Write a C program to merge two array and sort element in desending order.

merge_and_sorted_array.c

// Write a c program to sort a array element in Desending order
#include <stdio.h>

int main() {
    
    int i, j, temp, n1, n2, n3;
    int arr1[100000], arr2[100000], arr3[200000];
    
    printf("Please enter the size of first array: ");
    scanf("%d", &n1);
    
    printf("Input %d elements in the array :\n", n1);
    
    for(i =0; i < n1; i++) {
        printf("Element %d - ", i);
        scanf("%d", &arr1[i]);
    }
    
    printf("Please enter the size of second array: ");
    scanf("%d", &n2);
    printf("Input %d elements in the array :\n", n2);
    
    for(int i =0; i < n2; i++) {
        printf("Element %d - ", i);
        scanf("%d", &arr2[i]);
    }
    
    n3 = n1 + n2;
    
    for(i=0; i<n1; i++) {
        arr3[i] = arr1[i];
    }
    
    for(i=0; i<n2; i++) {
        arr3[i + n1] = arr2[i];
    }
    
    printf("The merged array: ");
    for(i =0; i<n3; i++) {
        printf("%d ", arr3[i]);
    }
    
    // sorting an array...
    for(i=0; i<(n3 -1); i++) {
        for(int j=i+1; j<n3; j++) {
            if(arr3[i] < arr3[j]) {
                temp = arr3[i];
                arr3[i] = arr3[j];
                arr3[j] = temp;
            }
        }
    }
    
    printf("\nAfter sorting: ");
    for(i =0; i<n3; i++) {
        printf("%d ", arr3[i]);
    }
    
    return 0;
}