C Language to Realize canteen Dining Management System (with linked list)

  • 2020-06-19 11:30:09
  • OfStack

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


#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define N 20
#define M 20
struct student
{char num[20];
 char name[10];
 float dietfee;
 
};
struct diet
{char date[20];
char breakfast[100];
char lunch[100];
char supper[100];
};
void menu();
void reads();
void readss();
void addstudent();
void adddiet();
void addfee();
void query();
void show();
void dele();
void midefy();
void main()

{
 int n;
 while(1)
 { 
 menu();
 printf("\n  Please enter the operation number you want to select: ");
 scanf("%d",&n);
 switch(n)
 {case 1: addstudent();break;
 case 2: show();break;
 case 3: adddiet();break;
 case 4: addfee();break;
 case 5: query();break;
 case 6: dele();break;
 case 7: midefy();break;
 case 8: exit(0);
 default: printf(" Typo! \n ");
 }
 }
}
void menu()
{printf(" ****************************  Canteen dining fee management system ************************ ");
 printf("\n       1  Add Student information ");
 printf("\n       2  Display student information ");
 printf("\n       3  Add recipe information ");
 printf("\n       4  Add the meal fee according to the student number ");
 printf("\n       5  Look up recipes for a particular day ");
 printf("\n       6  Delete student information ");
 printf("\n       7  Modify student information ");
 printf("\n       8  exit ");
}
 void reads(struct student stu[N],int *n) // Read the student information file 
{
 FILE *fp;
 int i=0;
 if((fp=fopen("studenttt.txt","rb"))==NULL)
 { printf(" File opening failed! \n");
 return;
 }
 else
 {
 *n=getw(fp);
 for(i=0;i<*n;i++)
  fread(&stu[i],sizeof(struct student),1,fp);
 }
 fclose(fp);
}
void addstudent() // Add Student information 
{FILE *fp;
 int n,i,j;
 struct student stu;
 if((fp=fopen("studenttt.txt","rb+"))!=NULL) // Read and write 
 {j=getw(fp);
 rewind(fp);
 printf(" Please enter the number of students to add: "); 
 scanf("%d",&n);
 putw(j+n,fp);
 fseek(fp,0L,2); // Move position pointer 
 for(i=1;i<=n;i++)
 { printf("\n Please enter the first %d Student id and name of each student: \n",i);
  scanf("%s%s",stu.num,stu.name);
  printf("\n Please enter the first %d Total meal cost for each student: \n",i);
  scanf("%f",&stu.dietfee);
  fwrite(&stu,sizeof(struct student),1,fp);  // To a file to write 1 Set of data 
 }
 }
 else // If the file does not exist, create it 1 , and writes the data to that file 
 { 
 if((fp=fopen("studenttt.txt","wb"))!=NULL)  // Just write 
 {
 printf(" Please enter the number of students to add: "); 
  scanf("%d",&n);
  putw(n,fp);
 for(i=1;i<=n;i++)
 { printf("\n Please enter the first %d Student id and name of each student: \n",i);
  scanf("%s%s",stu.num,stu.name);
  printf("\n Please enter the first %d Total meal cost for each student: \n",i);
  scanf("%f",&stu.dietfee);
  fwrite(&stu,sizeof(struct student),1,fp);
 }
 }
 } 
 fclose(fp);
}
void readss(struct diet die[M],int *t) // Read the recipe file 
{
 FILE *fp2;
 int i=0;
 if((fp2=fopen("diet.txt","rb"))==NULL)
 { printf(" File opening failed! \n");
 return;
 }
 else
 {
 *t=getw(fp2);
 for(i=0;i<*t;i++)
  fread(&die[i],sizeof(struct diet),1,fp2);
 }
 fclose(fp2);
}
void adddiet() // Add recipe information 
{FILE *fp2;
 int n,i,j;
 struct diet die;
 if((fp2=fopen("diet.txt","rb+"))!=NULL)
 {j=getw(fp2);
 rewind(fp2);
 printf(" Please enter the number of recipes to add: "); 
 scanf("%d",&n);
 putw(j+n,fp2);
 fseek(fp2,0L,2);
 for(i=1;i<=n;i++)
 { printf("\n Please enter the first %d Date of recipe: \n",i);
  scanf("%s",die.date);
  printf("\n Please enter the first %d Three recipes for breakfast and fare, lunch and fare, dinner and fare: \n",i);
  scanf("%s%s%s",&die.breakfast,&die.lunch,&die.supper);
  fwrite(&die,sizeof(struct diet),1,fp2);
 }
 }       
 else   // If the file does not exist, create it 1 , and writes the data to that file         
 { 
 if((fp2=fopen("diet.txt","wb"))!=NULL)
 {
 printf(" Please enter the number of recipes to add: "); 
  scanf("%d",&n);
  putw(n,fp2);
 for(i=1;i<=n;i++)
 { printf("\n Please enter the first %d Date of recipe: \n",i);
   scanf("%s",die.date);
   printf("\n Please enter the first %d Three recipes for breakfast and fare, lunch and fare, dinner and fare: \n",i);
   scanf("%s%s%s",&die.breakfast,&die.lunch,&die.supper);
   fwrite(&die,sizeof(struct diet),1,fp2);
 }
 }
 } 
 fclose(fp2);
}
void show()   // Display student information 
{struct student stu[N];
 int i,n;
 reads(stu,&n);
 if(n==0)
 return;
 for(i=0;i<n;i++)
 printf("\n  Student number:  %s The name : %s Bill: %f\n",stu[i].num,stu[i].name,stu[i].dietfee);
}
void addfee()  // Add the student meal fee 
{struct student stu[N],temp;
 int n,i;
 float g;
 FILE *fp;
 printf("\n Please enter the student number to increase the meal fee: ");
 scanf("%s",temp.num);
 reads(stu,&n);
 for(i=0;i<n;i++)
 if(strcmp(temp.num,stu[i].num)==0)
 break;
 if(i>=n)
 {printf(" No student information is available !\n");
 return;
 }
 printf("\n Please enter the amount to increase the student's meal fee: \n");
 scanf("%f",&g);
 stu[i].dietfee+=g;
 /*strcpy(stu[i].dietfee,temp.dietfee);*/
 if((fp=fopen("studenttt.txt","wb"))==NULL)
 {printf(" Failed to open file! ");
 return;
 }
 putw(n,fp);
 for(i=0;i<n;i++)
 fwrite(&stu[i],sizeof(struct student),1,fp);
 fclose(fp);
}

