Sorting in C

ascii-sort.c

// sorting alphabet
// reference: https://stackoverflow.com/a/64693036/22382954

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

int main(void)
{
	srand(time(NULL));

	char ALLOWED[] = "qwertyuiopasdfghjklzxcvbnm";
	char random[26+1];
	random[26] = '\0';
	int i = 0;
	int c = 0;
	int nbAllowed = sizeof(ALLOWED)-1;

	for(int i = 0;i<26;i++) {
		c = rand() % nbAllowed;
		random[i] = ALLOWED[c];
	}
	printf("unsorted ver 1: %s\n", random);
	// OR just re-order/swap instead of generate the string randomly.
	int shuffle = 50;
	for (int j = 0;j < shuffle;j++) {
		int c = rand() % nbAllowed;
		for(int i = 0;i < 26-1;i++) {
			if (i != c) {
				char temp = ALLOWED[i];
				ALLOWED[i] = ALLOWED[c];
				ALLOWED[c] = temp;
			}

		}
	}
	printf("unsorted ver 2: %s\n", ALLOWED);

	puts("\nsorting...");
	int swapped;
	do {
		swapped = 0;
		for(i = 0;i < 26-1;i++) {
			if (random[i] > random[i+1]) {
				char temp = random[i];
				random[i] = random[i+1];
				random[i+1] = temp;
				swapped = 1;
			}
		}
	} while(swapped);
	printf("\nsorted ver 1: %s\n", random);
	
	do {
		swapped = 0;
		for(int i = 0;i < 26-1;i++) {
			if (ALLOWED[i] > ALLOWED[i+1]) {
				char temp = ALLOWED[i];
				ALLOWED[i] = ALLOWED[i+1];
				ALLOWED[i+1] = temp;
				swapped = 1;
			}
		}
	} while(swapped);
	printf("sorted ver 2: %s\n", ALLOWED);

	return 0;
}

bubble-sort.c

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

#define LENGTH 10

int main(void)
{
	unsigned int array[LENGTH];

	puts("unsorted random number");
	for (char i = 0;i < LENGTH;i++) {
		array[i] = (int)random();
		printf("%d\n", array[i]);
	}

	puts("sorting...");
	char swapped;
	do {
		swapped = 0;
		for (char i = 0;i < LENGTH-1;i++) {
			if (array[i] > array[i+1]) {
				unsigned int temporary = array[i];
				array[i] = array[i+1];
				array[i+1] = temporary;
				swapped = 1;
			}
		}
	} while (swapped);

	puts("sorted random number - ASCENDING");
	for (char i = 0;i < LENGTH;i++) {
		printf("%d\n", array[i]);
	}

	puts("sorting...");
	do {
		swapped = 0;
		for (char i = 0;i < LENGTH-1;i++) {
			if (array[i] < array[i+1]) {
				unsigned int temporary = array[i];
				array[i] = array[i+1];
				array[i+1] = temporary;
				swapped = 1;
			}
		}
	} while (swapped);

	puts("sorted random number - DESCENDING");
	for (char i = 0;i < LENGTH;i++) {
		printf("%d\n", array[i]);
	}

	return 0;
}