C language implements weather information management system

This article shares the specific code of C language weather information management system for your reference. The specific content is as follows

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<windows.h>
#include<time.h>
#include<unistd.h>

#define TRUE 1
#define FALSE 0
#define OK  1
#define ERROR 0
#define OVERFLOW -1
typedef int Status;
typedef int ElemType;


typedef struct
{
 char Sweather[10];   // The weather conditions 
 double Htem;     // The highest temperature  
 double Ltem;  // The lowest temperature  
 double Stem;     // The temperature 
 double Shum;     // humidity 
}area;
typedef struct node
{
 int num;      // City Numbers 
 area weather;     // The weather in 
 char name[5];      // Place names 
 struct node *next;    
 
}*LinkList,LNode;   // Define structure 


int NUM=0;     // The global variable   Count number of nodes  

Status CreatList_L(LinkList &L,int n);      // Information input  
void Print_LinkList( LinkList H);       // Check the information  
int login();            // The login 
Status Delete_LinkList(LinkList &H);      // Remove nodes  
Status GetElem_L(LinkList &L);       // To find the  
Status changeElem_L(LinkList &L);      // Modify the  
int Clearlist(LinkList &L);       // Whole table deleted, 

void welcome(LinkList &L);       //welcome   
void menu2(LinkList &L);        // Administrator menu  
void menu1(LinkList &L);        // The user menu  
void printf_node(node*p);        // Output node  
void my_return(LinkList &L);       //return 
void clothes(node *p);        // Dressing index  
void save_node(LinkList &L,int i);     // Save the node to the file 
void read_node(LinkList &L) ;      // Read from file  
int Register();          // registered  
int signin();          // The login  




void read_node(LinkList &L)       // Read from file  
{ 
 LNode *p,*pr;
 int i,n;
 pr=L;
 
 FILE *fp;
 if((fp=fopen("weatherinformation.txt","r"))==NULL)
 {
 printf(" Failed to open file ");
 exit(0);
 }

 fscanf(fp,"%d",&n); // Read the number of nodes from the file  
 
 for(i=1;i<=n;i++)
 {
 p=(LinkList)malloc(sizeof(LNode));
  fscanf(fp,"%d",&p->num);
 fscanf(fp,"%s",p->name);
 fscanf(fp,"%s",p->weather.Sweather);
 fscanf(fp,"%lf%lf",&p->weather.Ltem,&p->weather.Htem);
 p->weather.Stem=(p->weather.Htem+p->weather.Ltem)/2;
 fscanf(fp,"%lf",&p->weather.Shum);
  p->next=NULL;

 while(pr->next!=NULL){
  pr=pr->next;
 } 

 p->next=pr->next;
 pr->next=p;
 pr=pr->next;
  NUM++;
 }
 fclose(fp);
}


void save_node(LinkList &L)      // Save to file  
{ 
 
 LNode *p,*pr;
 pr=L; 
 FILE *fp;
 if((fp=fopen("weatherinformation.txt","w"))==NULL)
 {
 printf(" Failed to open file ");
 exit(0);
 }
 fprintf(fp,"%d\n",NUM);
 while(pr->next!=NULL)
 {
 p=pr->next;
 fprintf(fp,"%d ",p->num);
  fprintf(fp,"%s ",p->name);
 fprintf(fp,"%s ",p->weather.Sweather);
 fprintf(fp,"%lf %lf ",p->weather.Ltem,p->weather.Htem);
 fprintf(fp,"%lf\n",p->weather.Shum);
 pr=pr->next;  
 }
 printf(" Save successfully!! "); 
 fclose(fp);
}



int Register()        // registered  
{
 FILE* fp;
 char name[10],passworld[10];
 
 if((fp=fopen("demo.txt","a"))==NULL)
 {
 printf(" Failed to open file ");
 exit(0); 
 }
 printf(" Please enter the user name :");
 scanf("%s",name);
 fprintf(fp,"%s ",name);
 printf(" Please enter your password: ");
 scanf("%s",passworld);
 fprintf(fp,"%s\n",passworld);
 fclose(fp);
 printf(" Registered successfully !"); 
 return OK;
}
int signin()         // The login  
{ FILE* fp;
 char name[10],passworld[10];    // The account password entered by the user  
 char name1[10],passworld1[10];   // The account and password read from the file  
 int flag=0;
 
 if((fp=fopen("demo.txt","r"))==NULL)
 {
 printf(" Failed to open file ");
 exit(0);
 }
 
 printf(" Enter user name :");
 scanf("%s",name);
 printf(" Enter the password :");
 scanf("%s",passworld); 
 
 while(!flag&&!feof(fp))
 { 
 fscanf(fp,"%s",name1);
 fscanf(fp,"%s",passworld1);
 if(strcmp(name,name1)==0&&strcmp(passworld,passworld1)==0)
 flag=1;
 }
 fclose(fp);
 
 return flag;
}
int login()            //login
{
 char f;
 int H;
 char a[10],ah[10],am[10];
 char b[10],bh[10],bm[10];
 FILE *fp;

 printf("1. Registered! \n");
 printf("2. Login! \n");
 scanf("%d",&H);
 if(H==1)
 {
 Register();
 
 while(1){ 
 printf(" Are you logged in? y or n\n");
 getchar();
 scanf("%c",&f);
 system("cls");
 
 if(f=='n')
 exit(0);
 else if(f=='y')
 { 
 if(signin())
 {
  printf(" Login successful! \n");
  return OK;
 }
 else 
 printf(" Password or user error !\n"); 
 }
 
