我在从.txt文件中添加数字时遇到了一些问题。 [英] I have got some problems with adding up numbers from a .txt file.

问题描述

伙计们！
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我在学校做了功课，但我已经完成了，但结果并不完全是我想要的。



任务是通过以下规则从文本文件中获取总和：



- 第一列包含数字



- 第二个是0/1布尔值（分隔符是空格）



- 每当布尔值为如果是连续的行，程序应该加上数字



.txt文件如下所示：



20 1



30 1 $
$
40 0 zh


50 1



60 1



我写了以下代码：

Hi, guys!

I got a homework in school and I have done it but the result is not exactly what I wanted.

The task is to get sums from a text file with the following rules:

- the first column contains numbers

- the second is a 0/1 boolean (the separating character is space)

- whenever the boolean is true in continuous lines, the programme should add up the numbers

The .txt file looks like this:

20 1

30 1

40 0

50 1

60 1

And I wrote the following code:

#include <iostream>
    #include <fstream>
    #include <string>
    using namespace std;

    int main()
    {
    string line;
    double number;
    double sum;
    sum = 0;
	
	ifstream homework;
	homework.open("homework.txt");
		while (!homework.eof())
		{
			homework >> number >> boolean;

			if (boolean == 1)
			{
				sum += number;			
			}
		}

    cout << sum << endl;

	homework.close();

	system("pause");
	return 0;
    }

我希望它能写出50和110（因为有一条带有假布尔的行）但相反，它给了我160（所以它总结了所有行with true boolean）。



任何想法？

I wanted it to write out 50 and 110 (because there is a line with a false boolean) but instead, it gave me 160 (so it summed up all lines with true boolean).

Any ideas?

推荐答案

" boolean"是错的。使用可以存储的变量：

"boolean" is wrong. Use a variable where it can be stored:

int iboolean;
while (!homework.eof())
{
	homework >> number >> iboolean;
	if (iboolean == 1)
	{
		sum += number;			
	}
}

问候，Guido

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