zhfq 发布留言 2008-10-20 19:36 我用C做的学生成绩管理想在VC6.0中运行可...........大家来看看吧#include
#include
#include
#include /*包含getch*/
typedef struct student
{
int position;/*序号*/
char num[15];/*学号*/
char name[20];/*姓名*/
char sex;/*性别*/
int chinese;/*语文成绩*/
int math;/*数学*/
int english;/*英语*/
float ave;/*平均*/
struct student *next;
}stu;
stu* head;
char password[]="123";
void main()
{
char choice;
stu *p;
char s[10];
int flag=0,i,k=3;
system("cls");
while(k>0)
{
printf("\n\n\nenter password:(123):");
scanf("%s",s);
if(!strcmp(s,password))
{
printf("pass\n");
flag=1;printf("press any key!");
getch();
getchar();
system("cls");
break;
}
else
{
printf("error enter again!\n");
k--;
}
}
if(!flag)
{
printf("you have enter 3 times!");
getch();exit(0);
}
printf("\n\n\n\n\t\twhether enter the systerm Yes or No?\n");
scanf("%c",&choice);
if(choice=='n'||choice=='N')
exit(0);
system("cls");
while(1)
{ printf("===================\t\t\t ===========================");
printf("\t\t\t\t wecome to the systerm\n");
printf("\nauthor:zhao\tmajor:computer\tnum:2074020029\n\n\n");
print();
printf("\nenter choice(0-10):");
scanf("%d",&i);
/*system("cls");*/
if(i<0||i>10)
{
printf("enter number from 0 to 9\nplease inter again:");
scanf("%d",&i);
}
system("cls");
switch(i)
{
case 1: create();
break;
case 2: lookdata() ;
break;
case 3: insert();
break;
case 4: find();
break;
case 5: change();
break;
case 6: avesubject();
break;
case 7: save(head);
break;
case 8: delet();
break;
case 9: order();
break;
case 10: load();
break;
case 0: exit(0);
break;
}
printf("press any key to continue!\n");
getch();
system("cls");
}
}
/*typedef struct student stu ;*/
void create();/**建立人员数据*/
void lookdata();/**查看全部数据*/
void get(stu *p);/**输入每个学生的数据**/
void insert();/*插入数据*/
void find();/**查找*/
void change();/*修改*/
void avesubject();
void save (stu *p);/**保存数据**/
void lookone(stu* x);/**显示某个人的数据**/
void delet();
void order();
void load();
void cmeaverage();
void caverage();/**中文平均值**/
void maverage();/**数学平均值**/
void eaverage();/**平均值**/
void print();
void sort(stu *p1,stu *p2);
void ordera();
void orderc();
void orderm();
void ordere();
//===========================================================
void get(stu *p)/**输入每个学生的数据**/
{
float sum;
static int n=0;
printf("input num:");
gets(p->num);
while(1)
{
++n;
if(n==1) break;
else
{
stu *p2=head;
while(strcmp(p2->num,p->num)&&p2!=NULL)
p2=p2->next;
if(p2==NULL) break;
if(strcmp(p2->num,p->num)) break;
else
{
printf("this number has existed please input agian!\n");
gets(p->num);
}
}
}
printf("input name:");
gets(p->name);
for(p->sex='t';p->sex!='m'&&p->sex!='M'&&p->sex!='f'&&p->sex!='F';)
{
printf("input sex:");
scanf("%c",&p->sex);
getchar();
}
printf("input chinese:");
scanf("%d",&p->chinese);
for(;p->chinese<0||p->chinese>100;)
{
printf("please input again:");
scanf("%d",&p->chinese);
}
printf("input math:");
scanf("%d",&p->math);
for(;p->math<0||p->math>100;)
{
printf("please input 输入again:");
scanf("%d",&p->math);
}
printf("input english:");
scanf("%d",&p->english);
for(;p->english<0||p->english>100;)
{
printf("please input again:");
scanf("%d",&p->english);
}
getchar();
sum=(float)(p->chinese+p->math+p->english);
p->ave=sum/3;
p->position=0;
}
void create()/**建立人员数据*/
{
int k=0;
char ch='y';
stu *p1,*p2;
p2=p1=(stu *)malloc(sizeof(stu));
while(ch!='n'&&ch!='N')
{
printf("if you want to enter the data 'y' or 'n'");
scanf("%c",&ch);
getchar();
if(ch=='n'||ch=='N')
break;
get(p1);
k++;
if(k==1) head=p1;
else
p2->next=p1;
p2=p1;
