Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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## Question 16

Write the C function that will add a value to the end of the array field `arr` into the structure for the dynamic array that was already defined and initialized.

If the dynamic array is full, this function should properly grow the array to twice its current size using the `malloc()` library function. The function's parameter must match the call shown below. The structure definition for the dynamic array is also shown below.

```c
typedef struct dynArrStruct
{
    int* arr;        /* pointer to the dynamic array */
    int allocated;   /* amount of space currently allocated for the dynamic array */
    int inUse;       /* number of values currently stored in the dynamic array */
} dynArr;

void main()
{
    dynArr *a1;

    addValue( a1, 5 ); /* write this function to add the value given in the second parameter */
}
```

This code segment describes a challenge related to dynamic memory allocation in C. It provides a `typedef` struct for a dynamic array, which includes a pointer to the array, the amount of allocated space, and the number of values currently stored. The objective is to implement a function that adds a new value to this dynamic array. If the array is full, it should expand by doubling its size using the `malloc()` function.
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Transcribed Image Text:## Question 16 Write the C function that will add a value to the end of the array field `arr` into the structure for the dynamic array that was already defined and initialized. If the dynamic array is full, this function should properly grow the array to twice its current size using the `malloc()` library function. The function's parameter must match the call shown below. The structure definition for the dynamic array is also shown below. ```c typedef struct dynArrStruct { int* arr; /* pointer to the dynamic array */ int allocated; /* amount of space currently allocated for the dynamic array */ int inUse; /* number of values currently stored in the dynamic array */ } dynArr; void main() { dynArr *a1; addValue( a1, 5 ); /* write this function to add the value given in the second parameter */ } ``` This code segment describes a challenge related to dynamic memory allocation in C. It provides a `typedef` struct for a dynamic array, which includes a pointer to the array, the amount of allocated space, and the number of values currently stored. The objective is to implement a function that adds a new value to this dynamic array. If the array is full, it should expand by doubling its size using the `malloc()` function.
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