 }
}
else if(H==2)
 while(1){
 
 if(signin())
 {
  printf(" Login successful! \n");
  return OK;
 }
 else
 printf(" Password or user error !\n");
 
 } 
 return 0;
}
void clothes(node *p)          // Dressing index  
{
 
 if(p->weather.Stem>=28)
 printf(" Summer clothing: light cotton fabric made of short clothing, short skirts, thin short skirts, shorts \n\n");
 else if(p->weather.Stem>=24&&p->weather.Stem<28)
 printf(" Summer wear: cotton linen shirt, thin skirt, thin T The T-shirt \n\n");
 else if(p->weather.Stem>=21&&p->weather.Stem<24)
 printf(" Spring and Autumn transition clothing: short suit made of single layer cotton and linen fabric, T T-shirt, thin jeans and trousers, casual wear, professional suit \n\n");
 else if(p->weather.Stem>=18&&p->weather.Stem<21)
 printf(" Spring and Autumn transitional outfit: suit, jacket, windbreaker, casual outfit, jacket, suit, thin sweater \n\n");
 else if(p->weather.Stem>=15&&p->weather.Stem<18)
 printf(" Spring and Autumn clothing: windbreaker, coat, coat, sweater, wool suit, suit, cold clothing \n\n");
 else if(p->weather.Stem>=11&&p->weather.Stem<15)
 printf(" Autumn and winter outfit: sweater, windbreaker, wool suit, suit \n\n");
 else if(p->weather.Stem>=6&&p->weather.Stem<11)
 printf(" Winter clothing: winter coat, winter coat, leather jacket, tweed coat, felt hat, gloves, down jacket, fur coat \n\n");
 else
 printf(" Winter clothing: winter coat, winter coat, leather jacket, tweed coat, felt hat, gloves, down jacket, fur coat \n\n");

}
Status CreatList_L(LinkList &L)        /*  Information input  */
 {
 
 LNode *p,*pr;
 int i,n;
 printf(" Please enter the locale ");
 scanf("%d",&n);
 
 pr=L;
 for(i=n;i>0;i--)
 {
  p=(LinkList)malloc(sizeof(LNode));
  printf(" Please enter the city number \n");
 scanf("%d",&p->num);
 printf(" Please enter place name \n");
  scanf("%s",p->name);
 printf(" Please enter the weather conditions for this area \n");
 scanf("%s",p->weather.Sweather);
 printf(" Minimum and maximum temperatures \n"); 
 scanf("%lf%lf",&p->weather.Ltem,&p->weather.Htem);
 p->weather.Stem=(p->weather.Htem+p->weather.Ltem)/2;
 printf(" Relative humidity \n");
 scanf("%lf",&p->weather.Shum);
 p->next=NULL;
 while(pr->next!=NULL){
  pr=pr->next;
 } 

 p->next=pr->next;
 pr->next=p;
 pr=pr->next;
 NUM++; 
 }
 
 return OK;
 }
void printf_node(node*p)            // The output 1 A node  
{
  printf("%s The weather is: %s\n",p->name,p->weather.Sweather);
 printf(" The minimum temperature is: %.2lf The highest temperature is: %.2lf , the average temperature is: %.2lf The degree of \n",p->weather.Ltem,p->weather.Htem,p->weather.Stem);
 printf(" Relative humidity is: %.1lf%%\n",p->weather.Shum);
 clothes(p); 
}
void my_return(LinkList &L,int n)         //my_return
{
 char f;
 while(1){

 printf(" Return to menu or not?  y or n\n");
 getchar();
 scanf("%c",&f);
 if((f=='y'||f=='Y'))
 {
  if(n==1)
  menu1(L);
  else if(n==2)
  menu2(L);
 }
  
 
 else if(f=='n'||f=='N')
 {
 printf("bye-bye");
 exit(0);
 }
 }
}
void Print_LinkList( LinkList H)  /*  Output chain table  */
{
 LNode *p;
 p=H->next;
 if(p==NULL){
 printf(" No data stored \n");
 return ;
 }
 
 while(p!=NULL) 
 {
  printf_node(p);
 
 p=p->next;
 }
printf("\n");
 }

Status Delete_LinkList(LinkList &H) /*  Delete table serial number is i The record of  */
 {
 
 int i;
  int j=1;
  LNode *p,*pr;
  p=H;
  if(NUM==0){
 printf(" No data stored \n");
 return 0;
 }
  printf(" Please enter the city number \n");
  scanf("%d",&i);
  while(p&&i!=p->next->num)
  {
   p=p->next;
   
