call_3.cpp
来源：互联网 发布：华为外包java面试题 编辑：程序博客网 时间：2024/06/11 15:23
<iframe name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"></iframe> #include <iostream.h>
#include <iomanip.h>
void call_by_value(int a, int b, int c)
{
a = 3; b = 2; c = 1;
}
void call_by_pointer_reference(int *a, int *b, int *c)
{
*a = 3; *b = 2; *c = 1;
}
void call_by_reference(int& a, int& b, int& c)
{
a = 1; b = 2; c = 3;
}
void main(void)
{
int a = 1, b = 2, c = 3;
int& a_alias = a;
int& b_alias = b;
int& c_alias = c;
call_by_value(a, b, c);
cout << "By value: " << a << b << c << '/n';
call_by_pointer_reference(&a, &b, &c);
cout << "By pointer: " << a << b << c << '/n';
call_by_reference(a_alias, b_alias, c_alias);
cout << "By reference: " << a << b << c << '/n';
}
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