static void Main(string[] args)
{
for (int a = 1; a <= 4; a++)
{
for (int b = 1; b <= 4; b++)
{
for (int c = 1; c <= 4; c++)
{
for (int d = 1; d <= 4; d++)
{
if (a != b&&a!=c&&a!=d&&b!=c&&b!=d&&c!=d)
{
int i = a * 1000 + b * 100 + c * 10 + d;
Console.WriteLine(i);
}
}
}
} }
Console.ReadLine();
}
static void Main(string[] args)
{
int[] i = new int[4];
Console.WriteLine("Please enter the first number:");
i[0] = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the second number:");
i[1] = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the tirnd number:");
i[2] = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the forth number:");
i[3] = Convert.ToInt32(Console.ReadLine());
for (int m = 0; m < 4; m++)
{
for (int n = 0; n < 4; n++)
{
for (int t = 0; t < 4; t++)
{
for (int k = 0; k < 4; k++)
{
if (m != n && m != k && m != t && n != k && n != t && k != t)
{
int num = i[m] * 1000 + i[n] * 100 + i[t] * 10 + i[k];
Console.WriteLine(num);
}
}
}
}
}
Console.ReadLine();
}