n-1;i++)
for (j=1;j<n;j++)
if (aver[i]<aver[j])
{
temp=aver[i];aver[i]=aver[j];aver[j]=temp;
temp=score1[i];score1[i]=score1[j];score1[j]=temp;
temp=score2[i];score2[i]=score2[j];score2[j]=temp;
temp=score3[i];score3[i]=score3[j];score3[j]=temp;
temp1=name[i];name[i]=name[j];name[j]=temp1;
temp1=code[i];code[i]=code[j];code[j]=temp1;
}
}
⑷ c語言程序設計：學生成績管理系統
include "stdio.h" /*I/O函數*/
#include "stdlib.h" /*其它說明*/
#include "string.h" /*字元串函數*/
#include "conio.h" /*屏幕操作函數*/
#include "mem.h" /*內存操作函數*/
#include "ctype.h" /*字元操作函數*/
#include "alloc.h" /*動態地址分配函數*/
struct score
{
int mingci;
char xuehao[8];
char mingzi[20];
float score[6];
}data,info[1000];
int i,j,k=0;
char temp[20],ch;
FILE *fp,*fp1;
void shuru()
{
if((fp=fopen("s_score.txt","ab+"))==NULL)
{
printf("cannot open this file.\n");
getch();exit(0);
}
for(i=0;i<=1000;i++)
{
printf("\nPlease shuru xuehao:");
gets(data.xuehao);
printf("Please shuru mingzi:");
gets(data.mingzi);
printf("Please shuru yuwen score:");
gets(temp);data.score[0]=atof(temp);
printf("Please shuru shuxue score:");
gets(temp);data.score[1]=atof(temp);
printf("Please input yingyu score:");
gets(temp);data.score[2]=atof(temp);
printf("Please shuru wuli score:");
gets(temp);data.score[3]=atof(temp);
printf("Please shur huaxue score:");
gets(temp);data.score[4]=atof(temp);
data.score[5]=data.score[0]+data.score[1]+data.score[2]+data.score[3]+data.score[4];
fwrite(&data,sizeof(data),1,fp);
printf("another?y/n");
ch=getch();
if(ch=='n'||=='N')
break;
} fclose(fp);
}
void xianshi()
{
float s;int n;
if((fp=fopen("s_score.txt","rb+"))==NULL)
{
printf("Cannot reading this file.\n");
exit(0);
}
for(i=0;i<=1000;i++)
{
if((fread(&info[i],sizeof(info[i]),1,fp))!=1)
break;
}
printf("\nxuehao mingzi yuwen shuxue yingyu wuli huauxue zhongfen\n");
for(j=0,k=1;j<i;j++,k++)
{
info[j].mingci=k;
printf("%6s %8s %3.1f %3.1f %3.1f %3.1f %3.1f %3.1f\n",info[j].xuehao,info[j].mingzi,info[j].score[0],info[j].score[1],info[j].score[2],info[j].score[3],info[j].score[4],
info[j].score[5]);
}
getch();
fclose(fp);
}
void xiugai()
{
if((fp=fopen("s_score.txt","rb+"))==NULL||(fp1=fopen("temp.txt","wb+"))==NULL)
{
printf("Cannot open this file.\n");
exit(0);
}
printf("\nPLease shuru xiugai xuehao:");
scanf("%d",&i); getchar();
while((fread(&data,sizeof(data),1,fp))==1)
{
j=atoi(data.xuehao);
if(j==i)
{
printf("xuehao:%s\nmingzi:%s\n",data.xuehao,data.mingzi);
printf("Please shuru mingzi:");
gets(data.mingzi);
printf("Please shuru yuwen score:");
gets(temp);data.score[0]=atof(temp);
printf("Please shuru shuxue score:");
gets(temp);data.score[1]=atof(temp);
printf("Please input yingyu score:");
gets(temp);data.score[2]=atof(temp);
printf("Please input wuli score:");
gets(temp);data.score[3]=atof(temp);
