问题描述
我对以下示例代码有几个问题：
I have a few questions on the example code below :
#include <iostream>
using namespace std;
class Example
{
int a;
public:
void setval(int x);
int addval(Example &ex);
};
void Example::setval(int x)
{
a=x;
}
int Example::addval(Example &ex)
{
int c;
c=ex.a+a;
return c;
}
int main()
{
Example obj1,obj2;
int sum;
obj1.setval(10);
obj2.setval(20);
sum=obj1.addval(obj2);
cout<<" the sum is :"<<sum<<endl;
}
Output :
$g++ -o main *.cpp
$main
the sum is :30
问题：
1>当行sum = obj1.addval（obj2）;执行，函数堆栈是什么样的？
1.a>在通过obj1调用addval（obj2）时，obj1.addval的堆栈是否包含变量obj2.a的内存地址？
2>变量c的范围是多少？
3> ca成员是变量吗？
我尝试过：
如果我无法澄清我的问题，请说出来。
预先感谢您的回复。
问候！
Questions:
1> When the line sum=obj1.addval(obj2); executes, what does the function stack look like?
1.a> in the call to addval(obj2) by obj1, does the stack of obj1.addval contain the memory address of the variable obj2.a ?
2> What is the scope of the variable c ?
3> Is c a member variable ?
What I have tried:
If I have not been able to make my question clear, please say so.
Thanks in advance for your responses.
Regards!
推荐答案
问题：
1>当行sum = obj1.addval（obj2）;执行，函数堆栈是什么样的？
1.a>在通过obj1调用addval（obj2）时，obj1.addval的堆栈是否包含变量obj2.a的内存地址？
2>变量c的范围是多少？
3> ca成员是变量吗？
我尝试过：
如果我无法澄清我的问题，请说出来。
提前感谢您的回复。
问候！
Questions:
1> When the line sum=obj1.addval(obj2); executes, what does the function stack look like?
1.a> in the call to addval(obj2) by obj1, does the stack of obj1.addval contain the memory address of the variable obj2.a ?
2> What is the scope of the variable c ?
3> Is c a member variable ?
What I have tried:
If I have not been able to make my question clear, please say so.
Thanks in advance for your responses.
Regards!
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