下面代码因为T2没有实现T2(T1)复制构造函数,所以编译错误
g++报错:test.cpp|23 col 25| 错误: 对‘T2::T2(T1&)’的调用没有匹配的函数
#include <vector>
#include<stdio.h>
#include <string.h>
#include<iostream>
#include <string>
using namespace std;
class T1{
public:
int a;
double b;
};
class T2{
public:
int a;
double b;
};
int main()
{
T1 t1;
t1.a = 2, t1.b = 1.5;
T2 t2 = static_cast<T2>(t1);
return 0;
}
类之间不能用reinterpret_cast转换,尽管定义了T2(T1&)也出错:
G++报错:test.cpp|27 col 33| 错误: 从类型‘T1’到类型‘T2’的转换无效
#include <vector>
#include<stdio.h>
#include <string.h>
#include<iostream>
#include <string>
using namespace std;
class T1{
public:
int a;
double b;
};
class T2{
public:
T2(T1& t1)
{
a = t1.a;
b = t1.b;
}
int a;
double b;
};
int main()
{
T1 t1;
t1.a = 2, t1.b = 1.5;
T2 t2 = reinterpret_cast<T2>(t1);
return 0;
}