c++ - 创建包含多个变量的大字符串的最佳方法？

Question

我想创建一个包含很多变量的字符串:

std::string name1 = "Frank";
std::string name2 = "Joe";
std::string name3 = "Nancy";
std::string name4 = "Sherlock";

std::string sentence;

sentence =   name1 + " and " + name2 + " sat down with " + name3;
sentence += " to play cards, while " + name4 + " played the violin.";

这应该会产生一个句子

Frank 和 Joe 与 Nancy 坐下来打牌，而 Sherlock 拉 fiddle 。

我的问题是:实现此目标的最佳方法是什么？我担心不断使用 + 运算符效率低下。有没有更好的办法？

Answer 1

是的，std::stringstream，例如:

#include <sstream>
...

std::string name1 = "Frank";
std::string name2 = "Joe";
std::string name3 = "Nancy";
std::string name4 = "Sherlock";

std::ostringstream stream;
stream << name1 << " and " << name2 << " sat down with " << name3;
stream << " to play cards, while " << name4 << " played the violin.";

std::string sentence = stream.str();