使用fstream从文件中读取多个值? [英] Read multiple values from file with fstream?

问题描述

我可以用制表符分隔的文本文件读取多个值吗

Can I read multiple values from tab separated text file with

double value1, value2, value3;
ifstream in;
fin.open ("myfile.dat", ifstream::in);
fin >> value1 >> value2 >> value3;

我所有值都为零.

推荐答案

好的，在您的代码中存在三个重要错误:

Ok, in your code there are three important mistakes:

在此范围内未声明
• fin(您可能需要将第二行的in更改为fin)
• ofstream::in不存在，您可能是说fstream::in
• 您还应该确保输入文件存在.这可以通过fin.good()
完成

• fin was not declared in this scope (you probably need to change the in at the second line to fin)
• ofstream::in does not exist, you probably mean fstream::in
• you should also make sure that your input file exist. This can be done with fin.good()

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