求学生管理系统C语言程序

答案：include "stdio.h" /*I/O函数*/ 
#include "stdlib.h" /*其它说明*/ 
#include "string.h" /*字符串函数*/ 
#include "conio.h" /*屏幕操作函数*/ 
#include "mem.h" /*内存操作函数*/ 
#include "ctype.h" /*字符操作函数*/ 
#include "alloc.h" /*动态地址分配函数*/ 
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'||ch=='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); /*移动光标*/ 
textcolor(YELLOW); /*设置文本显示颜色为黄色*/ 
textbackground(BLUE); /*设置背景颜色为蓝色*/ 
window(1,1,99,99); /* 制作显示菜单的窗口，大小根据菜单条数设计*/ 
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; 
} 
} 
}

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