printf("Please input huaxue score:");
gets(temp);data.score[4]=atof(temp);
data.score[5]=data.score[0]+data.score[1]+data.score[2]+data.score[3]+data.score[4];
} fwrite(&data,sizeof(data),1,fp1);
}
fseek(fp,0L,0);
fseek(fp1,0L,0);
while((fread(&data,sizeof(data),1,fp1))==1)
{
fwrite(&data,sizeof(data),1,fp);
}
fclose(fp);
fclose(fp1);
}
void chazhao()
{
if((fp=fopen("s_score.txt","rb"))==NULL)
{
printf("\nCannot open this file.\n");
exit(0);
}
printf("\nPLease shuru xuehao chakan:");
scanf("%d",&i);
while(fread(&data,sizeof(data),1,fp)==1)
{
j=atoi(data.xuehao);
if(i==j)
{
printf("xuehao:%s mingzi:%s\nyuwen:%f\n shuxue:%f\n yingyu:%f\n wuli:%f\n huaxue:%f\n ",data.xuehao,data.mingzi,data.score[0],data.score[1],data.score[2],data.score[3],data.score[4],data.score[5]);
}getch();
}
}
void shanchu()
{
if((fp=fopen("s_score.txt","rb+"))==NULL||(fp1=fopen("temp.txt","wb+"))==NULL)
{
printf("\nopen score.txt was failed!");
getch();
exit(0);
}
printf("\nPlease input ID which you want to del:");
scanf("%d",&i);getchar();
while((fread(&data,sizeof(data),1,fp))==1)
{
j=atoi(data.xuehao);
if(j==i)
{
printf("Anykey will delet it.\n");
getch();
continue;
}
fwrite(&data,sizeof(data),1,fp1);
}
fclose(fp);
fclose(fp1);
remove("s_score.txt");
rename("temp.txt","s_score.txt");
printf("Data delet was succesful!\n");
printf("Anykey will return to main.");
getch();
}
main()
{
while(1)
{
clrscr(); /*清屏幕*/
gotoxy(1,1); /*移動游標*/
textcolor(YELLOW); /*設置文本顯示顏色為黃色*/
textbackground(BLUE); /*設置背景顏色為藍色*/
window(1,1,99,99); /* 製作顯示菜單的窗口，大小根據菜單條數設計*/
clrscr();
printf("*************welcome to use student manage******************\n");
printf("*************************menu********************************\n");
printf("* ========================================================= * \n");
printf("* 1>shuru 2>xiugai * \n");
printf("* 3>shanchu 4>chazhao * \n");
printf("* 5>xianshi 6>exit * \n");
printf("* * \n");
printf("* --------------------------------------------------------- * \n");
printf(" Please input which you want(1-6):");
ch=getch();
switch(ch)
{
case '1':shuru();break;
case '2':xiugai(); break;
case '3':shanchu(); break;
case '4':chazhao(); break;
case '5':xianshi(); break;
case '6':exit(0);
default: continue;
}
}
}
在tc中運行
⑸ C語言程序設計 班級學生成績管理系統
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <conio.h>
#define ADDRFILE "c:\\addrlist.txt"
typedef struct tagLinkedList
{
char name[30];
char tel[30];
char addr[100];
struct tagLinkedList *prev;
struct tagLinkedLIst *next;
}ADDR;
ADDR *g_pAddrHead = NULL;
ADDR *g_pFind;
int g_bSaved = 1;
void get_addrlist(void);
int add_list(const ADDR *addr);
int find_list(const char *name);
void SetHeadPosition(void);
void SetTailPosition(void);
void Add_addr(void);
void Find_addr(void);
void Modify_addr(void);
void Delete_addr(void);
