字符串赋值中的 coredump
我想知道当我们尝试执行 getline() 函数从文件中读取一行时可能出现分段错误的场景
例如：
ifstream h("one.txt");
string s;
getline(h,s); //what assignment to 'h' can lead to segmentaion fault here (or)
//is it possible to get the segmentation fault based on the content of the file?
我需要这个的答案
I want to know the scenario where it is possible to get the segmentation fault when we try to do getline() function to read a line from a file
Eg:
ifstream h("one.txt");
string s;
getline(h,s); //what assignment to 'h' can lead to segmentaion fault here (or)
//is it possible to get the segmentation fault based on the content of the file?
I need the answer for this
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我想如果“one.txt”包含的行长度超过了内存的长度，您可能会得到未定义的行为（可能表现为段错误）。
getline()读取的字符数受到string对象的max_size()的限制，但这可能会很大。I suppose you'd probably get undefined behavior (which might manifest as a seg fault) if "one.txt" contains a line longer than can fit into memory. The number of characters read by
getline()is constrained by themax_size()of thestringobject, but that can be pretty big.假设您的代码没有未定义的行为，这几乎是不可能的 - 否则一切皆有可能，包括分段错误。标准 C++ 库被很多人使用。它经过充分测试，并对输入值进行错误检查。
It's hardly possible, assuming your code has no Undefined Behaviour - otherwise everything is possible including segmentation fault. Standard C++ Library is used by many people. It is well tested and does error checking of input values.