加载中…C程序（学生管理系统）
(2014-05-30 23:07:37)
标签：
文化 |
//#include
//using namespace std;
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "Conio.h"
//#include
#define closegr closegraph
struct student
{
char num[10];
char name[15];
int cgrade;
int mgrade;
int egrade;
int total;
float ave;
};
typedef struct node
{
struct student data;
struct node *next;
}Node,*Link;
//#include "stdio.h"
//#include "stdlib.h"
//#include "string.h"
//#include "Conio.h"
//#include "graphics.h"
//#define closegr closegraph
void initgr(void)
{
int gd = DETECT, gm = 0;
registerbgidriver(EGAVGA_driver);
initgraph(&gd, &gm, " ");
}
void drawmat(char *mat,int matsize,int x,int y,int color)
{
int i, j, k, n;
n = (matsize - 1) / 8 + 1;
for(j = 0; j < matsize; j++)
for(i = 0; i < n; i++)
for(k = 0;k < 8; k++)
if(mat[j * n + i] & (0x80 >> k))
putpixel(x + i * 8 + k, y + j, color);
}
int shoudsave=0;
struct student
{
char num[10];
char name[15];
int cgrade;
int mgrade;
int egrade;
int total;
float ave;
char neartime[10];
};
void printstart()
{
printf("-----------------------------------------------------------------------\n");
}
void Wrong()
{
printf("\n=====>提示:输入错误!\n");
}
void Nofind()
{
printf("\n=====>提示:没有找到该学生!\n");
}
void printc()
{
printf(" 学号
姓名
性别 英语成绩 数学成绩
C语言成绩 总分 平均分\n");
}
void printe(Node *p)
{
printf("%-12s%s\t\t%s\t%d\t%d\t%d\t%d\t%d\n",p->data.num,p->data.name,p->data.sex,p->data.egrade,p->data.mgrade,p->data.cgrade,p->data.totle,p->data.ave);
}
Node* Locate(Link l,char findmess[],char nameornum[])
void main()
{
Link l;
FILE *fp;
int select;
char ch;
int count=0;
Node *p,*r;
l=(Node*)malloc(sizeof(Node));
l->next=NULL;
r=l;
fp=fopen("C:\\student","rb");
if(fp==NULL)
{
printf("\n=====>提示:文件还不存在，是否创建？(y/n)\n");
scanf("%c",&jian);
if(jian=='y'||jian=='Y')
fp=fopen("C:\\student","wb");
else
exit(0);
}
printf("\n=====>提示:文件已经打开,正在导入记录......\n");
while(!feof(fp))
{
p=(Node*)malloc(sizeof(Node));
if(fread(p,sizeof(Node),1,fp))
{
p->next=NULL;
r->next=p;
r=p;
count++;
}
}
fclose(fp);
printf("\n=====>提示:记录导入完毕,共导入%d条记录.\n",count);
while(1)
{
menu();
printf("请你选择操作:");
scanf("%d",&sel);
if(sel==0)
{
if(shoudsave==1)
{
getchar();
printf("\n=====>提示:资料已经改动,是否将改动保存到文件中(y/n)?\n");
scanf("%c",&ch);
if(ch=='y'||ch=='Y')
Save(l);
}
printf("\n=====>谢谢使用！\n");
break;
}
switch(sel)
{
case 1:Add(l);
break;
case 2:Del(l);
break;
case 3:Qur(l);
break;
case 4:Modify(l);
break;
case 5:Disp(l);
break;
case 6:Tongji(l);
break;
case 7:Sort(l);
break;
case 8:Save(l);
break;
default: Wrong();
printf("\n=====>提示:输入错误!\n");
getchar();
getchar();
break;
}
}
}
char menu( void )
{
char choice;
clrscr();
gotoxy( 17 , 5 );
printf(" =================主菜单===================");
gotoxy(17 , 6);
printf(" ==
1 输入学生信息
==");
gotoxy(17 , 7);
printf(" ==
2 删除学生信息
==");
gotoxy(17 , 8);
printf(" ==
3 查询学生信息
==");
gotoxy(17 , 9);
printf(" ==
4 修改学生信息
==");
gotoxy(17 , 10);
printf(" ==
5 显示学生信息
==");
gotoxy(17 , 11);
printf(" ==
6 统计学生信息
==");
gotoxy(17 , 12);
printf(" ==
7 排序学生信息
==");
gotoxy(17 , 13);
printf(" ==
8 保存学生信息
==");
gotoxy(17 , 14);
printf(" ==
0 退出系统
==");
gotoxy(17 , 15);
printf(" ==========================================");
}
Node* Locate(Link l,char findmess[],char nameornum[])
{
Node *r;
if(strcmp(nameornum,"num")==0)
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.num,findmess)==0)
return r;
r=r->next;
}
}
else
if(strcmp(nameornum,"name")==0)
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.name,findmess)==0)
return r;
r=r->next;
}
}
return 0;
//} return 0;
}
void Add(Link l)
{
Node *p,*r,*s;
char num[15];
r=l;
s=l->next;
while(r->next!=NULL)
r=r->next;
while(1)
{
printf("请你输入学号(以'0'返回上一级菜单:)");
scanf("%s",num);
if(strcmp(num,"0")==0)
break;
while(s)
{
if(strcmp(s->data.num,num)==0)
{
printf("=====>提示:学号为'%s'的学生已经存在,若要修改请你选择'4?修改'!\n",num);
printstart();
printc();
printe(s);
printstart();
printf("\n");
return;
}
s=s->next;
}
p=(Node *)malloc(sizeof(Node));
strcpy(p->data.num,num);
printf("请你输入姓名:");
scanf("%s",p->data.name);
getchar();
printf("请你输入性别:");
scanf("%s",p->data.sex);
getchar();
printf("请你输入c语言成绩:");
scanf("%d",&p->data.cgrade);
getchar();
printf("请你输入数学成绩:");
scanf("%d",&p->data.mgrade);
getchar();
printf("请你输入英语成绩:");
scanf("%d",&p->data.egrade);
getchar();
p->data.totle=p->data.egrade+p->data.cgrade+p->data.mgrade;
p->data.ave=p->data.totle / 3;
p->next=NULL;
r->next=p;
r=p;
shoudsave=1;
}
}
}
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