#include

#include

#include

int a[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

int b[5], rank[5];

bool used[10] = {false};

bool p_used[5] = {false};

void Permutation(int deep);

void main()

{

int i = 0, j = 0, k = 0, temp;

srand((unsigned)time(NULL));

for(i = 0; i

{

temp = rand()%9;

for(k = 0; k

{

if(a[k] == temp)

{

if(used[k] == false)

{

b[j++] = temp;

used[k] = true;

break;

}

else

{

i--;

break;

}

}

}

}

Permutation(0);

printf("\n");

}

void Permutation(int deep)

{

int i;

if(deep == 5)

{

printf("%d %d %d %d %d\n",b[rank[0]], b[rank[1]], b[rank[2]], b[rank[3]], b[rank[4]]);

}

for(i = 0; i

{

if(p_used[i] == true)

continue;

p_used[i] = true;

rank[deep] = i;

Permutation(deep + 1);

p_used[i] = false;

}

}