# Answer to Question #39660 in C++ for Theodore

Question #39660
Hello, I am studying C++ and fairly new at the language, I am trying to get a better understanding on how the following code works:
#define MAX 1000
int main(){
char binaryNumber[MAX],hexaDecimal[MAX];
int temp;
long int i=0,j=0;
cout &lt;&lt; &quot;Enter any number any binary number: &quot;;
cin &gt;&gt; binaryNumber;
while(binaryNumber[i])
{
binaryNumber[i] = static_cast&lt;int&gt;(binaryNumber[i]) -48;
++i;
}
--i;
while(i-2&gt;=0){
temp = binaryNumber[i-3] * 8 + binaryNumber[i-2] * 4 + binaryNumber[i-1] * 2 + binaryNumber[i] ;
if(temp &gt; 9)
hexaDecimal[j++] = temp + 55;
else
hexaDecimal[j++] = temp + 48;
i=i-4;
}
if(i ==1)
hexaDecimal[j] = binaryNumber[i-1] * 2 + binaryNumber[i] + 48 ;
else if(i==0)
hexaDecimal[j] = binaryNumber[i] + 48 ;
else
--j;
cout &lt;&lt; &quot;Equivalent hexadecimal value: &quot;;
while(j&gt;=0){
cout &lt;&lt; hexaDecimal[j--];
}
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