void query()   // Search for recipe information for a particular day  
{
 struct diet die[M];
 char date[20];
 int i,n;
 readss(die,&n);
 printf("\n Please enter the date of the recipe to be inquired: \n");
 scanf("%s",date);
 for(i=0;i<n;i++)
 if(strcmp(date,die[i].date)==0) break;
 if(i>=n)
 {printf(" No recipe information for that day found! \n");
 return;
 }
 else
  printf("\n  Date: %s breakfast %s Lunch: %s Dinner: %s\n",die[i].date,die[i].breakfast,die[i].lunch,die[i].supper);
 }
 
void dele() // Delete student information 
{
 struct student stu[N];
 struct student stu2[N];
 int i,n,m,s;
 FILE *fp;
 
 int j;
 char num2[20];
 printf(" Please enter the student id you want to delete: "); 
 scanf("%s",&num2);
 reads(stu,&n);
 if(n==0)
 {
  printf(" No students can delete it! "); 
 return;
 }
 for(m=0,i=0;i<n;i++){

     

 if(strcmp(stu[i].num,num2)!=0)
 { 
  
  strcpy(stu2[m].num,stu[i].num);
  strcpy(stu2[m].name,stu[i].name);
  stu2[m].dietfee =stu[i].dietfee;
  s=1;
  m++;
  
 }else{

   continue; 
 }
 }
 if(s==0){
 
 printf(" The student does not exist! "); 
 return;

 } else{
   
   if((fp=fopen("studenttt.txt","wb"))!=NULL)  // Just write 
 {
 
 putw(m,fp);
 for(j=0;j<m;j++)
 { 

 fwrite(&stu2[j],sizeof(struct student),1,fp);
 }
 }

  fclose(fp);
  
 printf(" Delete successful! \n"); 
 }
}
void midefy(){ // Revise according to student number 
 struct student stu[N];
 struct student stu2[N];
 int i,n,m,s;
 FILE *fp;
 
 int j;
 char num2[20];
 printf(" Please enter the student id you want to modify: "); 
 scanf("%s",&num2);
 reads(stu,&n);
 if(n==0)
 {
  printf(" No student can change it! \n"); 
 return;
 }
 for(m=0,i=0;i<n;i++,m++){

     

 if(strcmp(stu[i].num,num2)!=0)
 { 
  
  strcpy(stu2[m].num,stu[i].num);
  strcpy(stu2[m].name,stu[i].name);
  stu2[m].dietfee =stu[i].dietfee;
 
 
  
 }else{ 
   s=1;
   strcpy(stu2[m].num,stu[i].num);
     printf("\n You need to change the student's student number to %s : \n",stu[i].num);
   printf("\n Please enter the student's name :");
     scanf("%s",stu2[m].name);
  printf("\n Please enter the student's total meal fee: \n",i);
  scanf("%f",&stu2[m].dietfee);
  
  continue;
  
 }
 }
 if(s==0){
 
 printf(" The student does not exist! \n"); 
 return;

 } else{
   
   if((fp=fopen("studenttt.txt","wb"))!=NULL)  // Just write 
 {
 
 putw(m,fp);
 for(j=0;j<m;j++)
 { 

 fwrite(&stu2[j],sizeof(struct student),1,fp);
 }
 }

  fclose(fp);
  
 printf(" Modified successfully! \n"); 
 }
}

Source code download: C language meal management system

For more information, please pay attention to the topic management System Development.


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