舉個例子吧：

class base1{

int x;

public:

base1(int a){x = a;}

};

//單繼承

class derived1: public base1{

int a;

public:

derived1(int m, int n): base1(m){ //依次呼叫基類的建構函式，然後再是派生類的建構函式

a = n;

}

};

class base2{

int t;

public:

base2(int p){t = p;}

};

//多繼承

class derived2: public base1,public base2{

int k;

public:

derived2(int x, int y, int z): base1(x),base2(y){ //依次呼叫基類建構函式，用逗號隔開，末尾沒有分號

k = z;

}

};