Final training simple address book c language

#include "stdio.h"
#include "stdlib.h"
#include <string.h>


struct address
{
    
	char city[10];
	char street[20];
};
struct linklist 
{
    
	char name[10];
	char phone[15];
	struct address add;
	char zip[7];
	char email[20];
	struct linklist *next;
};

struct linklist *create();// Create a linked list  8 
void writelisttofile(FILE *fp, struct linklist *head);// Write the linked list to the file  7 
void showmenu();// The main menu 1 
void listshow(struct linklist *head);//  Show one , No files  , Changed  5 







void listdelete(struct linklist *head);// Delete  9 
struct linklist * listdeletebyname(struct linklist *head);// Delete by name  10 
void showdeletemenu();//2 

void showsearchmenu();// Find the menu  3 
void listsearch(struct linklist *head);// lookup  11 
struct linklist * listsearchbyname(struct linklist *head, char []);// Look up by name  12 
void itemlistshow(struct linklist *ptr);// Find out if there are contacts and output  13 

void showemodifiermenu();// Modify the menu 4 
struct linklist *listmodifierbyname(struct linklist *head);//15 
void modifier(struct linklist *head);//14 

struct linklist  *paixu(struct linklist *head);//16 

struct linklist *listadd(struct linklist *);// add to  6 
struct linklist *head;
int main()
{
    
	int choice;
	head=create(); 
	
	while(1)
	{
    
		showmenu();
		scanf("%d",&choice);
		switch(choice)
		{
    
			case 1: listshow(head);
				break;
			case 2: listadd(head);
				break;
			case 3: listdelete(head);
				break;
			case 4: modifier(head);
				break;
			case 5: listsearch(head);
				break;
			case 6: system("cls"); 
				break;
			default:paixu(head);
			         listshow(head);
				printf(" Input error , Please re-enter ！\n") ;
			 exit(0);
		}
	}
	return 0;
}


// The main menu  
void showmenu()
{
    

	printf("**********************************\n");
	printf("1.  Show \n");
	printf("2.  add to \n");
	printf("3.  Delete \n");
	printf("4.  modify \n");
	printf("5.  Inquire about \n");
	printf("6.  clear   screen \n");
	printf("7.  Exit the system \n");
	printf("**********************************\n");
	printf(" Please enter your options ：\n");

}


// Create a linked list   success  
struct linklist * create()
{
    
	struct linklist *head, *ptr1,*ptr2;
	int i,n,flag=0;
	char name[10],phone[15],city[10],street[20],zip[7],email[20];
	FILE *fp;
	fp = fopen("lianxiren.txt","r");
	if (fp == NULL)
	{
    
		printf(" Please enter the number of contacts ：\n");
		scanf("%d",&n);
		if (n == 0)
		{
    
			head = NULL;
			return head;
		}
		else
		{
    
			printf(" Please enter %d Contact information ：\n",n);
			for(i=1;i<=n;i++)
			{
      
			    printf(" Please enter the name of the contact person ：");
			    scanf("%s",name); 
			    printf(" Please enter the contact's phone number ：");
			    scanf("%s",phone);
				printf(" Please enter the contact's city ：");
				scanf("%s",city);
				printf(" Please enter the street of the contact ：");
				scanf("%s",street);
				printf(" Please enter the postal code of the contact ：");
				scanf("%s",zip);
				printf(" Please enter the email of the contact ：");
				scanf("%s",email);
				
				if (!flag)
				{
    
					head = ptr2 = ptr1 = (struct linklist *)malloc(sizeof(struct linklist));
					flag = 1;
				}
				else
					ptr1 = (struct linklist *)malloc(sizeof(struct linklist));
				strcpy(ptr1->name,name);
				strcpy(ptr1->phone,phone);
				strcpy(ptr1->add.city,city);
				strcpy(ptr1->add.street,street);
				strcpy(ptr1->zip,zip);
				strcpy(ptr1->email,email);
				
				ptr2 ->next = ptr1;
				ptr2 = ptr1;
			}
			ptr1->next=NULL;
		}
	}
	else
	{
    
		head = NULL;
		while(!feof(fp))
		{
    
			if(!flag)
			{
    
				head = ptr2 = ptr1 = (struct linklist *)malloc(sizeof(struct linklist));
				flag = 1;
			}
			else
				ptr1 = (struct linklist *)malloc(sizeof(struct linklist));
			fscanf(fp,"%s %s %s %s %s %s",ptr1->name,ptr1->phone,ptr1->add.city,ptr1->add.street,ptr1->zip,ptr1->email);
			ptr2 ->next = ptr1;
			ptr2 = ptr1;
		}
		ptr1->next = NULL;
		fclose(fp);
	}
	if ((fp = fopen("lianxiren.txt","w")) == NULL)
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);
	return head;
}



