Problem:9.1

 Write a code using the insertion sort technique to sort numbers using descending orders.

Sample Input:

Enter total input: 5

Enter the numbers: 4 5 8 9 10

Sample Output:

Descending orders are: 10, 9, 8, 5, 4.

Soultion: 

#include <math.h>
#include <stdio.h>

void insertionSort(int arr[], int n)
{
    int i, key, j;
    for (i = 1; i < n; i++) {
        key = arr[i];
        j = i - 1;
        while (j >= 0 && arr[j] < key) {
            arr[j + 1] = arr[j];
            j = j - 1;
        }
        arr[j + 1] = key;
    }
}


void printArray(int arr[], int n)
{
    int i;
    for (i = 0; i < n; i++)
        printf("%d ", arr[i]);
    printf("\n");
}

int main()
{
    int n,x;
    printf("total input: ");
    scanf("%d",&n);
    int arr[n+1];
    for(int i=0;i<n;i++){
    scanf("%d",&x);
     arr[i] =  x;
    }

    insertionSort(arr, n);
    printArray(arr, n);

    return 0;
}

Output: