mailmanagementsystem.c

我做的一个MAIL MANAGEMENT SYSTEM

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h> 
#define LEN sizeof(struct addbook)
#define MAX 100
void  InitDialBook(void);
void  UserInterface(void);/*The Menu Function*/
void  Load(void);
void  Add(void);
void  Find(void);
void  Modify(void);
void  Delete(void);
void  ShowAll(void);
void  Save(void);
void  Quit(void);
struct addbook{
  int   record;
  char  name[15];

  char  age[4];
  char  addr[20];
  char  phone[15];
  /*Personal Signature*/
struct addbook  *link;
};
FILE  *fp;
struct addbook  *p,*p1,*head,*s,*t;
main () /*(int argc, char * argv[])*/
{
  /*FILE *fp;
  int err=0;
  
  if (DEBUG)
  printf("\nNum of arguments = %d\n",argc);
  if (argc==2)
  {
              err=init_file(&fp,argv[1]);
              if (DEGUG)
                printf("\nOpen file returned %d\n",err);*/
                
  int  flag;
  int  choice;
  if((fp = fopen("zzxx.txt","rb"))==NULL)
  {   system("cls");
 printf("\n\n\t\t\tThe file is not exist!\n");
        if((fp = fopen("zzxx.txt","wb"))==NULL)
        {
          printf("Error on opening files!\n");
          getchar();
          exit(0);
        }
    }
    if(fgetc(fp)==-1)
    {
 printf("\n\t\tNo information in the system file, please add the information.\n");
        InitDialBook();
 printf("\n\t\t\tadding was successful!\n");
 printf("\n\t\tIf you want to add more information, please restart this program.\n");
        getchar();

    }
    rewind(fp); /* Initail file pointer */
    Load();
    fclose(fp);
   /* printf("\nthis is the%dmail.\n",p->record); */
    flag = 1;
    while(flag)
    {
      UserInterface();
 printf("Please enter your choice:(1-6):");
        scanf("%d",&choice);
 getchar();
 if(choice>=0&&choice<6)
 {
   switch(choice)
    {
      case 1:
         Add();break;
      case 2:
         Find();break;
      case 3:
         ShowAll();break;
      case 4:
         Delete();break;
      case 5:
         Modify();break;
      case 6:
         Quit();break;
      flag = 0;
      system("cls");
      printf("\n\n\n\t\t\tThank you for using my programe!!!");
      printf("\n\n\t\tIf you have any advice, please contact:");
      printf("\n\n\t\t\[e-mail] or 021892984");
      getchar();
      break;
            }
        }
        else{
            printf("Wrong type of input,please enter again!\n");
        }
    }
    fp = fopen("zzxx.txt","wb");
    Save();
    fclose(fp);   system("cls");
    printf("\n\n\n\t\t\tPress any key to quit!\n");
    getchar();
    return 0;
}
void    InitDialBook(void)/*Starting file function*/
{
    p->record = 1;
    printf("\n\n\t\tPlease enter Name:");
    gets(p->name);

    printf("\n\t\tPlease enter Address:");
    gets(p->addr);
    printf("\n\t\tPlease enter Phone number:");
    gets(p->phone);

    p->link = NULL;
    head = p;
    fwrite(p,LEN,1,fp);
    fclose(fp);
}
void  UserInterface(void)/*Menu*/
{   system("cls");
    printf("\n\t\t*************************************************\n");
    printf("\t\tWellcome to Wang Lei's mail management system");
    printf("\n\t\t*************************************************\n");
    printf("\n\n\t\t\t******Please choose your opinion******\n");
    printf("\t\t\t  +-------------------------------+");
    printf("\t\t\t\t\t\t  | 1  Add record                 |\n");
    puts(" \t\t\t  | 2  Find record                |");
    printf("\t\t\t  | 3  Display all records        |\n");
    printf("\t\t\t  | 4  Delete record              |\n");
    printf("\t\t\t  | 5  Modify record              |\n");
    puts(" \t\t\t  | 6  Exit                       |");
    printf("\t\t\t  +-------------------------------+\n");
    printf("\n\n\tPlease Notice!!The address and name enter must bu in English!!\n\n");
}
void  Load(void)/*Reading from file*/
{
    fread(head,LEN,1,fp);
    p = head;
    while(p->link!=NULL){
        p1 = (struct addbook*)malloc(LEN);
        p1 = p->link;
        fread(p1,LEN,1,fp);
        p = p->link;
    }
}
void    Add(void)/*input function*/
{
    p1 = (struct addbook*)malloc(LEN);
    p1->record = p->record + 1;  system("cls");
    printf("\n\n\t\t\t-------------------------------------------\n");
    printf("\t\t\t\t\tPlease Enter Information\n");
    printf("\t\t\t-------------------------------------------\n");
    printf("\n\t\t\tThis is the %d mail information",p->record+1);
    printf("\n\t\t\tPlease Enter Name:");
    gets(p1->name);

