C++ 提取字符串中的所有数字

上代码

例:

源数据 ： a10b123cc45啊4859

解析后：10 123 45 4858

#include
#include
#include
#include
using namespace std;

list GetStringByNumArr(string str);

int main()
{
	while (true)
	{
		cout << "请输入字符串" << endl;
		string str;
		cin >> str;
		list nums = GetStringByNumArr(str);

		for (list::iterator it = nums.begin(); it != nums.end(); it++)
		{
			cout << *it << endl;
		}
	}

	system("pause");
	return 0;
}

char numarr[] = {
	'0',
	'1',
	'2',
	'3',
	'4',
	'5',
	'6',
	'7',
	'8',
	'9',
};

list GetStringByNumArr(string str) {

	list numlist;
	int startIndex = 0;

	while (startIndex != -1)
	{
		vector tempnum;

		startIndex = -1;

		for (size_t i = 0; i < str.length(); i++)
		{
			for (size_t j = 0; j < (sizeof(numarr) / sizeof(numarr[0]) - 1); j++)
			{
				if (str[i] == numarr[j])
				{
					startIndex = i;
					break;
				}
			}

			if (startIndex != -1)
			{
				tempnum.push_back(str[startIndex]);
				int tempindex = 0;

				//向下查找数据
				char tempchar = str[startIndex + (tempindex += 1)];

				//表示为数字
				while (int(tempchar - 48) >= 0 && int(tempchar - 48) <= 9)
				{
					tempnum.push_back(tempchar);
					tempchar = str[startIndex + (tempindex += 1)];
				}

				//删除查询到的数据
				str.erase(startIndex, tempindex);
				break;
			}
		}
		
		if (!tempnum.empty()) {
			//cout << "tempnum : " << string(tempnum.begin(), tempnum.end()) << endl;
			numlist.push_back(stoi(string(tempnum.begin(), tempnum.end())));
		}
	}

	return numlist;
}