ece368/hw_practice.c

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

typedef int Info_t;
typedef struct node { 
	Info_t Info; 
	struct node *next;
} Node;
typedef struct head { 
	Node first; 
	Node last;
} Head;

void permute (int i, int n, char str[]);

int main ( int argc , char ** argv ){
	int n = 50;
	int * sequence = calloc(n, sizeof(int));
	sequence[0] = n / 1.3;
	printf("%d ", sequence[0]);
	int i = 1;
	while(sequence[i - 1] > 1){
		sequence[i] = sequence[i - 1] / 1.3;
		if(sequence[i] == 9 || sequence[i] == 10){
			sequence[i] = 11;
		}
		printf("%d ", sequence[i]);
		i++;
	}
	return EXIT_SUCCESS;
}

void swap (char *x, char *y){
	char temp;
	temp = *x;
	*x = *y;
	*y = temp;
}

void permute (int i, int n, char str[]){
	int j;
	int k;
	if (i == n){
		printf("%s\n", str);
	} else {
		for (j = i; j <= n; j++){
         	swap(&str[i], &str[j]);          
         	permute(i + 1, n, str);
          	swap(&str[i], &str[j]);
		}
	}
}