c++字符串IO题目 Tom从小就对英文字母非常感兴趣，尤其是元音字母(a,e,i,o,u,A,E,I,O,U)，他在写作文的时候都会把元音字母写成大写的，辅音字母则都写成小写, 你试试把一个句子翻译成他写作文的习惯吧。 请使用字符串流解决该问题，需要有main函数，要有注释（最好英文） 输入一个字符串S(长度不超过100，只包含大小写的英文字母和空格)。 输出 按照习惯输出翻译后的字符串S。 样例1 输入（输入末尾有空格）： Who Love Solo 输出（输出末尾有空格）： whO lOvE sOlO

Here is the code:

#include <iostream>
#include <sstream>
#include <string>
using namespace std;

int main() {
    string line;
    getline(cin, line); // read a line of input from user
    istringstream iss(line); // create a string stream from the line
    string word;
    bool first = true; // a flag to indicate if it's the first word in a sentence
    while (iss >> word) { // read a word from the string stream
        if (!first) { // if it's not the first word in a sentence, add a space before it
            cout << " ";
        }
        for (char& c : word) { // convert each character in the word
            if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' 
                    || c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
                c = toupper(c); // convert a vowel to uppercase
            } else {
                c = tolower(c); // convert a consonant to lowercase
            }
        }
        cout << word; // output the converted word
        first = false; // set the flag to false
    }
    cout << endl; // output a newline at the end
    return 0;
}

This program reads a line of input from the user, and then uses a string stream to read each word from the line. For each word, it converts each character to uppercase if it's a vowel, and to lowercase otherwise. It outputs the converted word, with a space before it if it's not the first word in a sentence. Finally, it outputs a newline at the end.