Arrange Marks (Descending Order)

Given a user defined array of marks of students the task is to sort them in descending order using pointers.

Example:

Consider an array of size 5 containing marks of 5 students.

7090856575

Arranged array.

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C
#include <stdio.h>
int main()
{
    int n=0,temp=0;
    printf ("Enter the size of the array: ");
    scanf ("%d",&n);
    int marks[n];
    int *p=marks;
    printf ("Enter the marks of the students:-\n");
    for (int i=0;i<n;i++)
    {
        scanf("%d",p);
        p++;
    }
    for(int i=0;i<n-1;i++)
    {
        p=marks;
        for(int j=0;j<n-1-i;j++)
        {
            if(*p<*(p+1))
            {
                temp=*p;
                *p=*(p+1);
                *(p+1)=temp;
            } 
            p++;
        }
    }
    p=marks;
    printf("Marks\t\tRank\n");
    for(int i=0;i<n;i++)
    {
        printf("%d\t\t%d\n",*p,(i+1));
        p++;
    }
    return 0;
}
C