使用std::string::compare:比较最后n个字符:

#include <iostream>

bool hasEnding (std::string const &fullString, std::string const &ending) {
    if (fullString.length() >= ending.length()) {
        return (0 == fullString.compare (fullString.length() - ending.length(), ending.length(), ending));
    } else {
        return false;
    }
}

int main () {
    std::string test1 = "binary";
    std::string test2 = "unary";
    std::string test3 = "tertiary";
    std::string test4 = "ry";
    std::string ending = "nary";

    std::cout << hasEnding (test1, ending) << std::endl;
    std::cout << hasEnding (test2, ending) << std::endl;
    std::cout << hasEnding (test3, ending) << std::endl;
    std::cout << hasEnding (test4, ending) << std::endl;

    return 0;
}

使用std::equal算法从<algorithms>与反向迭代:

std::string LogExt = ".log";
if (std::equal(LogExt.rbegin(), LogExt.rend(), filename.rbegin())) {
   …
}

从c++ 20开始引入ends_with。

设a是一个字符串，b是你要找的字符串。使用a.s ustr获取a的最后n个字符，并将它们与b进行比较(其中n是b的长度)

或者使用std::equal (include <algorithm>)

Ex:

bool EndsWith(const string& a, const string& b) {
    if (b.size() > a.size()) return false;
    return std::equal(a.begin() + a.size() - b.size(), a.end(), b.begin());
}

bool endswith(const std::string &str, const std::string &suffix)
{
    string::size_type totalSize = str.size();
    string::size_type suffixSize = suffix.size();

    if(totalSize < suffixSize) {
        return false;
    }

    return str.compare(totalSize - suffixSize, suffixSize, suffix) == 0;
}

我的观点是:

bool endsWith(std::string str, std::string suffix)
{
   return str.find(suffix, str.size() - suffix.size()) != string::npos;
}

使用boost::algorithm::ends_with(参见http://www.boost.org/doc/libs/1_34_0/doc/html/boost/algorithm/ends_with.html):

#include <boost/algorithm/string/predicate.hpp>

// works with const char* 
assert(boost::algorithm::ends_with("mystring", "ing"));

// also works with std::string
std::string haystack("mystring");
std::string needle("ing");
assert(boost::algorithm::ends_with(haystack, needle));

std::string haystack2("ng");
assert(! boost::algorithm::ends_with(haystack2, needle));