p1=(stu *)malloc(sizeof(stu));
}
if(k==0) head=NULL;
p2->next=NULL;
}
void lookone(stu* x)/**显示某个人的数据**/
{
printf("position is:%d\n",x->position);
printf("num is:%s\n",x->num);
printf("name is:%-s\n",x->name);
printf("sex is:%c\n",x->sex);
printf("chinese is:%d\n",x->chinese);
printf("math is:%d\n",x->math);
printf("english is:%d\n",x->english);
printf("average score is:%5.1f\n",x->ave);
}
void find()/**查找*/
{ char n[15];
stu *p=head;
printf("input number:");
scanf("%s",n);
while(strcmp(p->num,n)&&p!=NULL)
p=p->next;
if(strcmp(p->num,n))
printf("not foud\n");
else
lookone(p);
}
void change()/*修改*/
{
char n[15];
stu *p=head;
printf("input number:");
scanf("%s",n);
getchar();
while(strcmp(p->num,n)&&p!=NULL)
p=p->next;
if(strcmp(p->num,n))
printf("not foud\n");
else
{
printf("you can input the data you want to change\n\n");
get(p);
}
}
void insert()/*插入数据*/
{
stu *p,*p1,*p2;
p=(stu *)malloc(sizeof(stu));
get(p);
p2=p1=head;
if(head==NULL)
head=p;
else
while(p1!=NULL&&p1->numnum)
{
p2=p1;
p1=p1->next;
}
if(p1==head)
{
head=p;
p->next=p2;
}
else
{
p2->next=p;
p->next=p1 ;
}
}
void caverage()/**中文平均值**/
{
int n=0;
stu *p=head;
int max=-32768,min=32767;
float ave=0,sum=0;
while(p!=NULL)
{
if(p->chinese>max)
max=p->chinese;
if(p->chinese min=p->chinese;
sum=sum+p->chinese;
p=p->next;
n++;
}
ave=sum/n;
printf("chinese:\n");
printf("max=%d\t",max);
printf("min=%d\t",min);
printf("average is:%5.1f\n\n",ave);
}
void maverage()/**数学平均值**/
{
int n=0;
stu *p=head;
int max=-32768,min=32767;
float ave=0,sum=0;
while(p!=NULL)
{
if(p->math>max)
max=p->math;
if(p->math min=p->math;
sum=sum+p->math;
p=p->next;
n++;
}
ave=sum/n;
printf("math:\n");
printf("max=%d\t",max);
printf("min=%d\t",min);
printf("average is:%5.2f\n\n",ave);
}
void eaverage()/**平均值**/
{
int n=0;
stu *p=head;
int max=-32768,min=32767;
float ave=0,sum=0;
while(p!=NULL)
{
if(p->english>max)
max=p->english;
if(p->english min=p->english;
sum=sum+p->english;
p=p->next;
n++;
}
ave=sum/n;
printf("english:\n");
printf("max=%d\t",max);
printf("min=%d\t",min);
printf("average is:%5.2f\n\n",ave);
}
void cmeaverage()
{
caverage();
maverage();
eaverage();
}
void avesubject()
{
int i=0;
printf("<1>chinese avrage score\n\n");
printf("<2>math average score\n\n");
printf("<3>english average score\n\n");
printf("<4>all subject average score\n\n");
printf("<5>exit\n");
printf("please enter your choice from 1 to 5 :");
while(1)
{
scanf("%d",&i);
if(i<1||i>5)
printf("enter again\n");
else
break;
}
system("cls");
switch(i)
{
case 1: caverage();break;
case 2: maverage();break;
case 3: eaverage();break;
case 4: cmeaverage();break;
case 5: return;
}
}
void lookdata()/**查看全部数据*/
{
stu *p=head;
printf("the student's data is:\n");
printf("position number\tname\t\tsex\tchinese\tmath\tenglish\taverage\n");
while(p!=NULL)
{
printf("NO.%d ",p->position);
printf("%10s\t",p->num);
printf("%-15s",p->name);
printf(" %c\t",p->sex);
printf("%d\t%d\t%d\t%5.1f\n\n",p->chinese,p->math,p->english,p->ave);
p=p->next;
}
}
void save (stu *p)/**保存数据**/
{
FILE *fp;
char file[10];
printf("enter file name:");
scanf("%s",file);
if((fp=fopen(file,"wb"))==NULL)
{
printf("cant open this file\n");
return;
}
while(p!=NULL)
{
fwrite(p,sizeof(stu),1,fp);
p=p->next;
}
fclose(fp);
}
void print()
{
printf("< 1>enter the data\n\n");
printf("< 2>display the data\n\n");
printf("< 3>insert data\n\n");
printf("< 4>fing someone\n\n");
printf("< 5>modify the data\n\n");
printf("< 6>look average score in every subject\n\n");
printf("< 7>save the data\n\n");
