update_testing.txt

int update(){
    FILE *inventoryp1=fopen("inventory.csv","r+");
    FILE *inventoryp2=fopen("inventory_copy.csv","w+");
    int id, newqty, newprice;
    printf("Enter the ID of the item you want to update: ");
    scanf("%d", &id);
    printf("Enter new quantity: ");
    scanf("%d", &newqty);
    printf("Enter new price: ");
    scanf("%d", &newprice);
    int found = 0;
    int currentId, currentQuantity, currentPrice, currentpos=-1;
    char currentName[50];
    while (fscanf(inventoryp1, "%d,%49[^,],%d,%d", &currentId, currentName, &currentQuantity, &currentPrice) == 4) {
        if (currentId == id) {
            //fseek(inventoryp1, (currentpos+1), SEEK_SET);
            printf("Previous Values: \n");
            printf("%d, %s, %d, %d\n", id, currentName, currentQuantity, currentPrice);
            printf("Updated Values: \n");
            printf("%d, %s, %d, %d\n", currentId, currentName, newqty, newprice);
            fprintf(inventoryp2, "%d,%s,%d,%d\n", currentId, currentName, newqty, newprice);
            found = 1;
            continue;
        }
        fprintf(inventoryp2, "%d,%s,%d,%d\n", currentId, currentName, currentQuantity, currentPrice);
        //currentpos=ftell(inventory);
    }
    if(found==0){printf("Item ID not found !!!");}
    fclose(inventory);
    return 1;
}



int update(){
    FILE *inventory=fopen("inventory.csv","r+");
    int id, newqty, newprice;
    printf("Enter the ID of the item you want to update: ");
    scanf("%d", &id);
    printf("Enter new quantity: ");
    scanf("%d", &newqty);
    printf("Enter new price: ");
    scanf("%d", &newprice);
    int found = 0;
    int currentId, currentQuantity, currentPrice, currentpos=-1;
    char currentName[50];
    while (fscanf(inventory, "%d,%49[^,],%d,%d", &currentId, currentName, &currentQuantity, &currentPrice) == 4) {
        if (currentId == id) {
            fseek(inventory, (currentpos+1), SEEK_SET);
            fprintf(inventory, "%d,%s,%d,%d", currentId, currentName, newqty, newprice);
            printf("Previous Values: \n");
            printf("%d, %s, %d, %d\n", id, currentName, currentQuantity, currentPrice);
            printf("Updated Values: \n");
            printf("%d, %s, %d, %d\n", currentId, currentName, newqty, newprice);
            rewind(inventory);
            found = 1;
            break;
        }
        currentpos=ftell(inventory);
    }
    if(found==0){printf("Item ID not found !!!");}
    fclose(inventory);
    return 1;
}