cstring

I have my array of C-Strings declared as: char *argv[MAXARGS]; MAXARGS basically just tells us how many c strings are in the array for indexing purposes. I want to pass it to this function below... int builtin_cmd(char **argv) but nothing seems to go through, I called the function like this. char *argv[MAXARGS]; builtin_cmd(argv); but once i get into the function builtin_cmd and try to print using printf("%s\n", argv[0]); it prints nothing.... but when i do this before calling the function... char *argv[MAXARGS]; printf("%s\n", argv[0]); //builtin_cmd(argv); it will print the first C string in

I'm trying to use P/Invoke to call functions in an unmanaged C++ DLL from C#. The C++ DLL uses CString 's as function parameters and returns, such as CString AFX_EXT_API GetUserName(CString& userID) Unfortunately, the C++ is legacy code that I cannot change to use the more universal LPSTR (or even char * ). Is there any way to marshal the CString into a .NET compatible object? Or somehow decorate a .NET char[] to be marshaled to a CString? You can't create a CString in managed code. So clearly you need an extra layer between the managed code and the native code. This gives you an opportunity

#include <stdio.h> int main(void) { int i,j; int wordstart = -1; int wordend = -1; char words[]= "this is a test"; char temp; // Reverse each word for (i = 0; i < strlen(words); ++i) { wordstart = -1; wordend = -1; if(words[i] != ' ') wordstart = i; for (j = wordstart; j < strlen(words); ++j) { if(words[j] == ' ') { wordend = j - 1; break; } } if(wordend == -1) wordend = strlen(words); for (j = wordstart ; j <= (wordend - wordstart) / 2; ++j) { temp = words[j]; words[j] = words[wordend - (j - wordstart)]; words[wordend - (j - wordstart)] = temp; } i = wordend; printf("reversed string is %s:",

简要题意及解析 1001 \(N\) 个数分为 \(K+8\) 组，每组三个，记为 \((a,b,c)\) ，方便起见要求 \(a \leq b \leq c\) ，每组的代价是 \((a-b)^2\) ，总代价为每组的代价之和。求最小的总代价。 将所有物品 \(a[i]\) 从小到大排序，从后向前递推。 \(f[i][j]\) 表示在第 \(i\) 个到第 \(N\) 个数中选 \(j\) 组的最小代价。 \(f[i][j]=\min_{N-i+1 \leq 3 \times j} \{f[i+2][j-1]+(a[i+1]-a[i])^2\}\) 时间复杂度 \(O(Tnk)\) \(T\) 为数据组数， \(n\) 为物品个数， \(k\) 为所需组数。 1002 给出三个字符串 \(A,B,C\) ，问从 \(A\) 和 \(B\) 中按照与原顺序抽取一些字符，能不能组成 \(C\) 。 \(f[i][j]\) 表示从 \(A\) 的前 \(i\) 个和 \(B\) 的前 \(j\) 个中随意抽取，最多能组成 \(C\) 的前几位。 \(f[i][j]=\max\{f[i-1][j]+1(if~~A[i]==C[f[i-1][j]+1]),f[i][j-1]+1(if~~B[j]==C[f[i][j-1]+1])\}\) 时间复杂度 \(O(Tnm)\) \(T\)

How to marshal the type of "Cstring" in .NET Compact Framework(C#)? DLLname:Test_Cstring.dll(OS is WinCE 5.0),source code: extern "C" __declspec(dllexport) int GetStringLen(CString str) { return str.GetLength(); } I marshal that in .NET Compact Framework(C#),for example: [DllImport("Test_Cstring.dll", EntryPoint = "GetStringLen", SetLastError = true)] public extern static int GetStringLen(string s); private void Test_Cstring() { int len=-1; len=GetStringLen("abcd"); MessageBox.Show("Length:"+len.ToString()); //result is -1,so PInvoke is unsuccessful! } The Method of "GetStringLen" in .NET CF