How do you find the intersection of two arrays in C?

How do you find the intersection of two arrays in C?

The program output is also shown below.

1. /*
2. * C Program to Find Union & Intersection of 2 Arrays.
3. #include
4. #define SIZE 5.
5. void get_value(int arr[]);
6. void print_value(int arr[], int n);
7. void function_sort(int arr[]);
8. int find_intersection(int array1[], int array2[], int intersection_array[]);

How do you find the intersection of two arrays?

Initialize intersection I as empty. Find smaller of m and n and sort the smaller array….Union:

1. Initialize union U as empty.
2. Copy all elements of the first array to U.
3. Do the following for every element x of the second array: If x is not present in the first array, then copy x to U.
4. Return U.

What if nums1’s size is small compared to nums2’s size which algorithm is better?

What if nums1’s size is small compared to nums2’s size? Which algorithm is better? Suppose lengths of two arrays are N and M , the time complexity of my solution is O(N+M) and the space complexity if O(N) considering the hash. So it’s better to use the smaller array to construct the counter hash.

What do you mean by external sorting?

External sorting is a class of sorting algorithms that can handle massive amounts of data. In the sorting phase, chunks of data small enough to fit in main memory are read, sorted, and written out to a temporary file. In the merge phase, the sorted subfiles are combined into a single larger file.

How do you find the intersection of two sets in C++?

std::set_intersection in C++ The intersection of two sets is formed only by the elements that are present in both sets. The elements copied by the function come always from the first range, in the same order. The elements in the both the ranges shall already be ordered.

Can we add two arrays in C?

In this method, we will directly add each and every element to the array. Then, start appending each and every element of the second array to the merged array. Here, the user first enters the size of the first array and its element, then the same for the second array. After merging, these two arrays display the result.