std::string string1="123456789...."; // строка с миллионом цифр 

cout << "Constructing Big Intintegers."<< endl;

BigInt bigInt1(string1);
BigInteger bigInteger1 = stringToBigInteger(string1);

BigInt a("1");
BigInt b("2");
BigInt c = a +b;

#include "мояCUDA.h"
int main( int argc, char *argv[])
{
BigInt a("1");
BigInt b("2");
BigInt c = a + b;

cout << a<< "+" <<b <<" = " << c << endl;
}

for(int i=0 i<strlen(str);  i++
{
  array[i]=(char)str[i];
}

class BigInt {
public:
BigInt() { };
BigInt(const std::string&); // конструктор из строки
private:
std::vector<int> number;
};

BigInt candidate;
candidate=Parse("2^12345+1");
if((candidate%2) == 0 )
cout << "candidate is NOT prime number."<< endl;

class BigInt {
public:
    BigInt() { };
	BigInt(const std::string&);
	virtual ~BigInt()	{ };

	friend	std::ostream &operator<<(std::ostream&, BigInt&); 
	friend void BigInt::parseSubstring(const std::string& str, size_t start_pos, const size_t  block_size, const size_t block_num, std::vector<int>* x);
	size_t getLength() const { return number.size();}

	BigInt Parse(const std::string);
	enum Sign { negative = -1, zero = 0, positive = 1 };
private:
Sign sign;
std::vector <int> number;
};

D:\aProjects\TestBigInt\x64\Debug>TestBigInt.exe -amd
Accelerator : ATI Radeon HD 5800 Series
==================
Preparing string1 for BigInt1.
string1 size=1000000000 digits.
CPU: constructing BigInt1.
Exec time : 180 seconds.
==================