十分简单 知道就行

[] [c++]
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#include<bits/stdc++.h>
using namespace std;

class Person
{
public:
// 传统
//Person(int a,int b,int c)
//{
// m_A=a;
// m_B=b;
// m_C=c;
//}
Person(int a,int b,int c):m_A(a),m_B(b),m_C(c){}

int m_A;
int m_B;
int m_C;
};


void test01()
{
//Person p(10,20,30); 传统
Person p(10,20,30);
cout<<"m_A为"<<p.m_A<<endl;
cout<<"m_B为"<<p.m_B<<endl;
cout<<"m_C为"<<p.m_C<<endl;
}


int main()
{
test01();
return 0;
}