student_add_manage.c

c程序设计课程设计之学生通讯录管理

                                       

#include <stdio.h>
#include <stdio.h>
#include <string.h>
#define maxlen 100
struct persons
{ char name[10];
 char addr[20];
 char phnum[10];
 }persons[maxlen];
;
;
;
typedef struct lnode{
 char name[10];
 char addr[20];
char phnum[10];
 struct lnode *next;
 }listnode,*linklist;
;
;
;
 linklist head=NULL,r=NULL;
 listnode *s,*p0,*p1,*p2,*p3,*p4,*p5,*p6,*p7;
 int i;
 char name1[10],ch;
 char str1[20];
 FILE *fp; ;
void creat()
{ int j;
 long k;
 fp=fopen("people.txt","r+t");
 if(fp!=NULL)
 {for(i=1;i<maxlen;i++)
{ j=fgetc(fp);
 if(j==EOF)
 return;
 k=i-1;
 fseek(fp,k*sizeof(struct persons),0);
 fread(&persons[i],sizeof(struct persons),1,fp);
 s=(linklist)malloc(sizeof(listnode));
 strcpy(s->name,persons[i].name);
 strcpy(s->addr,persons[i].addr);
 strcpy(s->phnum,persons[i].phnum);
 if(head==NULL)
 head=s;
 else
 r->next=s;
 r=s;}
}
 else
 { fp=fopen("people.txt","w"); i=1;
 }
}
;
;
;
void List()
{ p1=head;
while(p1!=NULL)
 { printf("\n\n\tname:%s\n",p1->name);
 printf("\n\n\taddr:%s",p1->addr);
 printf("\n\n\tphnum:%s",p1->phnum);
 p1=p1->next;
 }
 }
;
;
;
void Delete()
{ printf("\n\n\tplease input the name:");
 gets(name1); p4=head;
 if(strcmp(p4->name,name1)==0)
 { p4=p4->next;
 head=p4;
 }
 else
 { while(strcmp(p4->next->name,name1)!=0)
 p4=p4->next;
 p5=p4->next;
 p4->next=p5->next;
 free(p5);
 }
 }
;
;
;
void Find()
{ printf("\n\n\tplease input the name:");
 p0=head;
 gets(name1);
 while(strcmp(name1,p0->name)!=0&&p0!=NULL)
 p0=p0->next;
 if(p0==NULL)
 printf("\n\n\tIt is not exit in the addr-book!");
 else
 { printf("\n\n\tname:%s\n",p0->name);
 printf("\n\n\taddr:%s",p0->addr);
 printf("\n\n\tphnum:%s",p0->phnum);
 }
}
;
;
;
void Input()
{ s=(linklist)malloc(sizeof(listnode));
 printf("\n\n\tplease input the sb's meg:");
 printf("\n\n\t\tname:");
 scanf("%s",s->name);
 printf("\n\n\t\tAddr:");
 scanf("%s",s->addr);
 printf("\n\n\t\tphnum:");
 scanf("%s",s->phnum);
 if(head==NULL)
 head=s;
 else
 r->next=s;
 r=s;
}
;
;
;
void Alter()
 {
 int j;
 printf("\n\n\tPlease input the name:");
 gets(name1);
 p3=head;
 while(strcmp(name1,p3->name)!=0&&p3!=NULL)
 p3=p3->next;
 if(p3==NULL)
 printf("\n\n\tIt is not exit in the addr-book!");
 else
 { printf("\n\n\tplease input the new meg!");
 printf("\n\n\t\tname:");
 scanf("%s",name1);
 strcpy(p3->name,name1);
 printf("\n\n\t\tAddr:");
 scanf("%s",name1);
 strcpy(p3->addr,name1);
 printf("\n\n\t\tphnum:");
 scanf("%s",name1);
 strcpy(p3->phnum,name1);
 }
}
;
;
;
void Save()
{ int j;
 fp=fopen("people.txt","w");
 for(p2=head,j=0;p2!=NULL;j++,p2=p2->next)
 { strcpy(persons[j].name,p2->name);
 strcpy(persons[j].addr,p2->addr);
 strcpy(persons[j].phnum,p2->phnum);
 fwrite(&persons[j],sizeof(struct persons),1,fp);
 }
}
;
;
;

void main()
{ creat();
 do
 {printf("\n\t***********************************************\n");
 printf("\n\n\tWELCOME TO USE XIESHENGQING's Address book\n");
 printf("\n\t**********************************************\n");
 printf("\n\n\t\tPlease make a choice below:");
 printf("\n\t\t1.List all the meg");
 printf("\n\t\t2.Delete a piece of meg");
 printf("\n\t\t3.Find a piece of meg");
 printf("\n\t\t4.Add a piece of meg");
 printf("\n\t\t5.Alter a piece of meg");
 printf("\n\t\t6.Save and Quit");
 printf("\n\t\t7.Create an address book");
 printf("\n\n\n");
 printf("\tInput Your Choice:");
 ch=getche();
 switch(ch)
 { case '1': List(); break;
 case '2': Delete();
 break;
 case '3': Find();
 break;
 case '4': Input();
 break;
 case '5': Alter();
 break;
 case '7': Save();
break;
 case '6': creat();
 fclose(fp);
exit(0);
 break;
 default:
 printf("\n\t********************************************\n");
 printf("\n\t The num should 1-4!!! \n");
 printf("\n\t********************************************\n");
 break;
 }
 }while(1);
 }