学生成绩管理系统-vs汇编

#include

#include

#include

#include

#include

#define LEN sizeof(struct student)

#define FORMAT "%-8d%-15s%-12.1lf%-12.1lf%-12.1lf%-12.1lf\n"

#define DATA stu[i].num,stu[i].name,stu[i].elec,stu[i].expe,stu[i].requ,stu[i].sum float Ielec,Iexpe,Irequ;

float Felec,Fexpe,Frequ;

struct student/*定义学生成绩结构体*/

{

int num;/*学号*/

char name[15];/*姓名*/

double elec;/*选修课*/

double expe;/*实验课*/

double requ;/*必修课*/

double sum;/*总分*/

};

struct student stu[50];/*定义结构体数组*/

void input();/*录入学生成绩信息*/

void show();/*显示学生信息*/

void sort();/*按总分排序*/

void del();/*删除学生成绩信息*/

void modify();/*修改学生成绩信息*/

void menu();/*主菜单*/

void insert();/*插入学生信息*/

void total();/*计算总人数*/

void search();/*查找学生信息*/

main()

{

int n;

menu();

scanf("%d",&n);

while(n)

{

switch(n)

{

case 1: input();break;

case 2: search();break;

case 3: del(); break;

case 4: modify();break;

case 5: insert();break;

case 6: sort();break;

case 7: total();break;

default: break;

}

menu();

scanf("%d",&n);

}

}

void show()

{

FILE *fp;

int i,m=0;

fp=fopen("d:\\data.txt","ab+");

while(!feof(fp))

{

if(fread(&stu[m] ,LEN,1,fp)==1)

m++;

}

fclose(fp);

printf("number name elective experiment required sum\t\n");

for(i=0;i

{

printf(FORMAT,DATA);/*将信息按指定格式打印*/

}

}

void menu()

{

system("cls");

printf("\n");

printf("\n");

printf("\t|--------------------Student management system--------------------|\n");

printf("\t| |\n");

printf("\t| 0. exit |\n");

printf("\t| |\n");

printf("\t| 1. input record |\n");

printf("\t| |\n");

printf("\t| 2. search record |\n");

printf("\t| |\n");

printf("\t| 3. delete record |\n");

printf("\t| |\n");

printf("\t| 4. modify record |\n");

printf("\t| |\n");

printf("\t| 5. insert record |\n");

printf("\t| |\n");

printf("\t| 6. order |\n");

printf("\t| |\n");

printf("\t| 7. number |\n");

printf("\t| |\n");

printf("\t|-----------------------------------------------------------------|\n"); printf("\n");

printf("\n");

printf(" choose( 0 ~ 7 ):");

}

void input()

{

int i,m=0;

char ch[2];

FILE *fp;

if((fp=fopen("d:\\data.txt","ab+"))==NULL) /*打开指定文件*/

{

printf("can not open\n");

return; /*返回主函数*/

}

while(!feof(fp)) /*feof()函数是用来判断指针是否已经到达文件尾部的，

若指针指向文件末尾，则返回值为“真”，返回。*/ {

if(fread(&stu[m],LEN,1,fp)==1)

m++; /*统计当前记录条数*/

}

fclose(fp);

if(m==0)

printf("No record!\n");

else

{

system("cls");

show(); /*调用show函数，显示原有信息*/

}

if((fp=fopen("d:\\data.txt","wb"))==NULL)

{

printf("can not open\n");

return;

}

for(i=0;i

fwrite(&stu[m],LEN,1,fp); /*向指定磁盘文件写入信息*/

printf("please input (y/n):/n");

scanf("%s",&ch);

if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)

{

printf("please input per centum:");

printf("\nelective:");

scanf("%f",&Ielec);

printf("/nexperiment:");

scanf("%f",&Iexpe);

printf("/nrequired course:");

scanf("%f",&Irequ);

}

while(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)

{

printf("number:");

scanf("%d",&stu[m].num); /*输入学生学号*/

for(i=0;i

if(stu[i].num==stu[m].num)

{

printf("the number is existing,press any to continue!");

getch();

fclose(fp);

return;

}

printf("name:");

scanf("%s",&stu[m].name); /*输入学生姓名*/

printf("elective:");

scanf("%lf",&stu[m].elec); /*输入选修课成绩*/

printf("experiment:");

scanf("%lf",&stu[m].expe); /*输入实验课成绩*/

printf("required course:");

scanf("%lf",&stu[m].requ); /*输入必修课成绩*/

stu[m].sum=stu[m].elec*Ielec+stu[m].expe*Iexpe+stu[m].requ*Irequ; /*计算出总成绩*/

if(fwrite(&stu[m],LEN,1,fp)!=1) /*将新录入的信息写入指定的磁盘文件*/

{

printf("can not save!");

getch();

}

else

{

printf("%s saved!\n",stu[m].name);

m++;

}

printf("continue?(y/n):"); /*询问是否继续*/

scanf("%s",ch);

}

fclose(fp);

printf("OK!\n");

}

void search() /*自定义查找函数*/

{

FILE *fp;

int snum,i,m=0;

char ch[2];

if((fp=fopen("d:\\data.txt","ab+"))==NULL)

{

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++;

if(m==0)

{

printf("no record!\n");

return;

}

printf("please input the number:");

scanf("%d",&snum); /*输入需要查找学生的学号*/

for(i=0;i

if(snum==stu[i].num) /**查找出入的学号是否在记录中*/

{

printf("find the student,show?(y/n)");

scanf("%s",ch);

if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)

{

printf("number name elective experiment required sum\t\n");

printf(FORMAT,DATA); /*将查找出得结果按指定格式输出*/

break;

