'stol'使用VisualStudio但不是gcc抛出的异常-Exceptionthrownby'stol'usingVisualStudiobutnotgcc

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Under Windows the type long is always 32-bits. Since long is a signed integer type this means that the range of long is between -2147483648 and 2147483647 inclusive. On Linux the size of long depends on whether you're compiling for 32-bits or 64-bits.

在Windows下,long类型总是32位。由于long是有符号整数类型,这意味着long的范围介于-2147483648和2147483647之间。在Linux上,long的大小取决于您是编译32位还是64位。

Since std:stol converts a string to long the result must fit into a long. If it doesn't then the function throws std::out_of_range. To resolve this problem you can use std::stoll which returns a long long, which is guaranteed to be at least 64-bits and so won't ever throw an exception when converting "4294967295". You can also use std::stoul, which converts to a unsigned long, which is is guaranteed to have a range of at least 0 to 4294967295.

由于std:stol将字符串转换为long,因此结果必须适合long。如果没有,则函数抛出std :: out_of_range。要解决此问题,您可以使用std :: stoll,它返回一个long long,保证至少为64位,因此在转换“4294967295”时不会抛出异常。你也可以使用std :: stoul,它转换为无符号长整数,保证其范围至少为0到4294967295。

(Note that this is not strictly a Visual C++ versus GCC thing. When targeting Windows, GCC also always uses a 32-bit long.)

(请注意,这不是严格意义上的Visual C ++与GCC的对比。当针对Windows时,GCC也总是使用32位长。)

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My bet would be a 32 bits long on visual studio (max 2^31, so overflow) and a 64 bits long on GCC (so nowhere near overflow).

我的赌注是视觉工作室的32位长(最大2 ^ 31,因此溢出)和GCC上的64位长(因此无处接近溢出)。

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Not a compiler bug, the problem is your invalid assumptions.

不是编译器错误,问题是你的无效假设。

The Standard allows LONG_MAX to be as low as 2147483647, so

标准允许LONG_MAX低至2147483647,所以

stol returns a long so the size of temp should be big enough to hold the value.

stol返回一个long,因此temp的大小应足够大以容纳该值。

simply is not true.

根本不是真的。

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So just use std::stoul instead.

所以只需使用std :: stoul。

At first glance the string constant certainly exceeds the maximum value a long can assume, but not the max value an unsigned long can have...

乍一看,字符串常量肯定超过了long可以假设的最大值,但不是unsigned long可以具有的最大值...

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From

http://en.cppreference.com/w/cpp/string/byte/strtol

strtol returns a long and you need strtoll to get a long long

strtol返回很长时间,你需要strtoll才能获得很长时间