void Print_addr(void);
void Save_addr(void);
void Remove_addr(void);
void main(void)
{
int ch;
get_addrlist();
puts("通訊錄程序 Version 1.0");
while(1)
{
printf("\n[1]新增 [2]搜索 [3]修改 [4]刪除 [5]輸出 [S]儲存 [Q]退出");
ch = getch();
switch(ch)
{
case '1': Add_addr();break;
case '2': Find_addr();break;
case '3': Modify_addr();break;
case '4': Delete_addr();break;
case '5': Print_addr();break;
case 's':
case 'S': Save_addr();break;
case 'q':
case 'Q':
if(g_bSaved == 0)
{
printf("\n\n修改後的數據需要儲存嗎？(y/n)?");
ch = getchar();
if(ch == 'Y' || ch == 'y') Save_addr();
}
Remove_addr(); exit(1);
default : printf("\n\n 請按1~5或S/Q健.\n\n");break;
}
}
}
void get_addrlist(void)
{
ADDR addr;
FILE *fp;
fp = fopen(ADDRFILE,"rb");
if(fp == NULL)
{
perror("open file error;");
return;
}
while(!feof(fp))
{
fread(&addr,1,sizeof(ADDR),fp);
if(ferror(fp))
{
fclose(fp);
perror("file read error;");
return;
}
if(feof(fp))break;
if(add_list(&addr) == 0)
{
printf(".\n");
}
}
fclose(fp);
}
int add_list(const ADDR *addr)
{
ADDR *plocal,*pn = g_pAddrHead;
SetHeadPosition();
if(g_pAddrHead == NULL)
{
plocal = malloc(sizeof(ADDR));
memset(plocal,0,sizeof(ADDR));
if(plocal == NULL)
{
return 0;
}
g_pAddrHead = plocal;
g_pAddrHead->prev = NULL;
g_pAddrHead->next = NULL;
}
else
{
plocal = malloc(sizeof(ADDR));
memset(plocal,0,sizeof(ADDR));
if(plocal == NULL)
{
return 0;
}
while(pn->next)
{
pn = pn->next;
}
pn->next = plocal;
plocal->prev = pn;
plocal->next = NULL;
}
strcpy(plocal->name,addr->name);
strcpy(plocal->tel,addr->tel);
strcpy(plocal->addr,addr->addr);
return 1;
}
int find_list(const char *name)
{
ADDR *plocal;
SetHeadPosition();
plocal = g_pAddrHead;
while(plocal)
{
if(strstr(plocal->name,name))
{
g_pFind = plocal;
return 1;
}
plocal = plocal->next;
}
return 0;
}
void SetHeadPosition(void)
{
if(g_pAddrHead == NULL) return;
while(g_pAddrHead->prev)
{
g_pAddrHead = g_pAddrHead->prev;
}
}
void SetTailPosition(void)
{
if(g_pAddrHead == NULL) return;
while(g_pAddrHead->next)
{
g_pAddrHead = g_pAddrHead->next;
}
}
void Remove_addr(void)
{
ADDR *plocal;
if(g_pAddrHead == NULL) return;
SetHeadPosition();
while(g_pAddrHead)
{
plocal = g_pAddrHead->next;
free(g_pAddrHead);
g_pAddrHead = plocal;
}
g_pAddrHead = NULL;
}
void Add_addr(void)
{
ADDR addr;
memset(&addr,0,sizeof(ADDR));
printf("\n\nName: ");gets(addr.name);
if(strlen(addr.name) == 0) return;
printf("TEL: ");gets(addr.tel);
printf("ADDR: ");gets(addr.addr);
if(find_list(addr.name) == 1)
{
printf("\n已經存在的姓名.\n\n");
puts(g_pFind->name);
puts(g_pFind->tel);
puts(g_pFind->addr);
return;
}
if(add_list(&addr))
{
g_bSaved = 0;
printf("\n儲存完畢.\n\n");
}
}
void Find_addr(void)
{
char buff[100] ={0,};
ADDR *plocal;
printf("\n\n請輸入要查找的姓名/電話/地址.\n");
printf("姓名/電話/地址 :");gets(buff);
if(strlen(buff) == 0) return;
