如何使用堆棧推送方法而不是int數據類型的類

Question

我有一個簡單的問題，我需要一個提示。

我有一個這樣的程序：

#include <iostream> 
#include <string> 
#include <stack> 

using namespace std; 

stack<int> stack1; 

int main() { 
    stack1.push(11); 
    cout << stack1.top() << endl; 
    system("Pause"); 
    return 0; 
} 

這是工作完美：

但我需要使用的int一類/結構來代替，這是不工作得很好。

#include <iostream> 
#include <string> 
#include <stack> 

using namespace std; 

struct player { 
    string name; 
    string surname; 
    int age; 
}; 

stack<player> stack1; 

int main() { 
    stack1.push("Zlatan","Ibrahimovic",11); //I do not know how to do it properly. 
    cout << stack1.top() << endl; 
    system("Pause"); 
    return 0; 
} 

錯誤在Visual Studio：

Answer 1

您需要構建你player結構的實例之前，您就可以將其推入堆棧。

另外，operator<<不知道如何在默認情況下流式傳輸player結構，因此您需要重載operator<<以自行提供該功能。

如果您使用版本的C++之前，C++ 11，試試這個：如果您使用的是C++ 11或更高版本

#include <iostream> 
#include <string> 
#include <stack> 
#include <cstdlib> 

struct player 
{ 
    std::string name; 
    std::string surname; 
    int age; 

    player(const std::string &name, const std::string &surname, int age) 
     : name(name), surname(surname), age(age) 
    { 
    } 

    void print(std::ostream &out) const 
    { 
     out << "Name: " << name << " " << surname << ", Age: " << age; 
    } 
}; 

std::ostream& operator<<(std::ostream &out, const player &p) 
{ 
    p.print(out); 
    return out; 
} 

std::stack<player> stack1; 

int main() 
{ 
    stack1.push(player("Zlatan", "Ibrahimovic", 11)); 
    std::cout << stack1.top() << std::endl; 
    std::system("Pause"); 
    return 0; 
} 

Live Demo

，試試這個來代替：

#include <iostream> 
#include <string> 
#include <stack> 
#include <cstdlib> 

struct player 
{ 
    std::string name; 
    std::string surname; 
    int age; 

    void print(std::ostream &out) const 
    { 
     out << "Name: " << name << " " << surname << ", Age: " << age; 
    } 
}; 

std::ostream& operator<<(std::ostream &out, const player &p) 
{ 
    p.print(out); 
    return out; 
} 

std::stack<player> stack1; 

int main() 
{ 
    stack1.push(player{"Zlatan", "Ibrahimovic", 11}); 
    std::cout << stack1.top() << std::endl; 
    std::system("Pause"); 
    return 0; 
} 

Live Demo

或者：

#include <iostream> 
#include <string> 
#include <stack> 
#include <cstdlib> 

struct player 
{ 
    std::string name; 
    std::string surname; 
    int age; 

    player(const std::string &name, const std::string &surname, int age) 
     : name(name), surname(surname), age(age) 
    { 
    } 

    void print(std::ostream &out) const 
    { 
     out << "Name: " << name << " " << surname << ", Age: " << age; 
    } 
}; 

std::ostream& operator<<(std::ostream &out, const player &p) 
{ 
    p.print(out); 
    return out; 
} 

std::stack<player> stack1; 

int main() 
{ 
    stack1.emplace("Zlatan", "Ibrahimovic", 11); 
    std::cout << stack1.top() << std::endl; 
    std::system("Pause"); 
    return 0; 
} 

Live Demo