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"> #include <stdio.h>
class c {
public:
int j;
c(void) {j=10;}
};
void PrintInt(const c* Object)
{
c* New = Object;
New->j +=5;
printf("%d/n", New->j);
}
void main(void)
{
const c Sample;
PrintInt(&Sample);
}
本文通过一个C++程序示例展示了如何使用常量指针来修改类成员变量,并探讨了这样做可能带来的问题。代码中定义了一个简单的类`c`,包含一个公共整型成员变量`j`和一个构造函数初始化该变量。通过`PrintInt`函数尝试修改通过常量引用传递的类实例的成员变量。

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