c++之to_string函数调用
函数原型：
string to_string (int val);
string to_string (long val);
string to_string (long long val);
string to_string (unsigned val);
string to_string (unsigned long val);
string to_string (unsigned long long val);
string to_string (float val);
string to_string (double val);
string to_string (long double val);
功能：
将数值转化为字符串。返回对应的字符串。
例子：
#include <iostream>
#include <string>
using namespace std;
int main()
{
string pi = "pi is " + std::to_string(3.1415926);
string perfect = to_string(1 + 2 + 4 + 7 + 14) + " is a perfect number";
cout << pi << '\n';
cout << perfect << '\n';
system("pause");
return 0;
}
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