我们从一个简单的程度開始:
//
// main.cpp
// Pointers
//
//
// Copyright © 2016 GavinPSU. All rights reserved.
//
#include <iostream>
using namespace std;
int dog,cat,bird,fish;
void f(int pet){
cout<<"pet id number: "<<pet<<endl;
}
int main(int argc, const char * argv[]) {
// insert code here...
int i,j,k;
cout<<"f(): "<<(long)&f<<endl;
cout<<"dog: "<<(long)&dog<<endl;
cout<<"cat: "<<(long)&cat<<endl;
cout<<"bird: "<<(long)&bird<<endl;
cout<<"fish: "<<(long)&fish<<endl;
cout<<"i: "<<(long)&i<<endl;
cout<<"j: "<<(long)&j<<endl;
cout<<"k: "<<(long)&k<<endl;
return 0;
} ///:~
执行一次的结果例如以下:
f(): 4294971184
dog: 4294975680
cat: 4294975684
bird: 4294975688
fish: 4294975692
i: 140734799804284
j: 140734799804280
k: 140734799804276
我们能够看到
在main()内部和外部定义的变量存放在不同区域。
同一时候,在内存中代码和数据是一般分开存放的
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