Convert a string to unsigned long long int in C

How can I convert a string to an unsigned long long int?

如何将字符串转换为unsigned long long int?

The problem is that if I use strtol that returns a long int, but I need to convert a string longer than that.

问题是,如果我使用strtol返回一个long int,但我需要转换一个比这更长的字符串。

4 个解决方案

#1

There is strtoull() which sounds like a very good match:

有strtoull()听起来像一个非常好的匹配:

unsigned long long int strtoull(const char *nptr, char **endptr, int base);

No idea why you didn't find it.

不知道为什么你没找到它。

#2

You can use strtoll for long long type.

你可以使用strtoll长型。

You can also use sscanf with %ll format specifier to convert to long long.

您还可以使用带有%ll格式说明符的sscanf转换为long long。

Also, you can write your own implementation if it does not fulfill your purpose.

此外,如果它不能满足您的目的,您可以编写自己的实现。

#3

if only there was a standard library function that SCANned a Formated String... sscanf maybe

如果只有一个标准库函数可以扫描一个Formated String ... sscanf

#4

strtoll should do what you want.

strtoll应该做你想做的事。