我是C ++的初学者。我正在尝试调试我的代码因为我确定有一些指针错误，所以我仍然试图理解，但我无法编译它。代码最初来自我编写的java程序，它只是一个带有一些比较方法的歌曲类，我将它转录为c ++以尝试学习语言之间的差异，代码本身没有显示任何错误，但它只是可以＆＃39 ; t编译时没有弹出错误。我已经尝试查看此错误的解决方案，但发现没有任何作用，所以这里是我的win32控制台项目的代码。谢谢你的帮助。
// ConsoleApplication4.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <string>
#include <iostream>
using namespace std;
class Song {
private:
string Artist;
string Title;
string Lyrics;
public:
static int Sortcount;
static int Searchcount;
Song(string A_Artist, string T_Title, string L_Lyrics) {
Artist = A_Artist;
Title = T_Title;
Lyrics = L_Lyrics;
}
//Compares the artist of one song to another.
class ArtistComparator {
public:
int compare(Song *o1, Song *o2) {
string Artist1 = (*o1).Artist;
string Artist2 = (*o2).Artist;
Searchcount++;
if (Artist1.compare(Artist2) == 0){
return 0;
}
Searchcount++;
return (*o1).Artist.compare((*o2).Artist);
}
};
//Compares the title of one song to another.
class TitleComparator {
public:
int compare(Song arg0, Song arg1) {
string Title1 = arg0.Title;
string Title2 = arg1.Title;
return Title1.compare(Title2);
}
};
public:
//Testing method to make sure the Song class works and
//the compareTo method works.
int main(int argc, char** argv){
Song test1 = Song("cat", "bat", "this is not a real song");
Song test2 = Song("cat", "apple", "also not a real song");
int compareResult = test1.compareTo(test2);
if (compareResult == -1){
std::cout << "test1 comes first";
}
else{
cout << "test2 comes first";
cout << test2.toString();
}
};
string getArtist(){
return Artist;
};
string getTitle(){
return Title;
};
string getLyrics(){
return Lyrics;
};
string toString(){
return Artist + ", " + Title + ", " + Lyrics;
};
//compareTo method used for sorting songs.
//increments Sortcount each time it is called to keep track
//of the efficiency of the sort algorithm.
private:
int compareTo(Song other){
Sortcount++;
int art = Artist.compare(other.Artist);
if (art == 0){
return Title.compare(other.Title);
}
else
return art;
}
};
答案 0 :(得分：0)
#include "stdafx.h"
#include <string>
#include <iostream>
using namespace std;
class Song {
private:
string Artist;
string Title;
string Lyrics;
public:
int Sortcount;
static int Searchcount;
Song(string A_Artist, string T_Title, string L_Lyrics) {
Artist = A_Artist;
Title = T_Title;
Lyrics = L_Lyrics;
}
//Compares the artist of one song to another.
class ArtistComparator {
public:
int compare(Song *o1, Song *o2) {
string Artist1 = (*o1).Artist;
string Artist2 = (*o2).Artist;
Searchcount++;
if (Artist1.compare(Artist2) == 0){
return 0;
}
Searchcount++;
return (*o1).Artist.compare((*o2).Artist);
}
};
//Compares the title of one song to another.
class TitleComparator {
public:
int compare(Song arg0, Song arg1) {
string Title1 = arg0.Title;
string Title2 = arg1.Title;
return Title1.compare(Title2);
}
};
public:
//Testing method to make sure the Song class works and
//the compareTo method works.
string getArtist(){
return Artist;
};
string getTitle(){
return Title;
};
string getLyrics(){
return Lyrics;
};
string toString(){
return Artist + ", " + Title + ", " + Lyrics;
};
//compareTo method used for sorting songs.
//increments Sortcount each time it is called to keep track
//of the efficiency of the sort algorithm.
int compareTo(Song other){
Sortcount++;
int art = Artist.compare(other.Artist);
if (art == 0){
return Title.compare(other.Title);
}
else
return art;
}
};
int main(int argc, char** argv){
Song test1 = Song("cat", "bat", "this is not a real song");
Song test2 = Song("cat", "apple", "also not a real song");
int compareResult = test1.compareTo(test2);
if (compareResult == -1){
std::cout << "test1 comes first";
}
else{
cout << "test2 comes first";
cout << test2.toString();
}
getchar();
return 0;
}
完成了更改：
main() compareTo()函数public，因为它被直接调用static删除了int Sortcount，因为我无法更新变量。