从文件中提取值并执行计算 [英] Extract Values from a file and perform calculations
问题描述
大家好，
>我正在从事一个涉及从.npd格式的文件中提取值的项目(这不是我的问题)，然后执行一些计算.
该文件包含几列数据(没有任何标题).我必须给每一列起一个名字，并做一些计算.
原始文件如下所示:
Hi guys,
>I''m working on a project that involves extracting the values from a file,that is in .npd format(this is not my problem) and then perform some calculations.
The file contains several columns of data(without any heading). I have to give each column a name, and do some calculations.
The raw file looks like :
1 $Abc 21:00:55 20 33 56 1 $Abc 21:00:56 22 34 56
2 $Abc 22:00:34 43 30 45 2 $Abc 22:00:35 44 36 45
3 $Abc 22:23:23 19 88 67 3 $Abc 22:23:24 12 82 63
4 $Abc 23:40:29 20 20 20 4 $Abc 23:40:30 26 26 24
5 $Abc 23:55:00 34 21 28 5 $Abc 23:55:01 37 26 29
1)我必须在第二，第三和第四列上执行计算，并将其打印在标题为的文件上(我刚刚设法完成了此操作).例如，将每个值加1并指定标题.
2)我必须删除从第6列开始的值！我不能使用tokenise方法，使用"$"作为定界符，因为有2列以符号"$"开头.我希望值开始
last6列必须完全删除.
1)I have to perform calculations on the 2nd, 3rd and 4th column and print it on a file with heading( Which I managed to do just now). for example add 1 to each value and give headings.
2)I have to delete the values starting from the 6th column!! I cannot use tokenise method, using "$" as delimiters because there are 2 columns starting with the symbol "$". And I want the values starting
The last6 columns must be completely removed.
Heading1 Heading 2 Heading 3
21 34 57
44 31 46
20 89 67
21 21 21
35 22 29
2)然后找到每列的平均值.
2) Then find the mean of each column.
Mean of column 1:
Mean of column 2:
Mean of column 3:
此外，其中一列还包含"N"，要计算的列在该列的左侧.
我知道如何打开文件，但是对数据进行排序有点混乱，请帮忙，示例将非常有帮助！
[更新]
我使用此代码从第4列获取值，但是无法对这些值进行任何计算.例如:
Also one of the columns contain ''N'' and the column to be calculated is to the left of this column.
I know how to open the file, but sorting the data is a bit confusing, please help, Examples would be very helpful!!!
[Update]
I used this code to get the value from the 4th column, but I cannot make any calculations on these values. for example :
void main{
str(_T("%21:00:55 $GPGGA 210055 6102.00399 six"));
CAtlString resToken;
int curPos = 24;
double val;
resToken= str.Tokenize(_T(" "),curPos);
_tprintf_s(_T("Resulting token: %s\n"), resToken);
}
这将打印第4列的值，但是我必须对该变量进行一些计算，为此，我必须将字符串从double转换为double并转换回string以打印值.这可行吗?
[/Update]
This prints the 4th column value but I have to do some calculation on that variable, For which I have to convert from string to double and back to string to print the values. Is this feasible?
[/Update]
推荐答案
Abc 21:00:55 20 33 56 1
Abc 21:00:55 20 33 56 1
Abc 21:00:56 22 34 56 2
Abc 21:00:56 22 34 56 2
Abc 22:00:34 43 30 45 2
Abc 22:00:34 43 30 45 2
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