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分享构造函数错误
#include <iostream.h>
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
sample::display()
{
cout<< i <<endl;
}
void main()
{
sample A(1000);
A.display();
}
错误提示：
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(14) : error C2556: 'int __thiscall sample::display(void)' : overloaded function differs only by return type from 'void __thiscall sample::display(void)'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(7) : see declaration of 'display'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(14) : error C2371: 'display' : redefinition; different basic types
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(7) : see declaration of 'display'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(15) : error C2065: 'i' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(20) : error C2264: 'display' : error in function definition or declaration; function not called
请问错在哪里？
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
sample::display()
{
cout<< i <<endl;
}
void main()
{
sample A(1000);
A.display();
}
错误提示：
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(14) : error C2556: 'int __thiscall sample::display(void)' : overloaded function differs only by return type from 'void __thiscall sample::display(void)'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(7) : see declaration of 'display'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(14) : error C2371: 'display' : redefinition; different basic types
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(7) : see declaration of 'display'
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(15) : error C2065: 'i' : undeclared identifier
C:\Program Files\Microsoft Visual Studio\test\hello1\hello.cpp(20) : error C2264: 'display' : error in function definition or declaration; function not called
请问错在哪里？
...全文
请发表友善的回复…
发表回复
jixiang1983 2011-02-17
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少了默认构造函数(无参数的)吧!
如果你没写构造函数,系统自动生成一个默认构造函数,但你写了构造函数后,系统将不再生成默认的构造函数!
必须加一个默认的构造函数:
sample::sample()
{
}
如果你没写构造函数,系统自动生成一个默认构造函数,但你写了构造函数后,系统将不再生成默认的构造函数!
必须加一个默认的构造函数:
sample::sample()
{
}
cntigercat 2011-02-17
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hey.
King_returns 2011-02-17
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sample::display()
{
cout<< i <<endl;
}
改为
void sample::display()
{
cout<< value <<endl;
}
{
cout<< i <<endl;
}
改为
void sample::display()
{
cout<< value <<endl;
}
奔跑的小马哥 2011-02-17
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支持二楼，公有函数display返回类型缺失
leotody 2011-02-17
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[Quote=引用 3 楼 hdt 的回复:]
最好
#include <iostream>
using namespace std;
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< i <<……
[/Quote] 2楼正解
最好
#include <iostream>
using namespace std;
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< i <<……
[/Quote] 2楼正解
ouyh12345 2011-02-17
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display的问题，跟构造函数无关
Eleven 2011-02-17
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- 举报
sample::display()
-->
void sample::display()
-->
void sample::display()
varding 2011-02-17
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display的函数体前面少了void
真相重于对错 2011-02-17
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最好
#include <iostream>
using namespace std;
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< i <<endl;
}
void main()
{
sample A(1000);
A.display();
}
#include <iostream>
using namespace std;
class sample
{
int value;
public:
sample(int i);
void display();
};
sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< i <<endl;
}
void main()
{
sample A(1000);
A.display();
}
fishion 2011-02-17
- 打赏
- 举报
class sample
{
int value;
public:
sample(int i);
void display();
};
void sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< value <<endl;
}
{
int value;
public:
sample(int i);
void display();
};
void sample::sample(int i)
{
value=i;
}
void sample::display()
{
cout<< value <<endl;
}
真相重于对错 2011-02-17
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- 举报
sample::display()
{
cout<< i <<endl;
}
===>
void sample::display()
{
cout<< i <<endl;
}
{
cout<< i <<endl;
}
===>
void sample::display()
{
cout<< i <<endl;
}
