Modify the original inventory.c program that we wrote in class by making inventory and num parts local to the main function.

 Modify the original inventory.c program that we wrote in class by making inventory and num parts local to the main function.

Here is the solution given below:

After modifing the original inventory.c program:

#include <stdio.h>

#define NAME_LEN 25

#define MAX_PARTS 100

struct part {

  int number;

  char name[NAME_LEN+1];

  int on_hand;

} inventory[MAX_PARTS];

int num_parts = 0;   /* number of parts currently stored */

int find_part(int number);

void insert(void);

void search(void);

void update(void);

void print(void);

int main(void)

{

  char code;

  for (;;) {

    printf("Enter operation code: ");

    scanf(" %c", &code);

    while (getchar() != '\n')   /* skips to end of line */

      ;

    switch (code) {

      case 'i': insert();

                break;

      case 's': search();

                break;

      case 'u': update();

                break;

      case 'p': print();

                break;

      case 'q': return 0;

      default:  printf("Illegal code\n");

    }

    printf("\n");

  }

}

int find_part(int number)

{

  int i;

  for (i = 0; i < num_parts; i++)

    if (inventory[i].number == number)

      return i;

  return -1;

}

void insert(void)

{

  int part_number;

  if (num_parts == MAX_PARTS) {

    printf("Database is full; can't add more parts.\n");

    return;

  }

  printf("Enter part number: ");

  scanf("%d", &part_number);

  if (find_part(part_number) >= 0) {

    printf("Part already exists.\n");

    return;

  }

  inventory[num_parts].number = part_number;

  printf("Enter part name: ");

  read_line(inventory[num_parts].name, NAME_LEN);

  printf("Enter quantity on hand: ");

  scanf("%d", &inventory[num_parts].on_hand);

  num_parts++;

}

void search(void)

{

  int i, number;

  printf("Enter part number: ");

  scanf("%d", &number);

  i = find_part(number);

  if (i >= 0) {

    printf("Part name: %s\n", inventory[i].name);

    printf("Quantity on hand: %d\n", inventory[i].on_hand);

  } else

    printf("Part not found.\n");

}

void update(void)

{

  int i, number, change;

  printf("Enter part number: ");

  scanf("%d", &number);

  i = find_part(number);

  if (i >= 0) {

    printf("Enter change in quantity on hand: ");

    scanf("%d", &change);

    inventory[i].on_hand += change;

  } else

    printf("Part not found.\n");

}

void print(void)

{

  int i;

  printf("Part Number   Part Name                  "

         "Quantity on Hand\n");

  for (i = 0; i < num_parts; i++)

    printf("%7d       %-25s%11d\n", inventory[i].number,

           inventory[i].name, inventory[i].on_hand);

}