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Lotto.c

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

void not_duplicate_rand(int data[], int size);
void insert_sort(int data[], int size);
void delay(clock_t n);

enum {
	MAX = 45,
	LIMIT = 6,
	TRUE = 1,
	FALSE = 0
};

void main() {
	int i, repeat;
	int lotto[LIMIT];

	for (repeat = 0; repeat < 10; repeat++) {
		not_duplicate_rand(lotto, LIMIT);

		for (i = 0; i < LIMIT; i++) {
			printf("%2d ", lotto[i]);
		}

		printf("\n");
		delay(1000);
	}
}

void not_duplicate_rand(int data[], int size) {
	int i, sw, temp;
	int index = 0;
	
	srand((unsigned int)time(NULL));

	while (index < size) {
		temp = rand() % MAX + 1;
		sw = FALSE;

		for (i = 0; i <= index - 1; i++) {
			if (data[i] == temp) {
				sw = TRUE;
				break;
			}
		}
		
		if (sw == FALSE) {
			data[index] = temp;
			index += 1;
		}
	}

	insert_sort(data, size);
}

void insert_sort(int data[], int size) {
	int i, j;
	int ins_data;

	for (i = 1; i < size; i++) {
		ins_data = data[i];

		for (j = i - 1; j >= 0; j--) {
			if (data[j] > ins_data)
				data[j + 1] = data[j];
			else
				break;
		}

		data[j + 1] = ins_data;
	}
}

void delay(clock_t n) {
	clock_t start = clock();
	while (clock() - start < n);
}