c++ - 如何使它在 C++ 中只读取一个单词

Question

这是我的代码：

char *reason = strtok(NULL, "\n");
std::string kickreason = "No reason";
if(reason)
kickreason = reason;

如何让“kickreason”只读 1 个字？所以如果用户输入“haha lol XD”它只会读到“haha”？

Answer 1

将字符串放入 astd::istringstream并使用普通输入运算符>>：

std::istringstream iss("haha lol XD");
std::string word;

iss >> word;

std::cout << "First word is \"" << word << "\"\n";

Answer 2

stringstream::operator>>(string)? 那是您需要查看的地方。

像这样：

istringstream str("no reason");
string oneword = "";
str >> oneword;

Answer 3

如何使用 strtok()

#include <stdio.h>
#include <iostream>

int main(int argc, char *argv[]) {
    char sentence[] = "haha lol XD";  
    char * word;
    std::cout << "Your sentence: " << sentence << std::endl;
    word = strtok (sentence," ");
    std::cout << "First word: " << word << std::endl;

    return 0;
}

输出是

Your sentence: haha lol XD
First word: haha