Sure, here is a step-by-step guide on how Disha can achieve this in C programming language:

1. First, she needs to allocate memory for both arrays using `malloc`. The size of the memory to be allocated should be the size of the array times the size of an integer.

```c
int *array1 = (int*)malloc(N * sizeof(int));
int *array2 = (int*)malloc(M * sizeof(int));
```

2. Next, she needs to fill the arrays with the elements. She can use a for loop to iterate through the array and assign the elements.

```c
for(int i = 0; i

Question

Sure, here is a step-by-step guide on how Disha can achieve this in C programming language:

1. First, she needs to allocate memory for both arrays using `malloc`. The size of the memory to be allocated should be the size of the array times the size of an integer.

```c
int *array1 = (int*)malloc(N * sizeof(int));
int *array2 = (int*)malloc(M * sizeof(int));
```

2. Next, she needs to fill the arrays with the elements. She can use a for loop to iterate through the array and assign the elements.

```c
for(int i = 0; i < N; i++) {
    scanf("%d", &array1[i]);
}

for(int i = 0; i < M; i++) {
    scanf("%d", &array2[i]);
}
```

3. Now, she needs to delete the elements from the first array that are present in the second array. She can do this by creating a new array and copying over only the elements that are not in the second array.

```c
int *newArray = (int*)malloc(N * sizeof(int));
int newSize = 0;

for(int i = 0; i < N; i++) {
    int found = 0;
    for(int j = 0; j < M; j++) {
        if(array1[i] == array2[j]) {
            found = 1;
            break;
        }
    }
    if(!found) {
        newArray[newSize++] = array1[i];
    }
}
```

4. Finally, she needs to resize the first array using `realloc`. The new size should be the number of elements in the new array.

```c
array1 = (int*)realloc(array1, newSize * sizeof(int));
for(int i = 0; i < newSize; i++) {
    array1[i] = newArray[i];
}
```

5. Don't forget to free the memory allocated for the arrays when they are no longer needed.

```c
free(array1);
free(array2);
free(newArray);
```

This is a simple way to delete elements from the first array that are present in the second array using dynamic memory allocation in C.

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