const引用和非const引用.txt

来自「里面的代码是自己写的,参考书是thingking in c++,代码有详细的说明」· 文本 代码 · 共 20 行

/*本程序选自thinking in c++ P453
* 本程序在于说明：Temporary objects are always const,so if you don't use
* a const reference instead of a nomal reference, that argument won't be
* accepted by the compiler. 
*/
#include <iostream>

void f( int& ) {}
void g( const int & ){}

void mian()
{
	//f(1);   //error,临时变量不能传给非const引用。
	g(1);
	g(2.678);
	float ff = 100.001;
	//f(ff);   //error C2664: “f” : 不能将参数 1 从“float”转换为“int &”
    g( ff );
	
}