#include <stdio.h>

 int cmp(int x, int y){ // compare x and y

	 return x > y; // 1 if x > y, 0 otherwise
 }

 void swap(int *x, int *y){
	 int tmp = *x;

 	*x = *y;
 	*y = tmp;
 }

 int main(void) {
 	int a[] = {3, 1, 4, 1, 5, 9, 2, 6, 5}; // array to be sorted
 	size_t n = sizeof a / sizeof a[0]; // number of elements

 		for (size_t i = 0; i < n - 1; ++i) {
 			for (size_t j = 0; j < n - 1 - i; ++j) {
 				if (cmp(a[j],a[j+1])) {
 					swap(&a[j],&a[j+1]);
				 }
 			}
 		}

 		for (size_t i = 0; i < n; ++i) {
 			printf("%d ", a[i]);
 		}
 		printf("\n")	;

		return 0;
 }