// Write the linked list into the function  
void writelisttofile(FILE *fp, struct linklist *head)
{
    
	struct linklist *ptr;
	ptr = head;
	while(ptr)
	{
    
		if (ptr->next!=NULL)
		{
    
			fprintf(fp,"%s %s %s %s %s %s\n",ptr->name,ptr->phone,ptr->add.city,ptr->add.street,ptr->zip,ptr->email);
		}
		else
			fprintf(fp,"%s %s %s %s %s %s",ptr->name,ptr->phone,ptr->add.city,ptr->add.street,ptr->zip,ptr->email);
	
		ptr = ptr->next;
	}
}



// Show  
void listshow(struct linklist *head)
{
    
	struct linklist *temp;
	FILE *fp;
	 
	temp = head;
	while(temp)
	{
    
		printf("%s %s %s %s %s %s\n",temp->name,temp->phone,temp->add.city,temp->add.street,temp->zip,temp->email);
		temp = temp->next;
	}
	if ((fp = fopen("lianxiren.txt","w")) == NULL)// Here is what I added  
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);

}




// add to  
struct linklist *listadd(struct linklist *head)
{
    
	FILE *fp;
	char name[10],phone[15],city[10],street[20],zip[7],email[20];
	struct linklist *ptr;
	ptr = head;
	while(ptr->next)
	{
    
		ptr = ptr->next;
	}
	printf(" Please enter the information of the contact you want to add ：\n");
                printf(" Please enter the name of the contact person ：");
			    scanf("%s",name); 
			    printf(" Please enter the contact's phone number ：");
			    scanf("%s",phone);
				printf(" Please enter the contact's city ：");
				scanf("%s",city);
				printf(" Please enter the street of the contact ：");
				scanf("%s",street);
				printf(" Please enter the postal code of the contact ：");
				scanf("%s",zip);
				printf(" Please enter the email of the contact ：");
				scanf("%s",email);
				
		ptr->next = (struct linklist *)malloc(sizeof(struct linklist));
		ptr = ptr->next;
	            strcpy(ptr->name,name);
				strcpy(ptr->phone,phone);
				strcpy(ptr->add.city,city);
				strcpy(ptr->add.street,street);
				strcpy(ptr->zip,zip);
				strcpy(ptr->email,email);
		
	
	ptr->next = NULL;

	if ((fp = fopen("lianxiren.txt","w")) == NULL)
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);
	return head;
}




// Delete menu  
void showdeletemenu()
{
    
	printf("*************** Delete   except ***************\n");
	printf("1.  Delete by name \n");
	printf("2.  Go back to the previous level \n");
	printf("3.  Exit the system \n");
	printf("**********************************\n");
}


 
 
 
 // Delete  
void listdelete(struct linklist *head)
{
    
	int choice;
	while(1)
	{
    
		showdeletemenu();
		scanf("%d",&choice);
		switch(choice)
		{
    
			
			case 1: 
				head = listdeletebyname(head);
				break;
			case 2: break;
			default: paixu(head);
			         listshow(head);
			exit(0);
		}
		if (choice == 2) 
			break;
		
		
		
	}
}



// Delete the name  
struct linklist * listdeletebyname(struct linklist *head)
{
    
	FILE *fp;
	char name[10];
	struct linklist *temp,*ptr,*ptr1;
	printf(" Please enter the name to delete ：\n");
	scanf("%s",name);
	temp = listsearchbyname(head,name);
	itemlistshow(temp);
	if (temp == NULL)
	{
    
		head=head;
	} 
	else
	{
    
		if (temp == head)
		{
    
			head = head->next;
			free(temp);
		} 
		else
		{
    
			ptr = head;
			ptr1 = head->next;
			while(ptr1!=temp)
			{
    
				ptr=ptr->next;
				ptr1 = ptr1->next;
			}
			ptr->next = ptr1->next;
			free(temp);
		}
		head=head;
	}
	if ((fp = fopen("lianxiren.txt","w")) == NULL)
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);
	return head;
}











