C++ - 从字符串中提取数字
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C++ - extract numbers from a string
提问by user2064000
Let's say we have a C style string in C++ in the format [4 letters] [number] [number] .... For example, the string may look like:
假设我们在 C++ 中有一个 C 风格的字符串，格式为[4 letters] [number] [number] .... 例如，字符串可能如下所示：
abcd 1234 -6242 1212
It should be noted that the string is expected to have too much whitespace (as seen above).
应该注意的是，字符串预计会有太多空格（如上所示）。
How would I extract these three numbers and store them in an array?
我将如何提取这三个数字并将它们存储在一个数组中？
回答by sehe
A job for stringstreams, see it live: http://ideone.com/e8GjMg
stringstreams 的工作，请实时查看：http: //ideone.com/e8GjMg
#include <sstream>
#include <iostream>
int main()
{
std::istringstream iss(" abcd 1234 -6242 1212");
std::string s;
int a, b, c;
iss >> s >> a >> b >> c;
std::cout << s << " " << a << " " << b << " " << c << std::endl;
}
Prints
印刷
abcd 1234 -6242 1212
