如何使用 boost 字符串算法 starts_with：最小示例
boost_starts_with.cpp
#include <boost/algorithm/string/predicate.hpp>
#include <string>
#include <iostream>
int main() {
std::string mystr = "foobar";
// 打印 "true, false"
std::cout << std::boolalpha
<< boost::algorithm::starts_with(mystr, "foo") << ", "
<< boost::algorithm::starts_with(mystr, "bar") << std::endl;
}另请参阅：如何使用 boost 字符串算法 ends_with：最小示例
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