dasdas

#include <stdbool.h>
#include <stdio.h>
#include <time.h>
#include <math.h>
#include <stdint.h>

uint8_t getMask(uint8_t index, uint8_t length)
{
	uint8_t Bits = 00000000;
	if(length!=0)
	{
	for (int i = length; i > 0; i--)
	{
		Bits |= 1 << index;
		index--;
	}
	}
	return Bits;
}

void displayBits(uint8_t value)
{
	unsigned int i; // loop counter
					// define mask and left shift 31 bits
	const unsigned int SHIFT = 8 * sizeof(value) - 1;
	const unsigned int MASK = 1 << SHIFT;

	printf("0X%1.2X (%3u = ", value,value);

	// loop through bits
	for (i = 1; i <= SHIFT + 1; ++i) {
		putchar(value & MASK ? '1' : '0');
		value <<= 1; // shift value left by 1

		if (i % 8 == 0) { // output space after 8 bits
			putchar(' ');
		} // end if
	} // end for

	puts(")");
} // end function displayBits

void bitnInvert(uint8_t* bytePtr, uint8_t index, uint8_t length)
{
	uint8_t value = getMask(index, length) &~*bytePtr;
	displayBits(value);
}

void bitnSet(uint8_t* bytePtr, uint8_t index, uint8_t length)
{
	uint8_t value = getMask(index, length) &~*bytePtr;
	displayBits(value);
}

void bitnClear(uint8_t* bytePtr, uint8_t index, uint8_t length)
{
	uint8_t value = getMask(index, length) &~*bytePtr;
	displayBits(value);
}


int main(void)
{
	srand(time(NULL));
	int Length = 0;
	int Index = 0;
	printf("Erzeugung einer Bitmaske (8 Bit)\n Position der ersten '1' eingeben (0-7) : ");
	scanf_s("%d", &Index);
	printf("Anzahl der '1' eingeben (0-8) : ");
	scanf_s("%d", &Length);
	printf("\n");
	printf("Bitmaske: ",getMask(Index, Length));
	displayBits(getMask(Index, Length));
	printf("\n");

	for (int i = 3; i > 0; i--)
	{
		int number = (0 + rand() % 255);
		printf("Byte ");
		displayBits(number);
		printf("Pos. %d, Laenge %d inventiert: ", Index, Length);
		bitnInvert(00000000,Index,Length);
		printf("\n");
	}
	printf("\n");
}