C의 인벤토리 프로그램 인벤토리에서 항목을 삭제하는 방법에 대한 도움이 필요합니다.

Question

인벤토리를 보유하고있는 프로그램입니다. 프로그램에 옵션 메뉴가 표시됩니다. 항목 기능을 삭제하는 것 외에는 다른 모든 기능이 완벽하게 작동합니다. 어떻게 함수를 삭제할 수 있는지 모르겠습니다. 위치를 찾기 위해 변수를 두었지만 실제로 어떻게되는지 모릅니다. 삭제할 항목 이름을 입력 한 다음 표시 항목을 입력하면 무한한 혼란이 발생합니다. 누군가 항목을 선택하고 인벤토리에서 항목을 삭제하는 방법에 대해 도움을 받으십시오.

void remove_item(gaming entry[], int *size, int item) { 
    memcpy(&entry[item], &entry[*size], sizeof(entry[0])); 
    *size = *size - 1; 
} 

(인덱스 item에서) 원하는 항목을 우선합니다이 코드 : 그것을 개선해야하지만 는 그것은 비주얼 스튜디오 2010에서 사용되는, 여기, 당신의 코딩 스타일에 따라 코드

#include <stdio.h> 
#include <string.h> 
#include <ctype.h> 
#define SIZE 25 
#define MAX 100 

    typedef struct { 
    char item[SIZE]; //item for the company 
    char company[SIZE]; //company that sells the item 
    int intStock; //how many of the item are instock 
    char lastShipDate[SIZE]; //last ship date of that item 
    double cost; //cost to make the item 
    double price; //price of the item 
    } gaming; 

//prompts the user to get a selection 
int Menu(void); 

//display the options to the user 
void DisplayOptions(void); 

//display some entries for inventory 
void HardCodeEntries(gaming entry[],int *size); 

//function to add a new entry to the inventory 
void AddNewEntry(gaming entry[], int *size); 

//function to delete a selected entry from inventory 
void Delete(gaming entry[], int *size, int location); 

//display the current inventory to screen 
void Display(gaming entry[], int size); 

//save the current inventory to file 
void SaveInventory(gaming br[], int *size); 

//clears out the entire inventory 
void Clear(int *size); 

//load the inventory from the file that is being saved 
void LoadSalesRecords(gaming br[], int *size); 

//find location of entry that is going to be edited or deleted 
int FindLocation(gaming entry[], int size); 

//display the options for editing an entry 
int EditMenuOptions(void); 

//function to edit selected entry 
void Edit(gaming entry[], int location); 

int main() 
{ 
    int selection; 
    gaming entry [150]; 
    int size=0; 
    char trash; 
    int choice; 
    int location; 

    //display size of inventory before and after 
    printf("\nSIZE before: %d", size); 
    HardCodeEntries(entry, &size); 
    printf("\nSIZE after: %d\n\n", size); 

    DisplayOptions(); 

    selection= Menu(); 

    while(selection != 8) 
    { 
      if (selection==1) 
      { 
       printf("ADD ENTRIES\n\n"); 
       //display size of inventory before adding entries 
       printf("\nSIZE BEFORE ADDING: %d\n", size); 

       AddNewEntry(entry, &size); 

       //display size of inventory after adding entries 
       printf("\nSIZE AFTER ADDING: %d\n", size); 
      } 
      else if(selection==2) 
      { 
       printf("DELETE\n\n"); 
       //get location of entry to be deleted 

       location = FindLocation(entry,size); 
       printf("\nLOCATION: %d\n", location); 

       Delete(entry, &size, location); 
      } 
      else if(selection==3) 
      { 
       printf("EDIT\n\n"); 

       //get the location of entry to be edited 
       location = FindLocation(entry, size); 

       printf("\nLOCATION: %d\n", location); 
       Edit(entry, location); 
      } 
      else if(selection==4) 
      { 
       printf("DISPLAY OF INVENTORY\n\n"); 
       Display(entry, size); 
      } 
      else if(selection==5) 
      { 
       printf("SAVING CURRENT INVENTORY TO FILE\n\n"); 
       SaveInventory(entry, &size); 
       //saves to file 
      } 
      else if(selection==6) 
      { 
       printf("CLEARING ENTIRE DATA\n\n"); 
       Clear(&size); 
      } 
      else if(selection==7) 
      { 
       printf("LOADING SALES RECORDS FROM FILE\n\n"); 
       LoadSalesRecords(entry, &size); 
      } 
      else 
      { 
       printf("COMMAND NOT RECOGNIZED\n\n"); 
      } 

      printf("\n\n"); 
      DisplayOptions(); 

