#include<stdio.h>
#include<malloc.h>
#define NULL 0
#define LENG sizeof(struct student)
#define LEN sizeof(struct subject)
struct student /*先定义一个学生信息的结构体数组*/
{char num[11];
char name[18];
char sex[2];
float score[12];
struct student *next;
};
struct subject
{char subj[20];
int xf[20];
struct subject *next;};int t,m,n;char filename[15],name[15];
float all; /*这是为了解决输入中不可以输入浮点型数据面设立的一个浮点型全局变量*/
struct student *creat(void) /*输入学生信息函数*/
{struct student *head;int i,j;
struct student *p1,*p2; /*学生的信息有指针来存放比较好*/
t=0;
p1=p2=(struct student *)malloc(LENG);
printf("******************************************************\n");
printf("请输入学号：\n");
printf(" ");
scanf("%s",p1->num);getchar();
printf("******************************************************\n");
printf("请输入姓名：\n");
printf(" ");
scanf("%s",p1->name);
printf("******************************************************\n");
printf("请输入性别：\n");
printf(" ");
scanf("%s",p1->sex);
printf("******************************************************\n");
printf("\t各科成绩为:\n\n");
for(i=0;i<m;i++)
{ printf("第%d门成绩：",i+1);
scanf("%f",&all);
(p1->score[i])=all;
printf("******************************************************\n");}
head=NULL;
while(p1->num!="0")
{t=t+1;
if(t==1) head=p1;
else p2->next=p1;
p2=p1;
p1=(struct student *)malloc(LENG);
printf("\n\n");
printf("******************************************************\n");
printf("请输入学号：\n");
printf(" ");
scanf("%s",&p1->num); getchar();
if(strcmp(p1->num,"0")==0)break;
printf("******************************************************\n");
printf("请输入姓名：\n");
printf(" ");
scanf("%s",&p1->name);
printf("******************************************************\n");
printf("请输入性别：\n");
printf(" ");
scanf("%s",p1->sex);
printf("******************************************************\n");
printf("\t各科成绩为:\n\n");
for(i=0;i<m;i++)
{ printf("第%d门成绩：",i+1);
scanf("%f",&all);
(p1->score[i])=all;
printf("******************************************************\n");}
}
printf("\n\n");
p2->next=NULL;
return(head);
}
void print1(struct student *head) /*这是打印学生的信息的一个函数*/
{struct student *p; int i;
p=head;
if(head!=NULL)
do
{ printf("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n");
printf("学号：");
printf("\t%s\n",p->num);
printf("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n");
printf("姓名：");
printf("\t%s\n",p->name);
printf("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n");
printf("性别：");
printf("\t%s\n",p->sex);
printf("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n");
for(i=0;i<m;i++)
{ printf("该学生第%d门课原始分为：",i+1);
printf("%f\n",p->score[i]);
}
printf("\n\n");
p=p->next;
}while(p!=NULL);
}
struct student *dele(struct student *head,char num[11]) /*这个是删除学生信息的一个函数*/
{struct student *p1,*p2;
if(head==NULL)
{printf("\n 找不到资料：\n");return(head);}
p1=head;
while ((strcmp(num,p1->num)!=0)&&p1->next!=NULL)
{p2=p1;p1=p1->next;
if(strcmp(p1->num,num)==0)
{if(p1==head)head=p1->next;
else p2->next=p1->next;
printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
printf("你想删除的学号是：%s",num);
t=t-1; }
else printf("错误！\n"); }
return(head);
}
struct student *add(struct student *head,struct student *stu)/*这个是添加学生信息的一个函数*/
{struct student *p0,*p1,*p2;
p1=head;
p0=stu;
if(head==NULL)
{head=p0;p0->next=NULL;}
else
{while ((strcmp(p0->num,p1->num)!=0)&&(p1->next!=NULL))
{p2=p1;
p1=p1->next;}
if(strcmp(p0->num,p1->num)>0)
{if(head==p1)head=p0;
else p2->next=p0;
p0->next=p1;}
else
{p1->next=p0;p0->next=NULL;}
}
t=t+1;
return(head);
}
struct student *change(struct student *head,char num[]) /*这个是修改学生信息的函数*/
{struct student *p1,*p2;int i;char ch;float sc[25];
if(head==NULL){printf("\n list null!\n");return(head);}
p1=head;
if(strcmp(num,p1->num)==0) /*一面是定义修改的是学生哪方面的信息*/
