如何在C++中从字符串中拆分字符？

#include <iostream>
#include <string>
#include <vector>

int main() {
    std::string str = "Hello World";
    std::vector<char> chars;

    for (int i = 0; i < str.length(); i++) {
        chars.push_back(str[i]);
    }

    // 输出拆分后的字符
    for (char c : chars) {
        std::cout << c << " ";
    }

    return 0;
}

#include <iostream>
#include <string>
#include <sstream>
#include <vector>

int main() {
    std::string str = "Hello World";
    std::vector<std::string> substrings;
    std::stringstream ss(str);
    std::string substring;

    while (getline(ss, substring, ' ')) {
        substrings.push_back(substring);
    }

    // 输出拆分后的子字符串
    for (std::string s : substrings) {
        std::cout << s << " ";
    }

    return 0;
}

#include <iostream>
#include <string>
#include <vector>

int main() {
    std::string str = "Hello World";
    std::vector<std::string> substrings;
    size_t pos = 0;
    std::string delimiter = " ";

    while ((pos = str.find(delimiter)) != std::string::npos) {
        std::string substring = str.substr(0, pos);
        substrings.push_back(substring);
        str.erase(0, pos + delimiter.length());
    }

    // 添加最后一个子字符串
    substrings.push_back(str);

    // 输出拆分后的子字符串
    for (std::string s : substrings) {
        std::cout << s << " ";
    }

    return 0;
}