      //clears buffer 
      scanf("%c", &trash); 

      selection = Menu(); 
    } 

    if (selection==8) 
    { 
     printf("\nHAVE A NICE DAY!!!\n\n"); 
    } 
    return 0; 
} 

//display the options to the user 
void DisplayOptions(void) 
{ 
    printf("HELLO, WELCOME TO THE INVENTORY PROGRAM.\n"); 
    printf("THIS PROGRAM HOLDS INVENORY FOR ELECTRONICS COMPANIES ALONG WITH THEIR ITEMS, COST TO PRODUCE, PRICE,\n"); 
    printf("LAST SHIP DATE AND NUMBER IN STOCK\n"); 
    printf("THERE ARE COMPANIES IN THE INVENTORY ALREADY\n"); 
    printf("*********************************************\n\n"); 
    printf("HERE ARE YOUR OPTIONS\n"); 
    printf("1--ADD A NEW ENTRY\n"); 
    printf("2--DELETE AN ENTRY\n"); 
    printf("3--EDIT AN ENTRY\n"); 
    printf("4--DISPLAY THE INVENTORY\n"); 
    printf("5--SAVE CURRENT INVENTORY TO FILE\n"); 
    printf("6--CLEAR THE ENTIRE INVENTORY\n"); 
    printf("7--LOAD SALES RECORD FROM FILE\n"); 
    printf("8--QUIT\n"); 
} 

//prompts the user to get a selection 
int Menu(void) 
{ 
    int selection; 
    printf("\nENTER SELECTION: "); 
    scanf("%d", &selection); 

    return selection; 
} 

//display some entries for inventory 
void HardCodeEntries(gaming entry[], int *size) 
{ 
    strcpy(entry[0].item,"Xbox360"); 
    strcpy(entry[0].lastShipDate,"04/10/12"); 
    entry[0].cost=200.00; 
    strcpy(entry[0].company,"Microsoft"); 
    entry[0].price=300.0; 
    entry[0].intStock=150; 

    *size = *size + 1; 

    strcpy(entry[1].item,"PlayStation3"); 
    strcpy(entry[1].lastShipDate,"04/10/12"); 
    entry[1].cost=200.00; 
    strcpy(entry[1].company,"Sony"); 
    entry[1].price=450.00; 
    entry[1].intStock=100; 

    *size = *size + 1; 

    strcpy(entry[2].item,"XboxController"); 
    strcpy(entry[2].lastShipDate,"04/10/12"); 
    entry[2].cost=25.00; 
    strcpy(entry[2].company,"Microsoft"); 
    entry[2].price=50.00; 
    entry[2].intStock=50; 

    *size = *size + 1; 

    strcpy(entry[3].item,"PS3Controller"); 
    strcpy(entry[3].lastShipDate,"04/10/12"); 
    entry[3].cost=30.00; 
    strcpy(entry[3].company,"Sony"); 
    entry[3].price=45.00; 
    entry[3].intStock=50; 

    *size = *size + 1; 

    strcpy(entry[4].item,"Wii"); 
    strcpy(entry[4].lastShipDate,"04/10/12"); 
    entry[4].cost=100.00; 
    strcpy(entry[4].company,"Nintendo"); 
    entry[4].price=200.00; 
    entry[4].intStock=150; 

    *size = *size + 1; 

} 

//function to add a new enty to the inventory 
void AddNewEntry(gaming entry[], int *size) 
{ 
    printf("\nENTER ITEM:\t\t"); 
    scanf("%s", entry[*size].item); 

    printf("ENTER SHIP DATE:\t"); 
    scanf("%s", entry[*size].lastShipDate); 

    printf("ENTER COST TO MAKE:\t\t"); 
    scanf("%lf", &entry[*size].cost); 

    printf("ENTER COMPANY:\t\t"); 
    scanf("%s", entry[*size].company); 

    printf("ENTER PRICE:\t\t"); 
    scanf("%lf", &entry[*size].price); 

    printf("ENTER NUMBER IN STOCK:\t"); 
    scanf("%d", &entry[*size].intStock); 

    *size = *size + 1; 
} 

//function to delete a selected entry from inventory 
void Delete(gaming entry[], int *size, int location) 
{ 
    entry[location] = entry[*size - 1]; 
    *size = *size - 1; 
} 

//display the current inventory onto the screen 
void Display(gaming entry[], int size) 
{ 
    int i; 
    for(i=0; i<size; i++) 
    { 
     printf("\n"); 
     printf("ITEM:\t\t %s\n", entry[i].item); 
     printf("LAST SHIP DATE:\t %s\n", entry[i].lastShipDate); 
     printf("COST:\t\t %4.2f\n",entry[i].cost); 
     printf("COMPANY:\t %s\n", entry[i].company); 
     printf("PRICE:\t\t %4.2f\n", entry[i].price); 
     printf("IN STOCK:\t %d\n", entry[i].intStock); 
    } 
} 

