void sort4(int* a, int* b, int* c, int* d) {

	int taul [4];
	taul [0] = *a;
	taul [1] = *b;
	taul [2] = *c;
	taul [3] = *d;
	int x = 4;

	if (d == NULL) {
		x = 3;
	}
	if (c == NULL) {
		x = 2;
	}
	if (b == NULL) {
		x = 1;
	}


	for (int i=0; i < x - 1; i++) {
			int j = i + 1;
			while (j < x) {
				if (taul[i] > taul[j]){
					int t = taul [i];
					taul [i] = taul [j];
					taul [j] = t;
					j = i + 1;
				}
				j++;
			}
	}

	*a = taul[0];
	*b = taul[1];
	*c = taul[2];
	*d = taul[3];