Something

char* FileAccessor::decToBin(int d) {
    char bin[] = {'0', '0', '0', '0', '0', '0', '0', '0', '\0'};
    
    int rest;
    int div = d;
    
    for(int i = 7; i >= 0; i--) {
        rest = div % 2;
        div = div / 2;
                
        if(rest == 0) {
            bin[i] = '0';
        }
        else {
            bin[i] = '1';
        }
    }
    
    return bin;
    
}