Question

我有一个txt文件，其中包含：

1:2
2:5
3:10
4:1

我需要能够添加这些数字。例如，我想添加到最后一行+5：

1:2
2:5
3:10
4:6

我怎样才能做到这一点？我想知道是否正确的方法是将文件输入到数组中，但我不知道如何执行此操作，因为我需要将数字分成键和值，我猜？

Answer 1

所描述的问题非常通用，但我可以做一些假设来帮助你。

初始txt文件基本上是键值存储：

#include "stdafx.h"
#include "Win32Project1.h"
#include "Browser.h"

HWND mainHWND;
WebBrowser* myBrowser = NULL;

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;                                // current instance
WCHAR szTitle[MAX_LOADSTRING];                  // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING];            // the main window class name

ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);
    OleInitialize(NULL);

    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_WIN32PROJECT1, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }
    myBrowser = new WebBrowser(mainHWND);
    //myBrowser->Navigate(L"https://google.com.vn");
    myBrowser->SetText(L"Hello!");

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32PROJECT1));

    MSG msg;

    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}

ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEXW wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WIN32PROJECT1));
    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = MAKEINTRESOURCEW(IDC_WIN32PROJECT1);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassExW(&wcex);
}

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hInst = hInstance; // Store instance handle in our global variable

   mainHWND = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

   if (!mainHWND)
   {
      return FALSE;
   }

   ShowWindow(mainHWND, nCmdShow);
   UpdateWindow(mainHWND);

   return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDM_ABOUT:
                DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                break;
            case IDM_EXIT:
                DestroyWindow(hWnd);
                break;
            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
            }
        }
        break;
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hWnd, &ps);
            // TODO: Add any drawing code that uses hdc here...
            EndPaint(hWnd, &ps);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    // Removed
    return (INT_PTR)FALSE;
}

假设第一个数字是关键字，您应该告诉您的算法使用关键字1:2 2:5 3:10 4:1对该行执行+x求和。

在（未经测试和未优化的）PHP代码中：

然后将其称为：

function addToStore($destKey, $numberToSum) {
    $newStore = [];

    foreach(file('store.txt') as $line) {
        list($key, $value) = explode(':', $line);

        if( $key === $destKey) {
            $value += $numberToSum;
        }

        newStore[] = "$key:$value";
    }

    file_put_contents('store.txt', implode("\n", $newStore));
}

Answer 2

这样的事情：

// get from file
$file = file('file.txt');
$array = [];
foreach ($file as $line) {
    list($column1, $column2) = explode(':', $line);
    $array[(int) $column1] = (int) $column2;
}

// add number
$array[4] += 5;

// save to file
$content = '';
foreach ($array as $column1 => $column2) {
    $content .= $column1 . ":" . $column2 . "\n";
}
file_put_contents('file.txt', $content);

但是，您必须确保第一列中的索引是唯一的，否则将跳过某些行（实际被覆盖）。

Answer 3

是的，当您以数组形式获得数字时，可以为其添加数字，并且您可以按照下面给出的键/值格式保存文本文件数据。

$ file_array = array（）;

$ myfile = fopen（＆＃34; yourtextfile.txt＆＃34;，＆＃34; r＆＃34;）或   死（＆＃34;无法打开文件！＆＃34;）;

//读取一行直到文件结尾

while（！feof（$ myfile））{
  $ line = fgets（$ myfile）;

$ line_array = explode（＆＃34;：＆＃34;，$ line）; //拆分每一行以制作数组

$ file_array [$ line_array [0]] = $ line_array [1];

}

FCLOSE（$ MYFILE）; // file_array应该将文件数据显示为数组

print_r（$ file_array）;

希望这可以帮助你!!

PHP：将数组值拆分为键和值

3 个答案: