Không tìm được lỗi trong 1 đoạn code đơn giản

Source code: http://codepad.org/SIcID3Q3

int main()
{
MENU:
	std::string Choose;
	std::cout << "
Your choose(1 -> 6): ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, Choose);
	if (Choose != "1" && Choose != "2" && Choose != "3" && Choose != "4" && Choose != "5" && Choose != "6")
	{
		std::cout << "
Lua chon cua ban khong hop le
";
		Sleep(1500);
		goto MENU;
	}
	if (Choose == "1")
	{
		std::cout << "a";
		goto STT1;
	}
	else if (Choose == "2")
	{
		std::cout << "a";
		goto STT2;
	}
	else if (Choose == "3")
	{
		std::cout << "a";
		goto STT3;
	}
	else if (Choose == "4")
	{
		std::cout << "a";
		goto STT4;
	}
	else if (Choose == "5")
	{
		std::cout << "a";
		goto STT5;
	}
	else if (Choose == "6")
		exit(0);
STT1:
	std::string s1, s2;
	std::cout << "
Nhap so thu 1: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s1);
	std::cout << "
Nhap so thu 2: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s2);
	std::string s3 = s1 + s2;
	std::cout << "
Ket qua tong = " << s3 << std::endl;
	std::string Choose2;
	std::cout << "
Ban muon:
";
	std::cout << "
1. Return Menu.
";
	std::cout << "
2. Continue.
";
	std::cout << "
3. Exit Program.
";
	if (Choose2 == "1")
	{
		goto MENU;
	}
	else if (Choose2 == "2")
	{
		goto STT1;
	}
	else if (Choose2 == "3")
		exit(0);
STT2:
	std::string s4, s5;
	std::cout << "
Nhap so thu 1: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s4);
	std::cout << "
Nhap so thu 2: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s5);
	std::string s6 = s4 + s5;
	std::cout << "
Ket qua hieu = " << s6 << std::endl;
	std::string Choose3;
	std::cout << "
Ban muon:
";
	std::cout << "
1. Return Menu.
";
	std::cout << "
2. Continue.
";
	std::cout << "
3. Exit Program.
";
	if (Choose3 == "1")
	{
		goto MENU;
	}
	else if (Choose3 == "2")
	{
		goto STT2;
	}
	else if (Choose3 == "3")
		exit(0);
STT3:
	std::string s7, s8;
	std::cout << "
Nhap so thu 1: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s7);
	std::cout << "
Nhap so thu 2: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s8);
	std::string s9 = s7 + s8;
	std::cout << "
Ket qua tich = " << s9 << std::endl;
	std::string Choose4;
	std::cout << "
Ban muon:
";
	std::cout << "
1. Return Menu.
";
	std::cout << "
2. Continue.
";
	std::cout << "
3. Exit Program.
";
	if (Choose4 == "1")
	{
		goto MENU;
	}
	else if (Choose4 == "2")
	{
		goto STT3;
	}
	else if (Choose4 == "3")
		exit(0);
STT4:
	std::string s10, s11;
	std::cout << "
Nhap so thu 1: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s10);
	std::cout << "
Nhap so thu 2: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s11);
	std::string s12 = s10 + s11;
	std::cout << "
Ket qua thuong = " << s12 << std::endl;
	std::string Choose5;
	std::cout << "
Ban muon:
";
	std::cout << "
1. Return Menu.
";
	std::cout << "
2. Continue.
";
	std::cout << "
3. Exit Program.
";
	if (Choose5 == "1")
	{
		goto MENU;
	}
	else if (Choose5 == "2")
	{
		goto STT4;
	}
	else if (Choose5 == "3")
		exit(0);
STT5:
	std::string s13;
	std::cout << "
Nhap vao thua so: ";
	while (getchar() != '
' && getchar() != EOF) {}
	getline(std::cin, s13);
	std::string s14 = s13;
	std::cout << "
Ket qua giai thua = " << s14 << std::endl;
	std::string Choose6;
	std::cout << "
Ban muon:
";
	std::cout << "
1. Return Menu.
";
	std::cout << "
2. Continue.
";
	std::cout << "
3. Exit Program.
";
	if (Choose6 == "1")
	{
		goto MENU;
	}
	else if (Choose6 == "2")
	{
		goto STT5;
	}
	else if (Choose6 == "3")
		exit(0);
	system("pause");
	return 0;
}

There are 40 errors :

Pasted image1366x768 121 KB

Need helps from eveybody, thank you so much

P/S: Lúc giúp nói Tiếng Việt chứ đừng nói tiếng Anh nha, mình không hiểu gì đâu =)) Còn ở trên mình dùng Tiếng Anh để thay đổi không khí xíu thôi