printf("< 8>delete one data\n\n");
printf("< 9>order the data\n\n");
printf("<10>load the data\n\n");
printf("< 0>exit");
}
void delet()
{
char n[15];
stu *p1,*p2;
char k;
printf("please input the number:");
scanf("%s",n);
getchar();
printf("Do you really want to delete this student 'y' or 'n'\n");
k=getchar();
if(k=='n'||k=='N') return;
while(k!='y'&&k!='Y')
{
printf("please chose 'y' or 'n' ");
k=getchar();
}
p2=p1=head;
if(head==NULL)
{
printf("have not found\n");
getch();
return;
}
if(strcmp(p1->num,n)==0)
{
head=p1->next;
return;
}
while(strcmp(p1->num,n)&&p1!=NULL)
{
p2=p1;
p1=p1->next;
}
if(p1==NULL)
{
printf("have not found");
return;
}
else
p2->next=p1->next;
printf("successfully delete this student\n");
return ;
}
void load()
{
FILE *fp;
stu *p1,*p2;
int m=0;
char filename[20];
printf("please input the file name:");
scanf("%s",filename);
if((fp=fopen(filename,"rb"))==NULL)
{
printf("cannot open this file\n");
return;
}
p2=p1=(stu *)malloc(sizeof(stu));
while(fread(p1,sizeof(stu),1,fp)==1)
{m++;
if(m==1)
head=p1;
else
{p2->next=p1;
p2=p1;
}
p1=(stu*)malloc(sizeof(stu));
}
p2->next=NULL;
fclose(fp);
}
void sort(stu *p1,stu *p2)
{
char s[20];char n[20];char x;
float c,m,e;
float f;
strcpy(s,p1->num);strcpy(p1->num,p2->num);strcpy(p2->num,s);
/*s=p1->num;p1->num=p2->num;p2->num=s;*/
strcpy(n,p1->name);strcpy(p1->name,p2->name);strcpy(p2->name,n);
x=p1->sex;p1->sex=p2->sex;p2->sex=x;
c=p1->chinese;p1->chinese=p2->chinese;p2->chinese=c;
m=p1->math;p1->math=p2->math;p2->math=m;
e=p1->english;p1->english=p2->english;p2->english=e;
f=p1->ave;p1->ave=p2->ave;p2->ave=f;
}
void ordera()
{
stu * p1,* p2;
int i=1;
if(head==NULL) return;
else
{
for(p1=head;p1!=NULL;p1=p1->next,++i)
for(p2=p1->next,p1->position=i;p2!=NULL;p2=p2->next)
if((p1->ave)<(p2->ave))
{
sort(p1,p2) ;
p2->position=i;
}
}
}
void ordern()/*按学号排序*/
{
stu * p1,* p2;
int i=1;
if(head==NULL) return;
else
{
for(p1=head;p1!=NULL;p1=p1->next,++i)
for(p2=p1->next,p1->position=i;p2!=NULL;p2=p2->next)
if(strcmp(p1->num,p2->num)>0)
{
sort(p1,p2) ;
p2->position=i;
}
}
}
void orderc()
{
stu * p1,* p2;
int i=1;
if(head==NULL) return;
else
{
for(p1=head;p1!=NULL;p1=p1->next,++i)
for(p2=p1->next,p1->position=i;p2!=NULL;p2=p2->next)
if((p1->chinese)<(p2->chinese))
{
sort(p1,p2) ;
p2->position=i;
}
}
}
void orderm()
{
stu * p1,* p2;
int i=1;
if(head==NULL) return;
else
{
for(p1=head;p1!=NULL;p1=p1->next,++i)
for(p2=p1->next,p1->position=i;p2!=NULL;p2=p2->next)
if((p1->math)<(p2->math))
{
sort(p1,p2) ;
p2->position=i;
}
}
}
void ordere()
{
stu * p1,* p2;
int i=1;
if(head==NULL) return;
else
{
for(p1=head;p1!=NULL;p1=p1->next,++i)
for(p2=p1->next,p1->position=i;p2!=NULL;p2=p2->next)
if((p1->english)<(p2->english))
{
sort(p1,p2) ;
p2->position=i;
}
}
}
void order()
{
int i;
printf("\n\n<1>order the data according to the number of student\n\n");
printf("<2>order the data according to the average score\n\n");
printf("<3>order the data according to the chinese score\n\n");
printf("<4>order the data according to the math score\n\n");
printf("<5>order the data according to the english score\n\n");
printf("<6>exit\n");
printf("enter the choice frome 1 to 6 :");
scanf("%d",&i);
if(i<0||i>6)
{
printf("please enter choice again:");
scanf("%d",&i);
}
switch(i)
{
case 1 :ordern();break;
case 2 :ordera();break;
case 3 :orderc();break;
case 4 :orderm();break;
case 5 :ordere();break;
case 6 :return;
}
system("cls");
}
-------------Configuration: A - Win32 Debug--------------------
Compiling...
