C ++在.txt文件中查找整数值
[英]C++ Finding a integer value in a .txt file
问题描述
I have a map.txt file: 
我有一个map.txt文件：
[Map]
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[Details]
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
[Collision]
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 1 1 1 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 1 1 0 0 0 1 1 0 0 1 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
I also have a square on my screen that fills in the tile that my mouse has clicked on. 我的屏幕上还有一个正方形，填充了鼠标单击的图块。 The problem I have is I want to be able to edit the map.txt file by changing a value of it according to where on the map I click. 我遇到的问题是我希望能够根据单击的地图上的位置更改其值来编辑map.txt文件。 I need to know if there is a way I can access a certain value in the map file, like an array. 我需要知道是否有一种方法可以访问映射文件中的某个值，例如数组。 So for example getting Collision[5][8] or Details[7][17], etc. Thanks! 例如，获取Collision [5] [8]或Details [7] [17]等。谢谢！
http://screencast.com/t/gqH18wgW (This shows the clicking to find the location) http://screencast.com/t/gqH18wgW （显示点击以查找位置）
1 个解决方案
解决方案1
5 已采纳 2013-01-17 17:05:38
While you could store the location in the file of each cell and overwrite individual cells, this only works if the old and new strings are the same length. 虽然可以将位置存储在每个单元格的文件中并覆盖单个单元格，但这仅在新旧字符串长度相同时才有效。
A more flexible and very straightforward way is to: 一种更灵活，非常直接的方法是：
- Parse the file into an array. 将文件解析为数组。 (see Read integers from a text file with C++ ifstream ) （请参阅使用C ++ ifstream从文本文件读取整数 ）
- Update the array whenever the user clicks. 用户单击时更新阵列。
- When finished, turn the array back into a file. 完成后，将阵列转回到文件中。
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