我的程序返回建模为c-strings的变量的垃圾值。该程序使用类来建模数据类型Song。设置变量时会出现错误 下面列出了对程序和输出的输入 我为代码的长度道歉。
为什么是随机值?
#include <iostream>
#include <cstring>
using namespace std;
const int MAX_CHAR = 100;
class Song
{
public:
//Default constructor
Song();
//Constructor
Song(char title[], char artist[], char album[], int min, int sec);
//Destructor
~Song();
//Accessor functions
char getTitle()const;
char getArtist() const;
char getAlbum() const;
int getMin() const;
int getSec() const;
//Mutator functions
void setTitle(const char*);
void setArtist(const char*);
void setAlbum(const char*);
void setMin(int);
void setSec(int);
private:
//Member Variables
char title[MAX_CHAR];
char artist[MAX_CHAR];
char album[MAX_CHAR];
int min;
int sec;
};
Song::Song(){}
Song::Song(char newTitle[],char newArtist[],char newAlbum[], int newMin, int newSec)
{
strncpy(title, newTitle, 100);
strncpy(artist, newArtist, 100);
strncpy (album, newAlbum, 100);
min = newMin;
sec = newSec;
}
Song::~Song(){}
//getter functions
char Song::getTitle() const
{
return title[MAX_CHAR];
}
char Song::getArtist() const
{
return artist[MAX_CHAR];
}
char Song::getAlbum() const
{
return album[MAX_CHAR];
}
int Song::getMin() const
{
return min;
}
int Song::getSec() const
{
return sec;
}
//setter functions
void Song::setTitle(const char newTitle[])
{
strcpy(title, newTitle);
}
void Song::setArtist(const char newArtist[])
{
strcpy(artist, newArtist);
}
void Song::setAlbum(const char newAlbum[])
{
strcpy(album, newAlbum);
}
void Song::setMin(int min)
{
this->min = min;
}
void Song::setSec(int sec)
{
this->sec = sec;
}
int main ()
{
char newTitle[MAX_CHAR];
char newArtist[MAX_CHAR];
char newAlbum[MAX_CHAR];
int min;
int sec;
cout << "Enter title: ";
cin >> newTitle;
cout << "Enter artist: ";
cin >> newArtist;
cout << "Enter album: ";
cin >> newAlbum;
cout << "Enter minutes: ";
cin >> min;
cout << "Enter seconds: ";
cin >> sec;
Song song;
song.setTitle(newTitle);
song.setArtist(newArtist);
song.setAlbum(newAlbum);
song.setMin(min);
song.setSec(sec);
cout << endl << "Title: " << song.getTitle() << endl <<
"Artist: " << song.getArtist() << endl <<
"Album: " << song.getAlbum() << endl <<
"Minutes: " << song.getMin() << endl <<
"Seconds: " << song.getSec() << endl;
return 0;
}
一致返回的输入和错误值:
//Inputs
Enter title: title
Enter artist: artist
Enter album: album
Enter minutes: 3
Enter seconds: 20
//Outputs
Title: a
Artist: a
Album:
Minutes: 3
Seconds: 20
答案 0 :(得分:1)
问题出在你的getter成员函数中,你实际上返回的是一个字符,而不是数组。您需要进行以下更改:
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