C++程序从打印功能中崩溃
目前,我的程序在显示了它应该显示的250行中的一行之后崩溃了。这是我的密码:C++程序从打印功能中崩溃,c++,C++,目前,我的程序在显示了它应该显示的250行中的一行之后崩溃了。这是我的密码: string MovieList::PrintAll() { for (int i = 0; i < last_movie_index; i++) { movies[last_movie_index].Movie::PrintMovie(); } } string Movie::PrintMovie() { cout << fixed << setpr
string MovieList::PrintAll() {
for (int i = 0; i < last_movie_index; i++) {
movies[last_movie_index].Movie::PrintMovie();
}
}
string Movie::PrintMovie() {
cout << fixed << setprecision(1) << rating << "\t\t" << votes << "\t\t" << "(" <<
year_made << ")" << "\t" << name << endl;
}
完整的电影和电影艺术家课程:
class Movie {
public:
Movie();
Movie(string n, int y, int v, double r);
string get_name();
void set_name(string n);
int get_year();
void set_year(int y);
int get_votes();
void set_votes(int v);
double get_rating();
void set_rating(double r);
string PrintMovie();
private:
string name;
int year_made;
int votes;
double rating;
};
Movie::Movie() {
name = "null";
year_made = 0;
votes = 0;
rating = 0.0;
}
Movie::Movie(string n, int y, int v, double r) {
name = n;
year_made = y;
votes = v;
rating = r;
}
string Movie::get_name() {
return name;
}
void Movie::set_name(string n) {
name = n;
}
int Movie::get_year() {
return year_made;
}
void Movie::set_year(int y) {
year_made = y;
}
int Movie::get_votes() {
return votes;
}
void Movie::set_votes(int v) {
votes = v;
}
double Movie::get_rating() {
return rating;
}
void Movie::set_rating(double r) {
rating = r;
}
string Movie::PrintMovie() {
cout << fixed << setprecision(1) << rating << "\t\t" << votes << "\t\t" << "(" <<
year_made << ")" << "\t" << name << endl;
}
class MovieList {
public:
MovieList(int size);
~MovieList();
int Length();
bool IsFull();
void Add(Movie const& m);
string PrintAll();
private:
Movie* movies;
int last_movie_index;
int movies_size;
int movie_count = 0;
};
MovieList::MovieList(int size) {
movies_size = size;
movies = new Movie[movies_size];
last_movie_index = -1;
}
MovieList::~MovieList() {
delete [] movies;
}
int MovieList::Length() {
return last_movie_index;
}
bool MovieList::IsFull() {
return last_movie_index == movies_size;
}
void MovieList::Add(Movie const& m)
{
if (IsFull()) {
cout << "Cannot add movie, list is full" << endl;
return;
}
last_movie_index++;
movies[last_movie_index] = m;
}
string MovieList::PrintAll() {
for (int i = 0; i < last_movie_index; i++) {
movies[i].Movie::PrintMovie();
}
}
我的阵列电影是动态分配的,即电影=新电影[电影大小];。我注意到使用cout并不能解决你的问题,但如果你想做cout,那么循环中的动作[最后一部电影索引]不应该是moves[I]吗?@alexm Ahhh是的,我觉得这是个白痴。不幸的是,在第一次打印之后,它仍在崩溃。现在将要发生的是,它将打印:9.2 453500 1994《肖申克的救赎》0.0 13483293892-5963777736,然后它将在我身上崩溃。请确保您正在初始化电影类的成员。看起来选票和所做的年份并不是从肖申克的救赎输出行初始化的。如果您发布了该类的定义,那么会更容易。另外,在调用PrintMovie函数时,没有理由包含Movie::qualification。@Wescamberland我编辑了OT并发布了完整的Movie和MovieList类(如果有帮助的话)。投票结果和年份将在Shawshank Redemption(肖申克的救赎)上进行初始化,紧接着一切都会在崩溃之前失控。在另一个问题中,您已经被告知,如果您的函数返回一个值,您应该有一个返回语句。罕见的标准兼容异常:int main不必有return语句,默认为返回零。为什么?”因为——这就是原因。因此,有返回PrintAll和printmoine函数的字符串,但没有返回语句。请为并非所有返回值的路径启用并读取警告,我认为不允许嵌套函数声明。这是打字错误吗?
friend ostream& operator<<(ostream& ostr, const Movie& movie){
ostr << fixed << setprecision(1) << rating << "\t\t" << votes << "\t\t" << "(" <<
year_made << ")" << "\t" << name ;
}