SetHeadPosition();
plocal = g_pAddrHead;
g_pFind = NULL;
while(plocal)
{
if(strstr(plocal->name,buff))
{
g_pFind = plocal;
break;
}
if(strstr(plocal->tel,buff))
{
g_pFind = plocal;
break;
}
if(strstr(plocal->addr,buff))
{
g_pFind = plocal;
break;
}
plocal = plocal->next;
}
if(g_pFind)
{
puts(g_pFind->name);
puts(g_pFind->tel);
puts(g_pFind->addr);
}
else
{
printf("\n\n搜索不到要找的%s.\n\n",buff);
}
}
void Modify_addr(void)
{
char name[100] = {0,};
ADDR addr;
while(1)
{
printf("\n\n要修改的姓名: ");gets(name);
if(strlen(name) == 0) return;
if(find_list(name) == 0)
{
puts("輸入的姓名不存在.");
continue;
}
break;
}
printf("\n%s的通訊錄如下：\n\n",name);
puts(g_pFind->name);
puts(g_pFind->tel);
puts(g_pFind->addr);
printf("\n輸入要修改的姓名/電話/地址.\n\n");
printf("NAME: ");gets(addr.name);
printf("TEL : ");gets(addr.tel);
printf("ADDR: ");gets(addr.addr);
if(strlen(addr.name)==0) strcpy(addr.name,name);
strcpy(g_pFind->name,addr.name);
strcpy(g_pFind->tel,addr.tel);
strcpy(g_pFind->addr,addr.addr);
g_bSaved = 0;
printf("%s的通訊錄修改成功.\n",name);
}
void Delete_addr(void)
{
char name[100] ={0,};
ADDR *plocal;
int ch;
while(1)
{
printf("\n\n要刪除的姓名: ");gets(name);
if(strlen(name)==0) return;
if(find_list(name) == 0)
{
puts("要刪除的通訊錄不存在.");
continue;
}
break;
}
puts(g_pFind->name);
puts(g_pFind->tel);
puts(g_pFind->addr);
printf("確定要刪除%s的通訊錄嗎(y/n)?",name);
ch = getch();
fflush(stdin);
if(ch == 'Y'||ch == 'y')
{
if(g_pFind->prev == NULL)
{
if(g_pFind->next == NULL)
{
free(g_pFind);
g_pAddrHead = NULL;
}
else
{
plocal = g_pFind->next;
free(g_pFind);
plocal->prev =NULL;
g_pAddrHead = plocal;
}
}
else if(g_pFind->next == NULL)
{
plocal = g_pFind->prev;
free(g_pFind);
plocal->next =NULL;
g_pAddrHead = plocal;
}
else
{
plocal = g_pFind->prev;
plocal->next = g_pFind->next;
plocal = g_pFind->next;
plocal->prev = g_pFind->prev;
free(g_pFind);
g_pAddrHead = plocal;
}
g_bSaved = 0;
printf("\n\n刪除完畢.\n\n");
}
}
void Print_addr(void)
{
int count = 1;
ADDR *plocal;
SetHeadPosition();
if(g_pAddrHead == NULL)
{
printf("\n\n無任何數據\n");
return;
}
plocal = g_pAddrHead;
while(plocal->prev)
{
plocal=plocal->prev;
}
printf("\n\n");
while(plocal)
{
printf("NO.%d\n",count++);
puts(plocal->name);
puts(plocal->tel);
printf("%s\n\n",plocal->addr);
printf("請按任意一健(結束:q)\n\n");
getch();
if(getch() == 'q')return;
plocal=plocal->next;
}
}
void Save_addr(void)
{
ADDR *plocal, *pn;
FILE *fp;
if(g_pAddrHead == NULL) return;
fp = fopen(ADDRFILE,"w+b");
if(fp == NULL)
{
perror("file open error;");
return;
}
SetHeadPosition();
plocal = g_pAddrHead;
while(plocal)
{
pn = plocal->next;
plocal = pn;
}
printf("\n所有數據已經儲存完畢.");
g_bSaved = 1;
fclose(fp);
}
⑹ 關於c語言程序設計的學生成績管理
不會的話，可以請教我，look my name
⑺ C語言程序設計學生成績管理系統
#include
"stdio.h"
/*定義學生結構體*/
struct
Student
{
char
ID[20];
char
Name[20];
float
Mark1;
float
