I'm having some trouble converting decimal number into binary numbers but no matter what number i type in i get the same output

0 (base-10) is equivalent to 1 (base-2)!

0 (base-10) is equivalent to 0 (base-2)!

Here's my code :

#include

int main(){

int i;

int num;

int binary[i];

printf("Starting the CPSC 1011 Decimal to Binary Converter ");

printf("Please enter a postive whole number(or EOF to quit):" );

scanf("%d", &num);

if(num<=0){

printf("Sorry, that was not a postive whole number.");

printf(" ");

}

else{

while(num>0){

binary[i]=num%2;

num=num/2;

i++;

}

for(int j=i-1; j>=0; j--){

printf("%d (base-10) is equivalent to %d (base-2)! ", num, binary[j]);

}

}

return(0);

}

This is the output I'm trying to get:

Starting the CPSC 1011 Decimal to Binary Converter!

Please enter a positive whole number (or EOF to quit): 42

42 (base-10) is equivalent to 101010 (base-2)!

Please enter a positive whole number (or EOF to quit): -2

Sorry, that was not a positive whole number.

Please enter a positive whole number (or EOF to quit): 1.1

Sorry, that was not a positive whole number.

Please enter a positive whole number (or EOF to quit): 11.0

11 (base-10) is equivalent to 1011 (base-2)!

Please enter a positive whole number (or EOF to quit):

Thank you for using the CPSC 1011 Decimal to Binary Generator. Goodbye!