c++ - 在 C++ 中读取文件时，您如何做到在文件末尾有换行符？

Question

我写了这个有指南的程序，但是当它打印出指南时，它输出:

guideWould you like to run this program again (y/n):

但我希望它输出的是:

guide
Would you like to run this program again (y/n):

请注意，引导部分来自文件，而不是 cout 语句。我的代码如下所示:

#include <iostream>
#include <cmath>
#include <string>
#include <algorithm>
#include <fstream>

using namespace std;

int main(){
    // Declare the variables and arrays
    int varNum = 1;
    int totVar = 0;
    int choice = 0;
    int userNums[1000] = {};
    double ch1 = 0;
    double ch2 = 0;
    double total = 0;
    double avg = 0;
    string sym = "";
    char dec = 'y';


    //Ask the user for their choice and then record it
    cout << "6) Guide \n";
    cout << "Your choice: ";
    cin >> choice;


                } else if(choice == 6){
                    ifstream f("guide.txt");

                    if (f.is_open())
                    cout << f.rdbuf();

                }
    cout << "Would you like to run this program again? (y/n): ";
    cin >> dec;
    if(dec == 'y') return main();
    return 0;
}

Answer 1

我假设您的打印语句类似于:

cout << "guide";
cout << "Would you like to run this program again (y/n):";

如果你想在“guide”和“Would”之间包含一个换行符，你需要做的就是包含一个\n。或使用 endl像这样:

cout << "guide\n";
cout << "Would you like to run this program again (y/n):";

或者替代地

cout << "guide" << endl;
cout << "Would you like to run this program again (y/n):";

编辑:

您需要做的就是 \n就在“你想再次运行这个程序吗(是/否):”之前，它看起来像这样 cout << "\nWould you like to run this program again (y/n):";