只是为了好玩，因为其他答案比这个好得多。

#include <boost/hana/functional/partial.hpp>
#include <iostream>
#include <range/v3/range/conversion.hpp>
#include <range/v3/view/filter.hpp>
int main() {
    using ranges::to;
    using ranges::views::filter;
    using boost::hana::partial;
    auto const& not_space = partial(std::not_equal_to<>{}, ' ');
    auto const& to_string = to<std::string>;

    std::string input = "2C F4 32 3C B9 DE";
    std::string output = input | filter(not_space) | to_string;
    assert(output == "2CF4323CB9DE");
}

string replaceinString(std::string str, std::string tofind, std::string toreplace)
{
        size_t position = 0;
        for ( position = str.find(tofind); position != std::string::npos; position = str.find(tofind,position) )
        {
                str.replace(position ,1, toreplace);
        }
        return(str);
}

使用它:

string replace = replaceinString(thisstring, " ", "%20");
string replace2 = replaceinString(thisstring, " ", "-");
string replace3 = replaceinString(thisstring, " ", "+");

# include <算法> 使用命名空间std; Int main() { ． ． s.erase(删除(s.begin (), s.end (), ' ' ), s.end ()); ． ． ｝

来源:

参考资料来自本论坛。

我创建了一个函数，从字符串的两端移除空白。如 “Hello World”，将转换为“Hello World”。

这类似于python中经常使用的strip、lstrip和rstrip函数。

string strip(string str) {
    while (str[str.length() - 1] == ' ') {
        str = str.substr(0, str.length() - 1);
    }
    while (str[0] == ' ') {
        str = str.substr(1, str.length() - 1);
    }
    return str;
}

string lstrip(string str) {
    while (str[0] == ' ') {
        str = str.substr(1, str.length() - 1);
    }
    return str;
}

string rstrip(string str) {
    while (str[str.length() - 1] == ' ') {
        str = str.substr(0, str.length() - 1);
    }
    return str;
}

  string str = "2C F4 32 3C B9 DE";
  str.erase(remove(str.begin(),str.end(),' '),str.end());
  cout << str << endl;

输出:2 cf4323cb9de

只是为了好玩，因为其他答案比这个好得多。

#include <boost/hana/functional/partial.hpp>
#include <iostream>
#include <range/v3/range/conversion.hpp>
#include <range/v3/view/filter.hpp>
int main() {
    using ranges::to;
    using ranges::views::filter;
    using boost::hana::partial;
    auto const& not_space = partial(std::not_equal_to<>{}, ' ');
    auto const& to_string = to<std::string>;

    std::string input = "2C F4 32 3C B9 DE";
    std::string output = input | filter(not_space) | to_string;
    assert(output == "2CF4323CB9DE");
}