programming-examples/c/Search_Sorting/C Program to Implement the Alexander Bogomolny’s UnOrdered Permutation Algorithm for Elements From 1 to N.c

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2019-11-15 12:59:38 +01:00
#include <stdio.h>
void print(const int *v, const int size)
{
int i;
if (v != 0)
{
for ( i = 0; i < size; i++)
{
printf("%4d", v[i] );
}
printf("\n");
}
}
void alexanderbogomolyn(int *Value, int N, int k)
{
static level = -1;
int i;
level = level+1;
Value[k] = level;
if (level == N)
print(Value, N);
else
for (i = 0; i < N; i++)
if (Value[i] == 0)
alexanderbogomolyn(Value, N, i);
level = level-1;
Value[k] = 0;
}
int main()
{
int N = 4;
int i;
int Value[N];
for (i = 0; i < N; i++)
{
Value[i] = 0;
}
printf("\nPermutation using Alexander Bogomolyn's algorithm: ");
alexanderbogomolyn(Value, N, 0);
return 0;
}
/*
Permutation using Alexander Bogomolyns algorithm:
1 2 3 4
1 2 4 3
1 3 2 4
1 4 2 3
1 3 4 2
1 4 3 2
2 1 3 4
2 1 4 3
3 1 2 4
4 1 2 3
3 1 4 2
4 1 3 2
2 3 1 4
2 4 1 3
3 2 1 4
4 2 1 3
3 4 1 2
4 3 1 2
2 3 4 1
2 4 3 1
3 2 4 1
4 2 3 1
3 4 2 1
4 3 2 1