C.での在庫プログラム在庫をアイテムから削除する方法についてのヘルプが必要

Question

これは在庫を保持するプログラムです。プログラムは、オプションのメニューを表示します。エントリ関数を削除する以外は、他のすべてが完璧に機能します。私はそれが機能を削除する方法を知らない。私は場所を見つけるために変数を置くが、私は本当にどのように考えていない。私は削除される項目名を入力し、次に表示項目を入力すると無限の混乱に陥ります。誰かがアイテムを選択して在庫から削除する方法を教えてください。

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

（インデックスitemで）目的のエントリを上書きします。このコードと：それは改善するべきであるが は、それがビジュアル・スタジオ2010年に使用され、ここで、あなたのコーディングスタイル次のコード

#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

です最後のインデックス（size）を1つ減らしてください。