    printf("\n\t\t\tPlease Enter Address:");
    gets(p1->addr);
    printf("\n\t\t\tPlease Enter Phone Number:");
    gets(p1->phone);

    p1->link = NULL;
    p->link = p1;
    p = p1;
}
 void    ShowAll(void)/*Show all the functions*/
{
    s = head;
 system("cls");
 printf("\n\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
 printf(" \tNO.  NAME  ADDRESS   PHONE");
 printf("\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    do{
 printf("\t  %-6d%-10s%-8s%-7s%-10s%-10s%-s%-s\n",s->record,s->name,s->addr,s->phone);
        s = s->link;
    }while(s!=NULL);
    printf("\n\n\n\t\t\tPress any KEY to QUIT");
    getchar();
    return;
}
void    Find(void)/*Find function*/
{
    char    c;
    struct addbook    who;
    s = head;
    system("cls");
    printf("\n\t\tPlease enter the name you want to find:");
    gets(who.name);
    while((s->link!=NULL)&&(strcmp(s->name,who.name)))
    {
        s = s->link;
    }
    if((s->link==NULL)&&(strcmp(s->name,who.name)))
    {
        printf("\"%s\" Not exist!\n",who.name);
        printf("Please check the name and search again\n");
        getchar();
        return;
    }
    system("cls");
    puts(" The following is the information of the record");
    printf("\n******************************************************\n");
    printf("\t NO.  NAME  ADDRESS  PHONE ");
    printf("\n******************************************************\n");
    printf("\t %-6d%-10s%-8s%-7s%-8s%-10s%-s%-s\n",s->record,s->name,s->addr,s->phone);
    puts(" delete modify or quit");
    printf("\n\tPlease enter your choice(d/m/q):");
    scanf("%c",&c);
    switch(c)
    {
        case 'D':
        case 'd':Delete();break;
        case 'M':
        case 'm':Modify();break;
    }
}
void  Modify(void)
   { getchar();
    printf("\n\t\tPlease enter New Name:");
    gets(s->name);

    printf("\n\t\tPlease enter New Address:");
    gets(s->addr);
    printf("\n\t\tPlease enter New Phone number:");
    gets(s->phone);

    printf("\n\t\tModify was successful!\n");
    getchar();
   }
void    Delete(void)/*Delete function*/
{
    int    find_prev;
    int    find_record;
    char    del;
    char    del_member_name[15];
    struct addbook    *p_del_prev;
    strcpy(del_member_name,s->name);
    getchar();
    printf("Are you SURE you want to delete %s(Y/N)?",del_member_name);
    scanf("%c",&del);
    if(del=='n'||del=='N')
    {
        return;
    }
    find_prev = s->record - 1;
    find_record = 1;
    p_del_prev = head;
    while((p_del_prev->link!=NULL)&&(find_record<find_prev))
    {
        p_del_prev = p_del_prev->link;
        find_record++;
    }
    /* If delete the first mail information*/
    if(s->record==1)
    {
        if(s->link!=NULL)
        {
            head = head->link;
            s = head;
            while(s!=NULL)
            {
                s->record = s->record - 1;
                s = s->link;
            }
            printf("%d,%s",p->record,p->name);
        }
        else if(s->link==NULL){  /* If only one mail information in the file */
            p  = NULL;
            head = p;
            if(remove("zzxx.txt")==0){
                printf("You already deteled last information, file is now empty!\n");
                printf("So, you must rebuild information file\n");
                printf("Please open the programe again.\n");
            }
     printf("\n\n\t\tPress any key to quit.\n");
            getchar();
            exit(0);
        }
    }
    /* If delete the last information */
    else if(s->record==p->record){
        p_del_prev->link = NULL;
        s->link = NULL;
        p  = p_del_prev;
    }
    else{
        p_del_prev->link = s->link;
        s->link = NULL;
        while(p_del_prev->link!=NULL)
        {
            p_del_prev = p_del_prev->link;
            p_del_prev->record = p_del_prev->record -1;
        }
        printf("%d\n%d\n",p->record,p->link);
    }
    printf("Mail Information\"%s\" has been deleted.\n ",del_member_name);
    getchar();
}
void    Save(void)/*Save file*/
{
    s = head;
    do{
        fwrite(s,LEN,1,fp);
        s = s->link;
    }while(s!=NULL);
}

void    Quit(void)
{

       exit(0);
       printf("************End of Mail manage system*****\n");

printf("\t\t\t\t\t\tPress any key to exit...");
fflush(stdin);
getch();


      }