{printf("输入1--修改学号，输入2--修改姓名，输入3--修改性别，输入4--修改成绩，请输入:");
scanf("%d",&ch);
printf("请输入修改内容:");
if(ch==1){scanf("%s",p1->num);}
else if(ch==2){scanf("%s",p1->name);}
else if(ch==3)scanf("%s",p1->sex);
else if(ch==4){for(i=0;i<m;i++)
{scanf("%d",&p1->score[i]);printf("\n");}
} }
else{
while((strcmp(num,p1->num)!=0)&&p1->next!=NULL)
{p2=p1;p1=p1->next;p1=p2->next;
if(strcmp(num,p1->num)==0)
{printf("输入1--修改学号，输入2--修改姓名，输入3--修改性别，输入4--修改成绩，请输入:");
scanf("%d",&ch);
printf("请输入修改内容:");
if(ch==1){scanf("%s",p1->num);}
else if(ch==2){scanf("%s",p1->name);}
else if(ch==3)scanf("%s",p1->sex);
else if(ch==4){for(i=0;i<m;i++)
{scanf("%d",&p1->score[i]);printf("\n");}
} }
else
printf("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
printf("输入错误!!!该学号不存在!：\n");
} }
return(head);
}
void print2(struct student *head,struct subject *head1,char number[12])
{struct student *p;int i,j=1;float h=0,JD[15],XCP,ZXJH=0,ZX=0; struct subject *q2;
q2=head1;
for(i=0;i<m;i++)
{ZX=ZX+q2->xf[i];}
for(i=0;i<m;i++)
{ZXJH=ZXJH+(q2->xf[i]*5);}
p=head;
if(head!=NULL)
{for(i=0;i<n;i++)
{ if (strcmp(number,p->num)==0)
{
for(j=0;j<m;j++)
{
printf(" 第%d门课原始分、绩点：",j+1);
printf("%d ",p->score[j] );
if(p->score[j]>=60)
{ JD[j]=p->score[j]/10-5;
printf("(%f)",JD[j]); }
else { JD[j]=0;printf("%f",JD[j]); }
h=((q2->xf[j])*JD[j])+h; }
printf("平均学分绩点为:");
printf("%f",h/ZX);
printf(" 学业成绩平均分为: ");
printf("%f",((h/ZX)/ZXJH)*100); h=0; }
else p=p->next; } } }
struct subject *creat1(void)
{struct subject *head;int r,i,j=1;
struct subject *p1;
p1=(struct subject *)malloc(LEN);
for(i=0;i<m;i++)
{
printf("输入第%d门课学号分：",j);
scanf("%d",p1->xf[i]);
j=j+1;
}
head=NULL;
head=p1;
free(p1);
return(head);
}
void print3(struct subject *head)
{struct subject *p;
printf("\n 各科目名字和学分分别是：\n");
p=head;
if(head!=NULL)
do
{printf("%s%d",p->subj,p->xf);
p=p->next;
}while(p!=NULL);
}
void menu()
{
char a; struct student *head,*head1; char dele_num[15],chan_num[15],finenum[12];
struct subject *head2; int i; /*以下是目录*/
printf(" 功能选择提示 \n");
printf(" ********************************************************\n");
printf(" ********* 按 1 输入学生基本信息 *********\n");
printf(" ********* 按 0 结束信息输入 *********\n");
printf(" ********* 按 2 输出学生信息 *********\n");
printf(" ********* 按 3 删除学生信息 *********\n");
printf(" ********* 按 4 增加学生信息 *********\n");
printf(" ********* 按 5 修改学生信息 *********\n");
printf(" ********* 按 6 输出计算信息 *********\n");
printf(" ********* 按其他键返回 *********\n");
printf(" ********************************************************\n");
printf("请选择:");
scanf("%d",&a);
{ if(a==1){head=creat(); print1(head); menu();}
else if(a==2){print1(head); menu();}
else if(a==3){printf("请输入删除学号:\n");
printf(" ");
scanf("%s",dele_num);getchar();
dele(head,dele_num);
menu();}
else if(a==4){head1=(struct student *)malloc(LENG);
printf("输入学号：\n");
printf(" ");
scanf("%s",head1->num);
printf("输入姓名：\n");
printf(" ");
scanf("%s",head1->name);
printf("输入性别：\n");
printf(" ");
scanf("%s",head1->sex);
printf("输入各科成绩:\n");
printf(" ");
for(i=0;i<m;i++)
{scanf("%f",&all);
(head1->score[i])=all;}
head=add(head,head1);
print1(head);
menu();}
else if(a==5){printf("请输入要修改的学号:");
scanf("%s",chan_num); getchar();
change(head,chan_num);
menu(); }
else if(a==6) {head2=creat1();
printf("请输入查询学业情况的学生学号：");
scanf("%s",finenum);
print2(head,head2,finenum);menu();}
} }
void main()
{ void menu();
printf("全班同学的人数为：");
printf(" ");
scanf("%d",&n);
printf("\n");
printf("功课的门数为:");
printf(" ");
scanf("%d",&m);
printf("\n\n");
menu();}
请运行它,这个程序在输入信息时,如果把学生信息输入完了, 要按 0 才能退出并进行其他
功能, 我不知道怎么样才能加些语句上去使得当你输入完信息后, 它能自动跳出来使你可以
直接操作下一步, 请各位指点一下~~~~
就是说, 比如你输入学生人数为3 时, 当你输入完3个学生的信息后, 它还继续显示让你输入下一位学生的信息, 你要进行其他操作只能按0键, 怎么才能使它不这样子呢?
