Question

我正在尝试使用Excel VBA在Access表的新列中修改数据类型的字段大小。我有以下代码可用：

#include <iostream>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>

using namespace std;

typedef struct node
{
    int data, min;
    struct node *next;
}node;

bool isempty(node *head)
{
    return !head;
}

void display(node *head)
{
    while(head)
    {
        cout<<head->data<<"-->";
        head=head->next;
    }
    cout<<"\n";
}

int get_min(node *head)
{
    return head->min;
}

int peek(node *head)
{
    if(isempty(head))
        return INT_MIN;

    return head->data;
}

void push(node **head_ref, int data)
{
    node *new_node;
    new_node=(node*)malloc(sizeof(node));

    new_node->data=data;
    if((*head_ref)==NULL || data <= get_min((*head_ref)))
    {
        new_node->min=data;
    }
    else
    {
        new_node->min=(*head_ref)->min;
    }

    new_node->next=(*head_ref);
    (*head_ref)=new_node;
}



int pop(node **head_ref)
{
    if(isempty((*head_ref)))
        return INT_MIN;

    int c=(*head_ref)->data;
    node *temp=(*head_ref);

    (*head_ref)=(*head_ref)->next;
    free(temp);
    return c;
}




int main()
{
    node *head=NULL;
    push(&head, 3);
    push(&head, 0);
    push(&head, 1);

    display(head);

    cout<<get_min(head);
    return 0;
}

我的问题是我的一些数字需要Double格式，有些需要Long Integer格式。我找不到任何关于如何使用TEXT字段长度来指定的文档。有什么想法吗？

Answer 1

好的，我明白了。这简直太简单了。

InsertDataCommand = "ALTER TABLE " & TableName & " ADD COLUMN " & ColumnName & " "
Select Case DataType
    Case Is = "TEXT"
        InsertDataCommand = InsertDataCommand & DataType & "(" & DataLength & ")"
    Case Is = "LONG INTEGER"
        InsertDataCommand = InsertDataCommand & DataType
    Case Is = "DOUBLE"
        InsertDataCommand = InsertDataCommand & DataType
    Case Is = "MEMO"
        InsertDataCommand = InsertDataCommand & DataType
    Case Is = "DATE"
        InsertDataCommand = InsertDataCommand & DataType
End Select

AccessObject.CurrentProject.Connection.Execute (InsertDataCommand)

我认为Number类型必须指定Text类型所做的相同类型的语句，但是它没有。

使用更改表添加列修改列数据格式

1 个答案: