declare

问题 I am dealing with an array whose length is determined during the execution of the program. So I am making use of a block statement in which I can set the limits of the array. I am having problems to write the elements of the array to a file as I was using a stub for the write procedure . I removed the stub to have everything in the same code. Though now my code compiles and run , it is not writing to the file. Here is the code: with Ada.Float_Text_IO; with Ada.Integer_Text_IO; with Ada.Text

问题 I notice in the MSDN documentation that there are multiple ways to declare a reference to a function in an external DLL from within a VB.NET program. The confusing thing is that MSDN claims that you can only use the DllImportAttribute class with Shared Function prototypes "in rare cases", but I couldn't find the explanation for this statement, while you can simply use the Declare keyword instead. Why are these different, and where would I appropriately use each case? 回答1: Declare is really an

问题 As said in the php reference Namespaces are declared using the namespace keyword. A file containing a namespace must declare the namespace at the top of the file before any other code - with one exception: the declare keyword. But further we've the following code snippet in the reference: <?php namespace MyProject; const CONNECT_OK = 1; class Connection { /* ... */ } function connect() { /* ... */ } namespace AnotherProject; //This namespace declaration doesn't located at the top of the file.

问题 I am trying to create an array of structures but it appears this bug: "Error, array type as incomplete element type" typedef struct { char data[MAX_WORD_SIZE]; int total_count; Occurrence_t reference[MAX_FILES]; int nfiles; } Word_t; struct Word_t array[a]; 回答1: TL;DR Either change you struct definition struct Word_t { char data[MAX_WORD_SIZE]; int total_count; Occurrence_t reference[MAX_FILES]; int nfiles; }; Or (and not both), the array declaration: Word_t array[a]; What you did is define

问题 Objective : Declare a comma seperated string constant test.csv ========= a b c d e f Pig Script : %declare ACTIVE_VALUES 'a', 'b','c' ; -- Declaring constant like this using "" (double quotes) or even using escape characters (\) is resulting in a WARN message as below -- WARN org.apache.pig.tools.parameters.PreprocessorContext - Warning : Multiple values found for ACTIVE_VALUES A = LOAD 'test.csv' using PigStorage(',') AS (value:chararray); B = FILTER A BY value in ($ACTIVE_VALUES); dump B;

问题 This question already has answers here : Double closing angle brackets (>>) generate syntax error in SPECIFIC case (2 answers) Closed 4 years ago . I want to find the biggerst contour in my image (with opencv and C++). I have been read this thread: Finding Contours in OpenCV? and Draw the biggest element conncted using areaContours (OpenCV ) but I got error: 'varName' was not declared in this scope, which mean compiler think I haven't been declare that variable right? So this snippet of my

问题 So far I have this code: declare @random int, @upper int, @lower int, @rndtb varchar(20) set @lower = 1 set @upper = 999 select @random = ROUND(((@upper - @lower) * rand() + @lower),0) select @rndtb = '##show'+cast(@random as varchar(20))+'' But that gives me Conversion failed when converting the varchar value '##show' to data type int. What I am trying to achieve is to create a table ##show+random number each time the query is executed. Example : ##show01 ##show78 ##show43 Edited with what

问题 I have to create many variables inside a loop, so I need to create generic variable names (note, for the purpose of my code, i can't just append the objects i want to create to a list or collection) The code I was thinking looks something like this (n is a user defined variable, and its an integer) Dim var_name As String For i = 1 To n var_name = "test" & i Set var_name = Range(Cells(1, 1), Cells(i * 2, i)) Next i I would like to obtain variables like this: test1 being a range from A1 to B2

问题 I'd like to call OPL CPLEX and solve problems in a program coded on Excel VBA. I want to create an OPL model and, load .mod and .dat file into that model. After a long search process on the internet, I came up with some lines of script below released on IBM website. Sub CPLEXCallHere() 'To create the Concert environment Dim oplF As Oplfactory 'To create the error handler Dim errorHandler As OplErrorHandler 'To identify the model source Dim modelSource As OplModelSource 'To identify the model

问题 The full error description is as per below: And I found a few similar question posted before: A and B But the question in A and B does not provide detail of problem description (perhaps we prompted the same error message but caused by different reason? I am not sure..). Any how, answer in A and B does not have good solution. So I decided to post the similar question with some more details. My problem is as per below: The Designer auto generate a new code (ErrSer1.Designer) which contain the