英文:
How to stop my setter function from filling all the variables when I press enter in C++?
问题
我创建了一个类，在这个类中，我定义了字符串和整数数据类型的成员变量。
当调用该函数创建一个新对象时，我输入字符串值，按<kbd>Enter</kbd>，然后所有剩下的变量都被赋予一些默认值，然后我的程序结束。
我不知道如何阻止它只是结束，并让我输入每个字符串值。
这是我的代码副本：
#include <iostream> // 用于输入和输出的头文件
#include <iomanip> // 用于使用 setw 的头文件
#include <math.h> // 用于使用 power 函数的头文件
using namespace std;
class MovieData
{
private:
string title, director;
int year, runTime;
public:
void setInfo()
{
cout << "电影标题：";
cin >> title;
cout << "导演：";
cin >> director;
cout << "年份：";
cin >> year;
cout << "播放时间：";
cin >> runTime;
}
void displayInfo ()
{
cout << "电影标题 " << title << endl;
cout << "导演 " << director << endl;
cout << "年份 " << year << endl;
cout << "播放时间 " << runTime << endl;
}
};
int main() {
MovieData movie1, movie2;
movie1.setInfo();
movie2.setInfo();
movie1.displayInfo();
movie2.displayInfo();
return 0;
}
我尝试将字符串变量定义为C字符串，即字符数组，以查看是否会有帮助，但结果是一样的。
英文:
I created a class where I am defining member variables of string and integer data types.
When the function is called for a new object, I type in the string value, press <kbd>Enter</kbd>, and all the variables left are given some default value, and my program ends.
I do not know how to stop it from just ending, and letting me type each string value.
Here is a copy of my code:
#include <iostream> //Header file needed to do inputs and outputs
#include <iomanip> //Header file needed to use setw
#include <math.h> //Header file needed to use power function
using namespace std;
class MovieData
{
private:
string title, director;
int year, runTime;
public:
void setInfo()
{
cout << "Movie title: ";
cin >> title;
cout << "Diector: ";
cin >> director;
cout << "Year: ";
cin >> year;
cout << "Runnign Time: ";
runTime;
}
void displayInfo ()
{
cout << "Movie title " << title << endl;
cout << "Director " << director << endl;
cout << "Year " << year << endl;
cout << "Run Time " << runTime << endl;
}
};
int main() {
MovieData movie1, movie2;
movie1.setInfo();
movie2.setInfo();
movie1.displayInfo();
movie2.displayInfo();
return 0;
}
I tried defining string variables as c-string, so character arrays, to see if that would help the issue, but it is the same.
答案1
得分: 1
将这一行
runTime;
改为
cin >> runTime;
英文:
Change this line
runTime;
to
cin >> runTime;
答案2
得分: 1
cout << "电影标题：";
cin >> title;
cout << "导演：";
cin >> director;
使用>>在字符串上只读取单个单词，所以如果你输入魔戒，那么title将等于"魔"，director将等于"戒"，等等。
如果你想要读取一整行文本，请使用std::getline()：
cout << "电影标题：";
getline(cin, title);
cout << "导演：";
getline(cin, director);
当你开始使用getline()时，非常重要的是阅读（并理解）这篇帖子：
https://stackoverflow.com/questions/21567291/
英文:
A couple of issues pointed out in the other comments and answers, but the main issue is this code:
cout << "Movie title: ";
cin >> title;
cout << "Director: ";
cin >> director;
Using >> on a string reads a single word only, so if you type Lord of the Rings, then title will equal "Lord" and director will equal "of", etc.
If you want to read a whole line of text then use std::getline():
cout << "Movie title: ";
getline(cin, title);
cout << "Director: ";
getline(cin, director);
When you start using getline(), it's very important to read (and understand) this post:
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