来个C++大神解答下简单问题啊
利用创建win32控制台源程序编制计算圆面积的代码 提示:
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/m_source.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.
这是什么意思啊?
具体代码如下:
#include <stdlib.h>
#include <iostream>
using namespace std;
class circle
{
public:
double m_s;
double m_r;
public:
void setR(double r)
{ m_r=r;
}
double getR()
{
return m_r;
}
double getS()
{
m_s=3.14*m_r*m_r;
return m_s;
}
};
void main01()
{
circle c1;
double r;
cout <<"请输入圆的半径:"<< endl;
cin >>r;
c1.setR(r);
cout <<"c1圆的面积是:"<<c1.getS()<<endl;
system("pause");
}