Mark2;
float
Mark3;
float
Average;
};
/*聲明學生數組及學生數量*/
struct
Student
students[1000];
int
num=0;
/*求平均值*/
float
Avg(struct
Student
stu)
{
return
(stu.Mark1+stu.Mark2+stu.Mark3)/3;
}
/*通過學號返回數組下標*/
int
Student_SearchByIndex(char
id[])
{
int
i;
for
(i=0;i<num;i++)
{
if
(strcmp(students[i].ID,id)==0)
{
return
i;
}
}
return
-1;
}
/*通過姓名返回數組下標*/
int
Student_SearchByName(char
name[])
{
int
i;
for
(i=0;i<num;i++)
{
if
(strcmp(students[i].Name,name)==0)
{
return
i;
}
}
return
-1;
}
/*顯示單條學生記錄*/
void
Student_DisplaySingle(int
index)
{
printf("%10s%10s%8s%8s%8s%10s\n","學號","姓名","成績","成績","成績","平均成績");
printf("-------------------------------------------------------------\n");
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[index].ID,students[index].Name,
students[index].Mark1,students[index].Mark2,students[index].Mark3,students[index].Average);
}
/*插入學生信息*/
void
Student_Insert()
{
while(1)
{
printf("請輸入學號:");
scanf("%s",&students[num].ID);
getchar();
printf("請輸入姓名:");
scanf("%s",&students[num].Name);
getchar();
printf("請輸入成績:");
scanf("%f",&students[num].Mark1);
getchar();
printf("請輸入成績:");
scanf("%f",&students[num].Mark2);
getchar();
printf("請輸入成績:");
scanf("%f",&students[num].Mark3);
getchar();
students[num].Average=Avg(students[num]);
num++;
printf("是否繼續?(y/n)");
if
(getchar()=='n')
{
break;
}
}
}
/*修改學生信息*/
void
Student_Modify()
{
float
mark1,mark2,mark3;
while(1)
{
char
id[20];
int
index;
printf("請輸入要修改的學生的學號:");
scanf("%s",&id);
getchar();
index=Student_SearchByIndex(id);
if
(index==-1)
{
printf("學生不存在!\n");
}
else
{
printf("你要修改的學生信息為:\n");
Student_DisplaySingle(index);
printf("--
請輸入新值--\n");
printf("請輸入學號:");
scanf("%s",&students[index].ID);
getchar();
printf("請輸入姓名:");
scanf("%s",&students[index].Name);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark1);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark2);
getchar();
printf("請輸入成績:");
scanf("%f",&students[index].Mark3);
getchar();
students[index].Average=Avg(students[index]);
}
printf("是否繼續?(y/n)");
if
(getchar()=='n')
{
break;
}
}
}
/*刪除學生信息*/
void
Student_Delete()
{
int
i;
while(1)
{
char
id[20];
int
index;
printf("請輸入要刪除的學生的學號:");
scanf("%s",&id);
getchar();
index=Student_SearchByIndex(id);
if
(index==-1)
{
printf("學生不存在!\n");
}
else
{
printf("你要刪除的學生信息為:\n");
Student_DisplaySingle(index);
printf("是否真的要刪除?(y/n)");
if
(getchar()=='y')
{
for
(i=index;i<num-1;i++)
{
students[i]=students[i+1];
}
num--;
}
getchar();
}
printf("是否繼續?(y/n)");
if
(getchar()=='n')
{
break;
}
}
}
/*按姓名查詢*/
void
Student_Select()
{
while(1)
{
char
name[20];
int
index;
printf("請輸入要查詢的學生的姓名:");
scanf("%s",&name);
getchar();
index=Student_SearchByName(name);
if
(index==-1)
{
printf("學生不存在!\n");
}
else
{
printf("你要查詢的學生信息為:\n");
Student_DisplaySingle(index);
}
printf("是否繼續?(y/n)");
