Testing input in an Array - arrays

Question

I'm practicing coding with arrays and I got a problem trying to test the input from the user.
This code lets the user input a binary sequence and do different operations with it.
I´ve accomplished most of it, my problem is that I cant find a way to limit the input of the user.
He should not be able to input more than 8 Bits and the input must only be 1s and 0s. I can imagine that I could use a for loop for this testing but I cant find a way to implement it so that it works properly.
I would be very thankful if someone could help me further.
Thanks in advance.
This is the code that I wrote:
#include <stdio.h>
#include <windows.h>
void bitCheck(int byte[], int position);
void bitSet(int byte[], int position);
void bitDelete(int byte[], int position);
void bitNegation(int byte[], int position);
int main( void )
{
int byte[7];
int position;
int selection = 0;
char c, i;
printf("%s\n======================\n\n", "Binary Operations");
printf("Byte in an 8-Bit sequence: ");
//My problem is in the code section below:
while (scanf("%1d%1d%1d%1d%1d%1d%1d%1d", &byte[7],&byte[6],&byte[5],&byte[4],&byte[3],&byte[2],&byte[1],&byte[0]) != 8 || byte[] != 0 || byte[] != 1){
printf("\nWrong input. Please write a valid 8-Bit sequence: ");
fflush(stdin);
}
while (selection!=5){
printf("\nAt which bit-position should the operation be made (7...0)?: ");
while (scanf("%d", &position) != 1 || position < 0 || position > 7){
printf("\nWrong input. Please write a valid position: ");
fflush(stdin);
}
printf("\n1: Bit check\n2: Bit set\n3: Bit delete\n4: Bit negation\n5: End\n\n");
while (scanf("%d", &selection) != 1 || selection < 1 || selection > 5){
printf("Wrong input. Please write a valid option: ");
fflush(stdin);
}
switch(selection){
case 1: bitCheck(byte, position);
break;
case 2: bitSet(byte, position);
break;
case 3: bitDelete(byte, position);
break;
case 4: bitNegation(byte, position);
break;
case 5: return 0;
}
}
getchar();
}
//Sorry for the german language in the code below, i think this code is not relevant for my question, but I still wanted to post it
void bitCheck (int byte[], int position){
if(byte[position]==1)
{
printf("\nDas Bit an der Position %d ist gesetzt.\n", position);
}
else if(byte[position]==0)
{
printf("\nDas Bit an der Position %d ist nicht gesetzt.\n",position);
}
}
void bitSet(int byte[], int position)
{
if(byte[position]==1)
{
byte[position]=0;
printf("\nNach der Bitoperation ergibt sich folgendes Bitmuster für das Byte: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
else if(byte[position]==0)
{
byte[position]=1;
printf("\nNach der Bitoperation ergibt sich folgendes Bitmuster für das Byte: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
}
void bitDelete(int byte[], int position)
{
if (byte[position]==1)
{
byte[position]=0;
printf("\nNach der Bitoperation ergibt sich folgendes Bitmuster für das Byte: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
else if (byte[position]==0)
{
printf("\nDas Bit ist schon auf 0 gesetzt!\n");
printf("\nDas Byte hat selbes Bitmuster wie davor: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
}
void bitNegation (int byte[], int position)
{
if (byte[position]==1)
{
byte[position]= 0;
printf("\nNach der Bitoperation ergibt sich folgendes Bitmuster für das Byte: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
else if (byte[position]==0)
{
byte[position]=1;
printf("\nNach der Bitoperation ergibt sich folgendes Bitmuster für das Byte: %d%d%d%d%d%d%d%d\n",byte[7],byte[6],byte[5],byte[4],byte[3],byte[2],byte[1],byte[0]);
}
}