从C#调用Rand或SRand(在Windows 7 x64中)

问题描述

我无法正确P调用C Rand和SRand函数.
我在x64和x86模式下都尝试过，但是堆栈不平衡或只有两位数字(38 41 45 ...).
我相信我们应该期望更大的数字0lt; = n< 2 ^ 32.

任何人都可以发现问题:

X64

I can''t manage to PInvoke properly the C Rand and SRand functions.
I tried in both x64 and x86 modes but I get either unbalanced stacks or just two digits numbers (38 41 45...).
I believe we should be expecting much bigger numbers 0<=n<2^32.

Can anyone spot the problem:

X64

//[DllImport(@"C:\Windows\SysWOW64\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
[DllImport(@"C:\Windows\System32\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern Int64 srand(UInt64 seed);

//[DllImport(@"C:\Windows\SysWOW64\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
[DllImport(@"C:\Windows\System32\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern Int64 rand();


public static void Main()
{
    for (uint i = 0; i < 10; i++)
    {
        srand(i);
        Console.WriteLine(rand());
    }

}

X86

X86

[DllImport(@"C:\Windows\SysWOW64\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
//[DllImport(@"C:\Windows\System32\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern Int64 srand(UInt32 seed);

[DllImport(@"C:\Windows\SysWOW64\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
//[DllImport(@"C:\Windows\System32\msvcrt.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern Int32 rand();


public static void Main()
{
    for (uint i = 0; i < 10; i++)
    {
        srand(i);
        Console.WriteLine(rand());
    }

}

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