当我从文件中执行getline命令，然后打印那一行时，如果我试图在变量所在的行上打印一些东西，它就会被打印掉，输出的最后一行是唯一正确的。

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

bool CheckIfPalindrome(string phrase);

int main() {
    ifstream inputFile;

    inputFile.open("p.txt");
    
    string line;
    bool isPalindrome;

    while(getline(inputFile, line)){
        isPalindrome = CheckIfPalindrome(line);
    
        if (isPalindrome == true) {
            cout << line << " is a palindrome" << endl;            
        } else {
            cout << line << " is not a palindrome" << endl;
        }
    }
    
    inputFile.close();
    return 0;
}

//Checks if the phrase is a palindrome
bool CheckIfPalindrome(string phrase) {
    bool isPalindrome = true;

    for (size_t i = 0 ; i <= phrase.length() ; i++) {
        if (phrase[i] != phrase[(phrase.length() - i) -1]){
            isPalindrome = false;
            i = 100;
        }
    }
    
    return isPalindrome;
}

输出为：

is not a palindrome
 is not a palindrome
 is not a palindrome
 is not a palindrome Elba.
 is not a palindromeal: Panama!
 is not a palindrome
 is not a palindrome
racecar is a palindrome

所以很明显它正确地保存了字符串，但是只是打印了变量。如果这改变了什么，编译器就会被bash。