  }
  if(!p) {
  printf(" There is no city \n");
  return ERROR;}
  pr=p->next;
  p->next=pr->next;
  free(pr);
  printf(" Delete successful! \n");
  NUM--;
  return OK;
  
}/* Delete_LinkList */

 
int Clearlist(LinkList &L)    // Whole table deleted, 
 {
 LNode *p,*q;
 system("cls");
 printf(" Please confirm whether you have obtained the highest permission. y or n\n");
 getchar();
 getchar();
 printf("ERROR ! You don't have the highest authority! ");
 exit(0); 
 p=L->next;
 while(p)
 {
 q=p->next ;
 free(p);
 p=q;
 NUM--;
 }
 L->next=NULL;
 save_node(L); 
 return 1;
 } 
Status GetElem_L(LinkList &L)    // To find the 
{
 int num;
 char a[5]; 
 int j=1;
 printf(" Please enter the city name \n");
 scanf("%s",&a); 
 LinkList p;
 p=L->next;
 while(p&&strcmp(p->name,a)!=0)
 {
  p=p->next;
  
 }
 if(!p){
  printf(" There is no city! ");
 return ERROR; 
 }
 
 printf_node(p);
 return OK;
}
Status changeElem_L(LinkList &L)           // Modify the  
{
 int num;
 int j=1;
 printf(" Please enter the city number \n");
 scanf("%d",&num); 
 LinkList p;
 p=L->next;
 while(p&&num!=p->num)
 {
  p=p->next;
  
 }
 if(!p){printf(" There is no city! \n");
 return ERROR;
 }
 printf_node(p);
 
  printf(" Please amend: \n");
 printf(" Please enter place name \n");
  scanf("%s",p->name);
  printf(" Please enter the city number \n");
 scanf("%d",&p->num);
 printf(" Please enter the weather conditions for this area \n");
 scanf("%s",p->weather.Sweather);
 printf(" Maximum and minimum temperatures \n"); 
 scanf("%lf%lf",&p->weather.Htem,&p->weather.Ltem);
 p->weather.Stem=(p->weather.Htem+p->weather.Ltem)/2;
 printf(" Relative humidity \n");
 scanf("%lf",&p->weather.Shum);
 
 printf(" The modified information is: \n");
 printf_node(p);
 return OK;
}
void menu1(LinkList &L)            // The user menu 
{
 int choose;
 system("cls");
       
 printf("\n\n");
 printf("\t\t\t**************** The user menu ****************\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t*    Have a good time     *\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t*  Press to find information  1 --  Overview please click  2  *\n");
 printf("\t\t\t*    Exit please click  3    *\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t****************************************\n");
 printf("\n\t\t\t\t  Press to enter the administrator menu 0\n");
 scanf("%d",&choose);

 switch(choose)
 {
 case 0:menu2(L);break;
 case 1:GetElem_L(L); my_return(L,1);break;
 case 2:Print_LinkList(L); my_return(L,1);break;
 case 3:exit(0) ;break; 
 default:menu1(L);  
 }
}
void menu2(LinkList &L)             // Administrator menu  
{
 int choose;
 system("cls");
 
 printf("\n\n");
 printf("\t\t\t**************** Administrator menu ****************\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t*   Please press for information entry  1 --  To delete information, click  2 *\n");
 printf("\t\t\t*   Press for information  3 --  Please press to modify the information  4 *\n");
 printf("\t\t\t*   Please click to view the information  5 --  Save and exit the press  6 *\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t*   Clear all data press 8     *\n");
 printf("\t\t\t*          *\n");
 printf("\t\t\t******************************************\n");
 printf("\n\t\t\t\t  Click to enter the user menu 0\n");
 scanf("%d",&choose);

 switch(choose)
 {
  case 0:menu1(L);break;
 case 1:CreatList_L(L) ;my_return(L,2);break;
 case 2:Delete_LinkList(L) ;my_return(L,2);break;
 case 3:GetElem_L(L) ;my_return(L,2);break;
 case 4:changeElem_L(L); my_return(L,2);break;
 case 5:Print_LinkList(L); my_return(L,2);break;
 case 6:save_node(L);exit(0);
 case 8:Clearlist(L);break;
 default :menu2(L);
 }
}
void welcome(LinkList &L)            //welcome
{ 
 int a;
 login();
 printf(" User login please press 1\n");
 printf(" Please click for administrator login 2\n");
 while(3>2)
 {
 scanf("%d",&a);
 if(a==1)
 { menu1(L);
 break;
 }
 else if(a==2)
 {
 menu2(L);
 break;
 }
 else
 {
 printf(" Typo! Please re-enter \n");
 continue;
 }
 }
}



int main()  //main
{
 int i=0;
 LinkList L;
 L=(LNode*)malloc(sizeof(LNode));
 L->next=NULL;
 printf("\n\n\n\n\t\t\t Please wait while you read data from the file ");
 read_node(L);
 while(i<3)
 { printf(".");
 sleep(1);
 i++;
 }
 printf("\n\n\t\t\t Read successfully!! \n");
 system("pause"); 
 system("cls");
 welcome(L);
 return 0;
}

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