}

}

if(i==m)

printf("can not find the student!\n"); /*没有找到要查额信息*/ system("pause");

}

void modify() /*自定义修改函数*/

{

int i,j,snum,m=0;

FILE *fp;

if((fp=fopen("d:\\data.txt","ab+"))==NULL)

{

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++;

if(m==0)

{

printf("no record!\n");

fclose(fp);

return;

}

printf("please input the number of the student which do you want to modify!\n");

scanf("%d",&snum);

for(i=0;i

if(snum==stu[i].num) /*检索记录中是否有要修改的信息*/

break;

if(i

{

printf("find the student! you can modify now!\n");

printf("please input per centnm:");

printf("\nelective:");

scanf("%f",&Ielec);

printf("\nexperiment:");

scanf("%f",&Iexpe);

printf("\nrequired course:");

scanf("%f",&Irequ);

printf("name:\n");

scanf("%s",&stu[i].name);

printf("\nelective:");

scanf("%lf",&stu[i].elec);

printf("\nexperiment:");

scanf("%lf",&stu[i].expe);

printf("\nrequired course:");

scanf("%lf",&stu[i].requ);

stu[i].sum=stu[i].elec*Ielec+stu[i].expe*Iexpe+stu[i].requ*Irequ;

}

else

{

printf("can not find!");

getch();

return;

}

if((fp=fopen("d:\\data.txt","wb"))==NULL)

{

printf("can not open\n");

return;

}

for(j=0;j

if(fwrite(&stu[j],LEN,1,fp)!=1)

{

printf("can not save!");

getch();

}

fclose(fp);

}

void del() /*自定义删除函数*/

{

int snum,i,j,m=0;

char ch[2];

FILE *fp;

if((fp=fopen("d:\\data.txt","ab+"))==NULL)

{

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++;

fclose(fp);

if(m==0)

{

printf("no record!\n");

return;

}

printf("please input the number:");

scanf("%d",&snum);

for(i=0;i

if(snum=stu[i].num)

break;

printf("find the student,delete?(y/n)");

scanf("%s",ch);

if(strcmp(ch,"y")==0||strcmp(ch,"Y")==0)

for(j=i;j

stu[j]=stu[j+1];

m--;

if((fp=fopen("d:\\data.txt","wb"))==NULL)

{

printf("can not open\n");

return;

}

for(j=0;j

if(fwrite(&stu[j],LEN,1,fp)!=1) /*将更改后的记录重新写入指定的磁盘文件中*/

{

printf("can not save!\n");

getch();

}

fclose(fp);

printf("delete successfully!\n");

}

void insert() /*自定义插入函数*/

{

int i,j,k,snum,m=0;

FILE *fp;

if((fp=fopen("d:\\data.txt","ab+"))==NULL)

{

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++;

if(m==0)

{

printf("no record!\n");

fclose(fp);

return;

}

printf("please input the position where you want to insert!\n");

scanf("%d",&snum); /*输入要插入的位置*/

for(i=0;i

if(snum==stu[i].num)

break;

for(j=m-1;j>i;j--)

stu[j+1]=stu[j]; /*从最后一条记录开始均向后移一位*/ printf("please input the new information:\n");

printf("number:");

scanf("%d",&stu[i+1].num);

for(k=0;k

if(stu[k].num==stu[i+1].num&&k!=i+1)

{

printf("the number is existing,press any to continue!");

getch();

fclose(fp);

return;

}

printf("please input per centum:");

printf("\nelective:");

scanf("%f",&Felec);

printf("\nexperiment:");

scanf("%f",&Fexpe);

printf("\nrequired course:");

scanf("%f",&Frequ);

printf("name:\n");

scanf("%s",&stu[i+1].name);

printf("\nelective:");

scanf("%lf",&stu[i+1].elec);

printf("\nexperiment:");

scanf("%lf",&stu[i+1].expe);

printf("\nrequired course:");

scanf("%lf",&stu[i+1].requ);

stu[i+1].sum=stu[i+1].elec*Felec+stu[i+1].expe*Fexpe+stu[i+1].requ*Frequ; /*计算总成绩*/

if((fp=fopen("d:\\data.txt","wb"))==NULL)

{

printf("can not open\n");

return;

}

for(k=0;k<=m;k++)

if(fwrite(&stu[k],LEN,1,fp)!=1) /*将修改后的记录写入磁盘中*/

{

printf("can not save!");

getch();

}

fclose(fp);

}

void sort() /*自定义排名函数*/

{

struct student temp;

FILE *fp;

int i,j,m=0;

if((fp=fopen("d:\\data.txt","ab+"))==NULL) /*判断文件是否打开成功*/ {

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++; /*统计学生个数*/ if(m==0)

{

printf("no record!\n");

fclose(fp);

return;

}

for(i=0;i

for(j=i+1;j

if(stu[j].sum>stu[i].sum)

{

temp=stu[i];

stu[i]=stu[j];

stu[j]=temp;

}

for(i=0;i

if(fwrite(&stu[i],LEN,1,fp)!=1)

{

printf("can not save!");

getch();

return;

}

fclose(fp);

}

void total() /*自定义统计学生人数函数*/

{

FILE *fp;

int m=0;

if((fp=fopen("d:\\data.txt","ab+"))==NULL) /*判断文件是否打开成功*/ {

printf("can not open\n");

return;

}

while(!feof(fp))

if(fread(&stu[m],LEN,1,fp)==1)

m++; /*统计学生个数*/ if(m==0)

{

printf("no record!\n");

fclose(fp);

return;

}

printf("the class are %d students!\n"); /*将统计的个数输出*/

fclose(fp);

}