// lookup , Whether to find the contact and output  
void itemlistshow(struct linklist *ptr)
{
    
	if (ptr == NULL)
	{
    
		printf(" Can't find ！\n");
	} 
	else
	{
    
		printf("%s %s %s %s %s %s\n",ptr->name,ptr->phone,ptr->add.city,ptr->add.street,ptr->zip,ptr->email);
	}
}

void showmodifiermenu()
{
    
	printf("*************** repair   Change ***************\n");
	printf("1.  Modify by name \n");
	printf("2.  Go back to the previous level \n");
	printf("3.  Exit the system \n");
	printf("**********************************\n");
}
// modify  
void modifier(struct linklist *head)
{
    
	int choice;
	while(1)
	{
    
		showmodifiermenu();
		scanf("%d",&choice);
		switch(choice)
		{
    
			case 1: 
				head = listmodifierbyname(head);
				break;
			case 2: break;
			default: paixu(head);
			         listshow(head);
			    exit(0);
		}
		if(choice==2)
			break;
	}
}
// Modify by name  
struct linklist * listmodifierbyname(struct linklist *head)
{
    
	FILE *fp;
	char name[10],phone[15],city[10],street[20],zip[7],email[20];
	struct linklist *temp;
	printf(" Please enter the contact name to modify ：\n");
	scanf("%s",name);
	temp= listsearchbyname(head,name);
	itemlistshow(temp);
	if(temp!=NULL)
	{
    
		printf(" Please enter all the information of this contact after modification :\n");
	    scanf("%s%s%s%s%s%s",name,phone,city,street,zip,email);
	    strcpy(temp->name,name);
		strcpy(temp->phone,phone);
		strcpy(temp->add.city,city);
		strcpy(temp->add.street,street);
		strcpy(temp->zip,zip);
		strcpy(temp->email,email);
	}
	if ((fp = fopen("lianxiren.txt","w")) == NULL)
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);
	return head;
}



// Find the menu  
void showsearchmenu()
{
    
	printf("*************** check   look for ***************\n");
	printf("1.  Search by name \n");
	printf("2.  Go back to the previous level \n");
	printf("3.  Exit the system \n");
	printf("**********************************\n");
}

// lookup  
void listsearch(struct linklist *head)
{
    
	int choice;
	
	char name[10];
	struct linklist *temp;
	while(1)
	{
    
		showsearchmenu();
		scanf("%d",&choice);
		switch(choice)
		{
    
			
			case 1: printf(" Please enter the contact to query ：\n");
				scanf("%s",name);
				temp = listsearchbyname(head,name);
				itemlistshow(temp);
				break;
			case 2: break;
			default: paixu(head);
			         listshow(head);
			exit(0);
		}
		if (choice == 2)
		{
    
			break;
		}
	}
}



// Look up by name  
struct linklist * listsearchbyname(struct linklist *head,char name[])
{
    
	struct linklist *ptr;
	ptr = head;
	while(ptr)
	{
    
		if (strcmp(ptr->name,name) == 0)
		{
    
			break;
		}
		ptr = ptr->next;
	}
	return ptr;
} 

struct linklist  *paixu(struct linklist *head)
{
    
	FILE *fp;
	struct linklist *ptr,*ptr1;
	int i,j,listlength=0;
	char temp[100];
	ptr = head;
	while(ptr)
	{
    
		listlength++;
		ptr=ptr->next;
	}
	ptr = head;
	for(i=1;i<listlength;i++)
	{
    	ptr = head;
		for(j=1;j<=listlength-i;j++,ptr=ptr->next)
		{
    
			ptr1 = ptr->next;
			if(strcmp(ptr->name,ptr1->name)>=0)
			{
    
	            strcpy(temp,ptr->name);
	            strcpy(ptr->name,ptr1->name);
	            strcpy(ptr1->name,temp);
				strcpy(temp,ptr1->phone);
	            strcpy(ptr->phone,ptr1->phone);
	            strcpy(ptr1->phone,temp);
	            strcpy(temp,ptr->add.city);
	            strcpy(ptr->add.city,ptr1->add.city);
	            strcpy(ptr1->add.city,temp);
	            strcpy(temp,ptr->add.street);
	            strcpy(ptr->add.street,ptr1->add.street);
	            strcpy(ptr1->add.street,temp);
	            strcpy(temp,ptr->zip);
	            strcpy(ptr->zip,ptr1->zip);
	            strcpy(ptr1->zip,temp);
	            strcpy(temp,ptr->email);
	            strcpy(ptr->email,ptr1->email);
	            strcpy(ptr1->email,temp);
			}
		}
	}
	if ((fp = fopen("lianxiren.txt","w")) == NULL)
	{
    
		printf(" fail to open file ！\n");
		exit(0);
	}
	writelisttofile(fp, head);
	fclose(fp);
	}