//save the current inventory to a file 
void SaveInventory(gaming br[], int *size) 
{ 
    FILE *outp; 

    if((outp = fopen("output.txt","w"))==0) 
    { 
     printf("\nCANNOT OPEN FILE\n"); 
     return; 
    } 

    //connect to the file 
    outp= fopen("output.txt","w"); 

    fprintf(outp,"%d", *size); 
    fwrite(br, sizeof(gaming),*size,outp); 

    //close file pointer 
    fclose(outp); 
} 

//clears out the entire inventory 
void Clear(int *size) 
{ 
    *size = 0; 
} 

//load the inventory from the file that is being saved 
void LoadSalesRecords(gaming br[], int *size) 
{ 
    FILE * inp; 

    if((inp = fopen("output.txt","r"))==0) 
    { 
     printf("CANNOT OPEN FILE\n"); 
     return; 
    } 
    //connect to file 
    inp = fopen("output.txt","r"); 

    fscanf(inp,"%d",size); 
    fread(br, sizeof(gaming),*size,inp); 

    //close file pointer 
    fclose(inp); 
} 

//find location of entry that is going to be edited or deleted 
int FindLocation(gaming entry[], int size) 
{ 
    int i; 
    int j; 
    int length; 
    char userItem[SIZE]; 

    //enter the item to delete 
    printf("ENTER ITEM TO EDIT OR DELETE: "); 
    scanf("%s", userItem); 
    length = strlen(userItem); 

    for(i=0; i<length; i++) 
    { 
     userItem[i] = toupper(userItem[i]); 
    } 
    printf("\nYOUR BRAND IN UPPER CASE IS: %s\n", userItem); 

    for(j=0; j<size; j++) 
    { 
     if(strcmp(entry[j].item,userItem)==0) 
     { 
      return j; 
     } 
    } 
    return -1; 
} 

//function to edit a selected entry 
void Edit(gaming entry[], int location) 
{ 
    int choice; 

    choice = EditMenuOptions(); 

    if(choice==1) 
    { 
     printf("\nENTER NEW ITEM: "); 
     scanf("%s", &entry[location].item); 
    } 
    else if(choice==2) 
    { 
     printf("\nENTER SHIP DATE: "); 
     scanf("%s", &entry[location].lastShipDate); 
    } 
    else if(choice==3) 
    { 
     printf("\nENTER COST TO MAKE: "); 
     scanf("%lf", &entry[location].cost); 
    } 
    else if(choice==4) 
    { 
     printf("\nENTER COMPANY: "); 
     scanf("%s", &entry[location].company); 
    } 
    else if (choice==5) 
    { 
     printf("\nENTER PRICE: "); 
     scanf("%lf", &entry[location].price); 
    } 
    else if (choice==6) 
    { 
     printf("\nENTER HOW MANY IN STOCK: "); 
     scanf("%d", &entry[location].intStock); 
    } 
    else if (choice==7) 
    { 

     printf("\nENTER NEW ITEM: "); 
     scanf("%s", &entry[location].item); 
     printf("\nENTER SHIP DATE: "); 
     scanf("%s", &entry[location].lastShipDate); 
     printf("\nENTER COST TO MAKE: "); 
     scanf("%lf", &entry[location].cost); 
     printf("\nENTER COMPANY: "); 
     scanf("%s", &entry[location].company); 
     printf("\nENTER PRICE: "); 
     scanf("%lf", &entry[location].price); 
     printf("\nENTER HOW MANY IN STOCK: "); 
     scanf("%d", &entry[location].intStock); 
    } 
    else 
    { 
     printf("Invalid Entry"); 
    } 
} 

//display the options for edditing an entry 
int EditMenuOptions(void) 
{ 
    int choice; 

    printf("\nENTER 1 TO EDIT ITEM\n"); 
    printf("ENTER 2 TO EDIT DATE\n"); 
    printf("ENTER 3 TO EDIT COST\n"); 
    printf("ENTER 4 TO EDIT COMPANY\n"); 
    printf("ENTER 5 TO EDIT PRICE\n"); 
    printf("ENTER 6 TO EDIT NUMBERS IN STOCK\n"); 
    printf("ENTER 7 TO EDIT ALL DATA\n"); 
    printf("\nENTER SELECTION: "); 
    scanf("%d", &choice); 
    return choice; 
} 

Answer 1

입니다 마지막 색인 (size)을 1 줄이십시오.