void c_allperms(int *a, const int *nin, const int *fn){
const int n = *nin;
int i;
for(i=0 ; i<n ;i++){
a[i] = i+1;
}
for(i=1 ; i < (*fn) ; i++){
for(int j=0 ; j<n ; j++){
a[i*n + j] = a[(i-1)*n+j];
}
nextperm (a+i*n, n);
}
}
int main()
{
int i, count;
count = 0;
for (i = 0; i < N; i++) a[i] = N - i - 1;
do {
count++;
printf("%5d: ", count);
for (i = N - 1; i >= 0; i--) printf("%4d", a[i]);
printf("\n");
encode();
printf("%5d: ", count);
for (i = N - 1; i > 0; i--) printf("%4d", a[i]);
printf("\n");
decode();
printf("%5d: ", count);
for (i = N - 1; i >= 0; i--) printf("%4d", a[i]);
printf("\n\n");
} while (nextperm());
return EXIT_SUCCESS;
}