if
(getchar()=='n')
{
break;
}
}
}
/*按平均值排序*/
void
Student_SortByAverage()
{
int
i,j;
struct
Student
tmp;
for
(i=0;i<num;i++)
{
for
(j=1;j<num-i;j++)
{
if
(students[j-1].Average<students[j].Average)
{
tmp=students[j-1];
students[j-1]=students[j];
students[j]=tmp;
}
}
}
}
/*顯示學生信息*/
void
Student_Display()
{
int
i;
printf("%10s%10s%8s%8s%8s%10s\n","學號","姓名","成績","成績","成績","平均成績");
printf("-------------------------------------------------------------\n");
for
(i=0;i<num;i++)
{
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,
students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);
}
}
/*將學生信息從文件讀出*/
void
IO_ReadInfo()
{
FILE
*fp;
int
i;
if
((fp=fopen("Database.txt","rb"))==NULL)
{
printf("不能打開文件!\n");
return;
}
if
(fread(&num,sizeof(int),1,fp)!=1)
{
num=-1;
}
else
{
for(i=0;i<num;i++)
{
fread(&students[i],sizeof(struct
Student),1,fp);
}
}
fclose(fp);
}
/*將學生信息寫入文件*/
void
IO_WriteInfo()
{
FILE
*fp;
int
i;
if
((fp=fopen("Database.txt","wb"))==NULL)
{
printf("不能打開文件!\n");
return;
}
if
(fwrite(&num,sizeof(int),1,fp)!=1)
{
printf("寫入文件錯誤!\n");
}
for
(i=0;i<num;i++)
{
if
(fwrite(&students[i],sizeof(struct
Student),1,fp)!=1)
{
printf("寫入文件錯誤!\n");
}
}
fclose(fp);
}
/*主程序*/
main()
{
int
choice;
IO_ReadInfo();
while(1)
{
/*主菜單*/
printf("\n------
學生成績管理系統------\n");
printf("1.
增加學生記錄\n");
printf("2.
修改學生記錄\n");
printf("3.
刪除學生記錄\n");
printf("4.
按姓名查詢學生記錄\n");
printf("5.
按平均成績排序\n");
printf("6.
退出\n");
printf("請選擇(1-6):");
scanf("%d",&choice);
getchar();
switch(choice)
{
case
1:
Student_Insert();
break;
case
2:
Student_Modify();
break;
case
3:
Student_Delete();
break;
case
4:
Student_Select();
break;
case
5:
Student_SortByAverage();
Student_Display();
break;
case
6:
exit();
break;
}
IO_WriteInfo();
}
}
你的串號我已經記下，採納後我會幫你製作
⑻ c語言程序設計 學生成績管理
已發送，請注意查收：
一、
程序的設計任務與功能：輸入幾組學生的信息按總成績大小排序後輸出，並輸出各科成績的平均值.
二、
動態定義了一個二維數組，可以根據用戶的需要確定大小。
在定義二維數組是，每一維都比實際大一，分別用來儲蓄每個學生的總成績與各科平均值。
主要演算法在於一個冒泡排序，此冒泡排序是以每個學生的信息為單位處理的。
#include<stdio.h>
void main()
{
int n,m,i,j,c; /*n、m分別表示二維數組大小（實際更大），由用戶輸入，i、j做為輸出數組數值時的下標*/
puts("請輸入學生數n（n<=1000）和課程數m（m<=10）");
scanf("%d%d",&n,&m);
int **a=new int*[n+1];
for(i=0;i<=n;i++)
a[i]=new int[m+1];//完成了二維數組的動態賦值。
for(i=0;i<n;i++) //信息錄入
{
for(j=0;j<m;j++)
scanf("%d",&a[i][j]);
}
for(i=0;i<n;i++) //將每個學生的各科成績相加
{
a[i][m]=0;
for(j=0;j<m;j++)
a[i][m]+=a[i][j];
}
for(i=0;i<m;i++) //各科總成績初始化為0
a[n][i]=0;
for(i=n;i>1;i--) //冒泡排序，按總成績大小給學生排序
for(j=0;j<i-1;j++)
if(a[j][m]>a[j+1][m])
for(c=0;c<=m;c++)
{
int temp;
temp=a[j][c];
a[j][c]=a[j+1][c];
a[j+1][c]=temp;
}
puts("輸出為：");
for(i=n-1;i>=0;i--) //輸入排序後的學生成績
{
for(j=0;j<m;j++)
{
printf("%5d",a[i][j]);
a[n][j]+=a[i][j];
}
puts("");
}
for(i=0;i<m;i++) //輸出各科總成績平均值
printf("%5.1f",1.0*a[n][i]/n);
puts("");
}
⑼ c語言學生成績管理
使用結構體存儲每個學生的信息，然後用簡單選擇排序或冒泡排序將平均成績排序