C++ 简单的字符串转换

最新推荐文章于 2023-08-22 21:41:09 发布

最新推荐文章于 2023-08-22 21:41:09 发布 · 146 阅读

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#include <iostream>
#include <string>
#include <sstream>
#include <complex>

using namespace std;

template<typename T>
T fromString(const string &s)
{
	istringstream is(s);
	T t;
	is >> t;

	return t;
}

template<typename T>
string toString(const T &t)
{
	ostringstream s;
	s << t;

	return s.str();
}

int main(int argc, char *argv[])
{
	int i = 12345;
	cout << "i == \"" << toString(i) << "\"" << endl;
	float x = 567.89;
	cout << "x == \"" << toString(x) << "\"" << endl;
	complex<float> c(1.0, 2.0);
	cout << "c == \"" << toString(c) << "\"" << endl << endl;

	i = fromString<int>(string("1234"));
	cout << "i == " << i << endl;

	x = fromString<float>(string("567.89"));
	cout << "x == " << x << endl;

	c = fromString< complex<float> >(string("(1.0, 2.0)"));
	cout << "c == " << c << endl;

	return 0;
}

运行结果为：

i == "12345"
x == "567.89"
c == "(1,2)"

i == 1234
x == 567.89
c == (1,2)