自定义函数之字符提取 简单易懂 ！！

解题思路:

注意事项:

参考代码:

#include <iostream>

using namespace std;

int main()

{

string str;

cin >> str;

for (int i = 0; i < str.length(); i++) {

if (str[i] == 'a' ||str[i] == 'e' || str[i] == 'i' || str[i] == 'o' || str[i] == 'u') {

cout << str[i];

}

}

}