viraatmaurya’s gists

viraatmaurya / Linear search Implementation in C using Pointers.

Last active July 21, 2022 17:14

Linear search for integers using pointer.

	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	int compare(void a, void b)
	{
	int * ap = a;
	int * bp = b;
	return ap - bp;
	}
	void * lsearch(void key, void base, int n, int elemsize)

viraatmaurya / Linux "wc" command implementation in C language.

Created July 21, 2022 17:22

Linux "wc" command implementation in C language.(Noobish)

	/* compile using "gcc -o wc <file.c>" and work just like wc only tested on asci text file*/

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

	FILE * getFileBuffer(char * file_name);
	int lineCount(char * filepath);
	int wordCount(char * filepath);

Created July 22, 2022 14:10

Numbers to Indian currency text conversion in C Language Under 30 Lines(Noobish)

	*/ Usage : <a.uot> <Number> ">
	#include<stdio.h>
	#include<stdlib.h>
	#include<string.h>
	int main(int argc, char **argv){
	int num = atoi(argv[1]);
	printf("%d : ", num);

	char * oneToText[] = {"", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen","Nineteen" };
	char * tenToText[] = {"", "", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};

viraatmaurya / Numbers to Indian currency text conversion in C Language detailed

Last active August 4, 2022 09:38

Numbers to Indian currency text conversion in C Language detailed

	#include<stdio.h>
	#include<stdlib.h>
	#include<string.h>
	int main(int argc, char **argv)
	{
	int num = atoi(argv[1]);

	char * oneToText[] = {"", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen","Nineteen" };
	char * tenToText[] = {"", "", "Twenty", "Thirty", "Fourty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"};
	char * moreThenHundredToText[] = {"", "Hundred", "Thousand", "Lakhs", "Crore"};

viraatmaurya / Find the nth Reverse Number (Extreme) in C language

Created July 29, 2022 11:31

Find the nth Reverse Number (Extreme) in C language

	unsigned long long int find_reverse_number(unsigned long long int nth) {

	unsigned long long int result = 0, count = 0;
	for ( unsigned long long int i = 0; i <= 10000000000; i++)
	{
	unsigned long long int reversed = 0, remainder;
	unsigned long long int n = i;
	while (n != 0)
	{
	remainder = n % 10;

viraatmaurya / Next smaller number with the same digits in C language - 4 kyu

Created August 1, 2022 10:55

Next smaller number with the same digits in C language - 4 kyu

	/Doesn't work on 970/
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <assert.h>

	unsigned long long int next_smaller_number(unsigned long long int number);
	int main(int argc, char const *argv[])
	{
	unsigned long long int result = 0;

viraatmaurya / Large Factorials (code wars) in C language.

Created August 1, 2022 12:43

Large Factorials (code wars) in C language.

	include<stdio.h>
	#include <stdlib.h>
	#include <string.h>
	int main(int argc, char const *argv[])
	{
	factorial(5);
	return 0;
	}

	char *factorial(int n)

viraatmaurya / Fibonacci Sequence using Recursion and Memoization in C language.

Created August 2, 2022 15:35

Fibonacci Sequence using Recursion and Memoization in C language.

	/* Program will break after sum reachs to int holding limit which is around 4 billion*/

	/* Usage : gcc -o fib <file.c> --std=c99
	./fib <number>
	*/

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

viraatmaurya / Counting Coin Change Sum problem using Momoization in C language

Last active August 6, 2022 06:08

Counting Coin Change Sum problem using Recursion and Momoization in C language

	#include <stdlib.h>
	#include <stdio.h>
	#include <string.h>
	#include <stdbool.h>
	#include <assert.h>
	int *cache(int n);
	int canSum(int target, int numbers[], int len, int *memo);
	int main(int argc, char const *argv[])
	{
	assert(canSum(11, (int[]){1, 4}, 2, cache(11)));

viraatmaurya / Compare function for qsort() in C language.

Last active August 7, 2022 12:00

Compare function for qsort() in C language. ( Both Ascending and descending order output)

	/* IF YOU WANT TO SORT IN DESCENDING ORDER */
	int cmp(const void a, const void b)
	{
	const int A = a, B = b;
	/* a>b => -1, a<b => 1, a==b => 0 */
	return (A < B) - (A > B);
	}

	/* FOR ASCENDING ORDER SORT*/
	int cmp(const void a, const void b)

	/* IF YOU WANT TO SORT IN DESCENDING ORDER */
	int cmp(const void a, const void b)
	{
	const int A = a, B = b;
	/* a>b => -1, a<b => 1, a==b => 0 */
	return (A < B) - (A > B);
	}

	/* FOR ASCENDING ORDER SORT*/
	int cmp(const void a, const void b)

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