您好,我想完成我的作业。当我尝试分离一个类时,我有一个编译错误,然后再调用它。但整个测试功能正常。它在整个文本中都有类。基本上当我尝试将类与文本分开时,我有一条错误消息。
#include <iostream>
#include<string>
using namespace std;
class Person
{
private:
string alpha;
int beta;
public:
Person(string Name, int Age)
{
alpha = Name;
beta = Age;
}
string getName()
{
return alpha;
}
int getAge()
{
if (beta < 0)
{ beta = 0;
cout << "Error. A negative age cannot be entered. " << endl;
}
if (beta > 120)
{
cout << "Damn you're old. How many heart transplants have you had? You Vampire " << endl;
}
return beta;
}
void setName(string alpha)
{
}
void setAge(int beta);
void display();
};
int main()
{
Person Lu("Jess ", 22);
Person Rose("Gary ", 49);
cout << Lu.getAge() << " " << Lu.getName() <<endl;
cout << Rose.getAge() << " " << Rose.getName() << endl;
return 0;
}`
但是当我把课程分开时,:
#include <iostream>
#include <string>
class Person
{
private:
string alpha;
int beta;
public:
Person(string Name, int Age)
{
alpha = Name;
beta = Age;
}
string getName()
{
return alpha;
}
int getAge()
{
if (beta < 0)
{ beta = 0;
cout << "Error. A negative age cannot be entered. " << endl;
}
if (beta > 120)
{
cout << "Damn you're old. How many heart transplants have you had? You Vampire " << endl;
}
return beta;
}
void setName(string alpha)
{
}
void setAge(int beta);
void display();
};
主档
#include <iostream>
#include "Person.h"
#include <string>
using namespace std;
int main()
{
Person Lu("Jess ", 22);
cout << Lu.getAge() << " " << Lu.getName() <<endl;
return 0;
}`
但是当我分开这个类时,我在codeblocks中遇到错误。请帮忙。
答案 0 :(得分:1)
您忘了将using namespace std;
放在Person.h中。
另外,你在Person.h上没有任何标题保护,这在一个简单的程序中不会引起问题,但是只要多个文件包含Person.h就会出现。