语言课程设计学生成绩管理系统

学生成绩管理系统

《学生成绩管理系统》旳设计与实现汇报内容1、每一条记录包括一种学生旳学号、姓名、3门课成绩、平均成绩。2、输入功能：可以一次完毕若干条记录旳输入。3、显示功能：完毕所有学生记录旳显示。4、查找功能：完毕按姓名查找学生记录，并显示。5、排序功能：按学生平均成绩进行排序。6、插入功能：按平均成绩高下插入一条学生记录7

删除功能：假如输入错误，可以删除学生记录；8

退出。代码如下:#include"stdio.h"

#include"conio.h"

#include"string.h"

intn=0;

structstudent

{intnum;

charname[10];

intscore[3];

floatavg;

}stu[1000];main()

{

for(;;)

{

{switch(print())

{

case0:printf("\n\nPlease,choosethenumberform1to8\n");break;

case1:creat();break;

case2:display();break;

case3:find();break;

case4:sort();break;

case5:add();break;

case6:del();break;

case7:save();break;

case8:exit(0);}

printf("\n\n\n

putanykeytothemenu.....\n");

}

getch();

}

}

print()

{chars[3];

intc;

clrscr();

printf("\n\n\n

***************MENU**************\n");

printf("

||

||\n");

printf("

||

1Increasetherecord

||\n");

printf("

||

||\n");

printf("

||

2Showallrecords

||\n");

printf("

||

||

the\n");

printf("

||

3searchtherecord

||\n");

printf("

||

||

result\n");

printf("

||

4Sortrecords

||\n");

printf("

||

||

management\n");

printf("

||

5Insertrecord

||\n");

printf("

||

||\n");

printf("

||

6Deletearecord

||\n");

printf("

||

||\n");printf("

||

7Savethefile

||\n");

printf("

||

||\n");

printf("

||

8Quit

||

~@~shen..\n");

printf("

||

||

\n");

printf("

*********************************\n");

do{printf("\n

Enteryouchoice(1~8):");

scanf("%s",s);

c=atoi(s);

}while(c<0||c>8);

return(c);

}creat()

{inti;FILE*fp;

clrscr();

printf("Howmanystudentstorecord?(1~1000)\n");

scanf("%d",&n);

printf("\nNO.:name:score1:score2:score3:\n");

for(i=0;i

{

scanf("%d%s%d%d%d",&stu[i].num,stu[i].name,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2]);

stu[i].avg=(float)(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3;

}

if((fp=fopen("score","wb"))==NULL)

{printf("Error,cannotopenfile\n");

return;

}

for(i=0;i

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

printf("filewriteerror\n");

fclose(fp);}display()

{inti,p=1;

FILE*fp;

clrscr();

if((fp=fopen("score","rb"))==NULL)

{printf("\n\n

Please,increaserecordsfirst~!!\n");

return;

}

printf("\n\n

NO.:name:

score1:

2:

3:

average:\n");

for(i=0;!feof(fp);i++)

{fread(&stu[i],sizeof(structstudent),1,fp);

if(stu[i].num!=0)

{printf("%5d

%-10s%4d%4d%4d%8.2f\n",stu[i].num,stu[i].name,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].avg);

if(i==20*p){printf("putsanykeytonextpag..");getch();p++;}

}

}fclose(fp);}find()

{charc[10];inti;FILE*(fp);

if((fp=fopen("score","rb"))==NULL)

{printf("Error,cannotopenfile\n");

return;}

for(i=0;!feof(fp);i++)

fread(&stu[i],sizeof(structstudent),1,fp);

fclose(fp);printf("inputthenameforsearch:\n");

scanf("%s",c);

clrscr();

printf("\n\n

NO.:name:

score1:

2:

3:

average:\n");

for(n=i,i=0;i

{if(strcmp(c,stu[i].name)==0){printf("%4d

%-10s%4d%4d%4d%8.2f\n",stu[i].num,stu[i].name,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].avg);break;}

elseif(i==n-1)printf("\n

Error~~!!\n

Nothisstudent\n");

}}add()

{inti;FILE*fp;chary;

clrscr();

printf("Howmanystudentstoinsert\n");

scanf("%d",&n);

printf("\nNO.:name:score1:score2:score3:\n");

for(i=0;i

{

scanf("%d%s%d%d%d",&stu[i].num,stu[i].name,&stu[i].score[0],&stu[i].score[1],&stu[i].score[2]);

stu[i].avg=(float)(stu[i].score[0]+stu[i].score[1]+stu[i].score[2])/3;

}

if((fp=fopen("score","ab"))==NULL)

{printf("Error,cannotopenfile\n");

return;

}

for(i=0;i

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

printf("filewriteerror\n");

fclose(fp);

printf("\n\nDoyouwanttosort??y/n?");

scanf("%s",&y);

if(y=='Y'||y=='y')sort();}

save()

{inti;FILE*fp;

if((fp=fopen("score","wb"))==NULL)

{printf("Error,cannotopenfile\n");

return;

}

for(i=0;i

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

printf("filewriteerror\n");

fclose(fp);

}load()

{FILE*fp;inti;

if((fp=fopen("score","rb"))==NULL)return;

for(i=0;!feof(fp);i++)

fread(&stu[i],sizeof(structstudent),1,fp);

fclose(fp);

}sort()

{inti,j,k,t;floatp;FILE*fp;chartemp[10];

if((fp=fopen("score","rb"))==NULL)

{printf("Error,cannotopenfile\n");

return;}

for(i=0;!feof(fp);i++)

fread(&stu[i],sizeof(structstudent),1,fp);

fclose(fp);

for(n=i,i=0;i

{k=i;

for(j=k+1;j

if(stu[k].avg

{k=j;

t=stu[k].num;

stu[k].num=stu[i].num;

stu[i].num=t;

strcpy(temp,stu[k].name);

strcpy(stu[k].name,stu[i].name);

strcpy(stu[i].name,temp);

t=stu[k].score[0];

stu[i].score[0]=t;

t=stu[k].score[1];

stu[k].score[1]=stu[i].score[1];

stu[i].score[1]=t;

t=stu[k].score[2];

stu[k].score[2]=stu[i].score[2];

stu[i].score[2]=t;

p=stu[k].avg;

stu[k].avg=stu[i].avg;

stu[i].avg=p;

}

}

clrscr();

printf("\n\n

NO.:name:

score1:

2:

3:

average:\n");

for(i=0;i

if(stu[i].num!=0)

printf("%5d

%-10s%4d%4d%4d%8.2f\n",stu[i].num,stu[i].name,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].avg);

}del()

{inti,x;charc[10],y;FILE*fp;

if((fp=fopen("score","rb"))==NULL)

{printf("Error,cannotopenfile\n");

return;}

clrscr();

printf("\n

NO.:name:

score1:

2:

3:

average:\n");

for(i=0;!feof(fp);i++)

{fread(&stu[i],sizeof(structstudent),1,fp);

if(stu[i].num!=0)printf("%5d

%-10s%4d%4d%4d%8.2f\n",stu[i].num,stu[i].name,stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].avg);

}

fclose(fp);

printf("inputthenamefordelete\n");

scanf("%s",c