Simple fruit management system written in C language-EEWORLD

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//Write a simple fruit management system
//1. You can view all fruits
//2. You can add new fruits (check whether the fruit has the same name when adding)
//3. You can sort all fruits, price descending, quantity descending
//4. Delete the fruit with the specified name
//5. Exit the system
#include
#include
#include
typedef struct fruit{
char name[30]; //Fruit name
int count; //Fruit quantity
double price; //Fruit unit price
}fruit_t;
//Menu function
void log_menu();
//View function
void check(fruit_t *p,int *count1);
//Add function
int add(fruit_t *p,int *count1);
//Function control function
void log_ctrl(fruit_t *p,int *count1);
//Delete function
int del(fruit_t *p,int *count1);
//Sorting menu function
void cmp_menu();
//Sorting control function
void cmp_ctrl(fruit_t *p,int *count1);
//Sorting function by quantity
int cmp_count_desc(const void *px,const void *py);
//Sorting function by price
int cmp_price_desc(const void *px,const void *py);
//System initialization function
void log_start(fruit_t *p,int *count1);
//Save function
void write(fruit_t *p,int *count1);
int main(){
fruit_t stu[100]={""}; //Save all fruit names, quantities, unit prices
int count1=0; //count1 represents the number of fruit types
printf("Welcome to the fruit management system");
log_start(stu,&count1); //System initialization
printf("Initialization successful");
log_ctrl(stu,&count1); // Function control function
return 0;
}
//System initialization function
void log_start(fruit_t *p,int *count1){
FILE *fp=NULL;
int i=0;
fp=fopen("data","a+");
if(NULL==fp)
exit(1);
while(fread(&p[*count1],sizeof(fruit_t),1,fp))
*count1+=1;
fclose(fp);
}
//Function control function
void log_ctrl(fruit_t *p,int *count1){
int chose=0;

while(1){
chose=0;
log_menu();
printf("Please select:");
scanf("%d",&chose);
  switch(chose){
   case 1://View
    check(p,count1);
    break;
   case 2://Add
    if(add(p,count1)==1)
     printf("Add failed, this fruit already exists");
    else
     printf("Congratulations, added successfully");
    break;
   case 3://Sort
    cmp_ctrl(p,count1);
    break;
   case 4://Delete
    if(del(p,count1)==1)
     printf("Delete failed, there is no such fruit");
    else
     printf("Congratulations, deleted successfully");
    break;
   case 5://Exit
    write(p,count1); //Save
    printf("Information saved successfully");
    exit(0);
    break;
   default:
    printf("Input error, please re-enter!");
}
}
}
//Save function
void write(fruit_t *p,int *count1){
FILE *fp=NULL;
int i=0;
fp=fopen("data","w");
if(NULL==fp)
exit(2);
fwrite(p,sizeof(fruit_t),*count1,fp);
fclose;
}
//Sorting control function
void cmp_ctrl(fruit_t *p,int *count1){
int chose=0;

if(*count1==0){
printf("Fruit type is 0, sorting failed");
return;
}
while(1){
cmp_menu();
printf("Please select:");
scanf("%d",&chose);
  switch(chose){
   case 1: //Quantity
    qsort(p,*count1,sizeof(fruit_t),cmp_count_desc);
    printf("Sorting successful");
    break;
   case 2: //Price
    qsort(p,*count1,sizeof(fruit_t),cmp_price_desc);
    printf("Sorted successfully");
    break;
   case 3: //Return
    return;
    break;
   default:
    printf("Input error, please re-enter");
}
}
}
//Sort by price sorting function
int cmp_price_desc(const void *px,const void *py){
const fruit_t *p1=px;
const fruit_t *p2=py;
if(p1->price>p2->price)
return -1;
else if(p1->priceprice)
return 1;
else
return 0;
}
//Sort by quantity function
int cmp_count_desc(const void *px,const void *py){
const fruit_t *p1=px;
const fruit_t *p2=py;
if(p1->count>p2->count)
return -1;
else if(p1->countcount)
return 1;
else
return 0;
}
//Sorting menu function
void cmp_menu(){
printf("1. Sort by quantity 2. Sort by price 3. Return");
}
//Delete function 0-success 1-failure
int del(fruit_t *p,int *count1){
int i=0,j=0; //j saves the subscript of the fruit to be deleted
char str[30]="";
int flag=0;
printf("Please enter the name of the fruit to be deleted:");
scanf("%s",str);
flag=0;
for(i=0;i<=*count1;i++){
if(strcmp(p[i].name,str)==0){
   flag=1;
   j=i;
   break;
}
}
if(flag==0)
return 1;
for(i=j;i<*count1-1;i++){
strcpy(p[i].name,p[i+1].name);
p[i].count=p[i+1].count;
p[i].price=p[i+1].price;
}
*count1-=1;
return 0;
}
//Add function, 1-failure 0-success
int add(fruit_t *p,int *count1){
int i=0;
printf("Fruit name: ");
scanf("%s",p[*count1].name);
for(i=0;i<*count1;i++)
if(strcmp(p[*count1].name,p[i].name)==0)
   return 1;
printf("Quantity:");
scanf("%d",&p[*count1].count);
printf("Price:");
scanf("%lf",&p[*count1].price);
*count1+=1;
return 0;
}
//View function
void check(fruit_t *p,int *count1){
int i;
if(*count1==0){
printf("Fruit type is 0 ");
return;
}
printf("Fruit quantity unit price ");
for(i=0;i<*count1;i++)
printf("%s %d %.2lf ",p[i].name,p[i].count,p[i].price);
}
//Menu function
void log_menu(){
printf("1. View 2. Add 3. Sort 4. Delete 5. Exit");
}

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