A.C
D:\A.C(31) : error C2065: 'password' : undeclared identifier
D:\A.C(31) : warning C4047: 'function' : 'const char *' differs in levels of indirection from 'int '
D:\A.C(31) : warning C4024: 'strcmp' : different types for formal and actual parameter 2
D:\A.C(63) : warning C4013: 'print' undefined; assuming extern returning int
D:\A.C(75) : warning C4013: 'create' undefined; assuming extern returning int
D:\A.C(77) : warning C4013: 'lookdata' undefined; assuming extern returning int
D:\A.C(79) : warning C4013: 'insert' undefined; assuming extern returning int
D:\A.C(81) : warning C4013: 'find' undefined; assuming extern returning int
D:\A.C(83) : warning C4013: 'change' undefined; assuming extern returning int
D:\A.C(85) : warning C4013: 'avesubject' undefined; assuming extern returning int
D:\A.C(87) : warning C4013: 'save' undefined; assuming extern returning int
D:\A.C(89) : warning C4013: 'delet' undefined; assuming extern returning int
D:\A.C(91) : warning C4013: 'order' undefined; assuming extern returning int
D:\A.C(93) : warning C4013: 'load' undefined; assuming extern returning int
D:\A.C(108) : error C2371: 'create' : redefinition; different basic types
D:\A.C(111) : error C2371: 'insert' : redefinition; different basic types
D:\A.C(112) : error C2371: 'find' : redefinition; different basic types
D:\A.C(117) : error C2371: 'delet' : redefinition; different basic types
D:\A.C(118) : error C2371: 'order' : redefinition; different basic types
D:\A.C(119) : error C2371: 'load' : redefinition; different basic types
D:\A.C(127) : error C2371: 'print' : redefinition; different basic types
D:\A.C(230) : error C2371: 'create' : redefinition; different basic types
D:\A.C(232) : error C2065: 'x' : undeclared identifier
D:\A.C(232) : error C2223: left of '->position' must point to struct/union
D:\A.C(233) : error C2223: left of '->num' must point to struct/union
D:\A.C(234) : error C2223: left of '->name' must point to struct/union
D:\A.C(235) : error C2223: left of '->sex' must point to struct/union
D:\A.C(236) : error C2223: left of '->chinese' must point to struct/union
D:\A.C(237) : error C2223: left of '->math' must point to struct/union
D:\A.C(238) : error C2223: left of '->english' must point to struct/union
D:\A.C(239) : error C2223: left of '->ave' must point to struct/union
D:\A.C(297) : error C2371: 'find' : redefinition; different basic types
D:\A.C(375) : error C2371: 'avesubject' : redefinition; different basic types
D:\A.C(418) : error C2371: 'lookdata' : redefinition; different basic types
D:\A.C(428) : error C2065: 'p' : undeclared identifier
D:\A.C(428) : warning C4047: '!=' : 'int ' differs in levels of indirection from 'void *'
D:\A.C(430) : warning C4022: 'fwrite' : pointer mismatch for actual parameter 1
D:\A.C(431) : error C2223: left of '->next' must point to struct/union
D:\A.C(436) : error C2371: 'print' : redefinition; different basic types
D:\A.C(450) : error C2371: 'delet' : redefinition; different basic types
D:\A.C(495) : error C2371: 'load' : redefinition; different basic types
D:\A.C(536) : warning C4244: '=' : conversion from 'int ' to 'float ', possible loss of data
D:\A.C(536) : warning C4244: '=' : conversion from 'float ' to 'int ', possible loss of data
D:\A.C(537) : warning C4244: '=' : conversion from 'int ' to 'float ', possible loss of data
D:\A.C(537) : warning C4244: '=' : conversion from 'float ' to 'int ', possible loss of data
D:\A.C(538) : warning C4244: '=' : conversion from 'int ' to 'float ', possible loss of data
D:\A.C(538) : warning C4244: '=' : conversion from 'float ' to 'int ', possible loss of data
D:\A.C(625) : error C2371: 'order' : redefinition; different basic types
D:\A.C(652) : error C2040: 'password' : 'char []' differs in levels of indirection from 'int '
Error executing cl.exe.
A.exe - 28 error(s), 21 warning(s)Vincent8 发布留言 2008-10-21 10:52 不错啊
页: [1]
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