> For the complete documentation index, see [llms.txt](https://42-guide.gitbook.io/42-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://42-guide.gitbook.io/42-guide/piscine-life/c01/ft_ultimate_div_mod.md).

# ft\_ultimate\_div\_mod

####

**Objective:**

Create a function that performs division and modulus operations, modifying the values of two integers directly via pointers.

**Turn-in Requirements:**

* **Directory**: `ex04/`
* **File**: `ft_ultimate_div_mod.c`
* **Allowed Functions**: None

**Prototype:**

```c
ft_ultimate_div_mod(int *a, int *b);
```

**Implementation:**

Here’s how you can implement the function:

```c
// File: ft_ultimate_div_mod.c
#include <unistd.h> // Optional, not needed for this task but can be standard practice for headers

void ft_ultimate_div_mod(int *a, int *b)
{
    if (*b != 0) // Ensure the divisor is not zero
    {
        int temp_div = *a / *b; // Calculate the quotient
        int temp_mod = *a % *b; // Calculate the remainder

        *a = temp_div; // Store the quotient in *a
        *b = temp_mod; // Store the remainder in *b
    }
}
```

**Explanation:**

1. **Input Pointers**:
   * The function accepts two pointers: `*a` and `*b`.
   * These pointers refer to integers in memory.
2. **Operations**:
   * The function calculates the quotient (`*a / *b`) and stores it back in `*a`.
   * It calculates the remainder (`*a % *b`) and stores it back in `*b`.
3. **Error Handling**:
   * If the value of `*b` is `0`, the function does nothing to prevent division by zero.

**Example Usage:**

```c
#include <stdio.h>

void ft_ultimate_div_mod(int *a, int *b);

int main()
{
    int a = 42;
    int b = 5;

    printf("Before: a = %d, b = %d\n", a, b);
    ft_ultimate_div_mod(&a, &b); // Pass addresses of a and b
    printf("After: a (quotient) = %d, b (remainder) = %d\n", a, b);

    return 0;
}
```

**Output:**

```makefile
Before: a = 42, b = 5
After: a (quotient) = 8, b (remainder) = 2
```

**Notes:**

* Ensure the pointers are valid and not `NULL` when calling the function.
* You can remove if condition from function.
* The input values (`*a` and `*b`) are both modified in place, which showcases how pointers can be used to directly alter variables.


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