demo1

打印内存地址

int array[10] = {1,2,3};//for (int i = 0; i < array.length; i++) {for (int i = 0; i < sizeof(array) / sizeof(array[0]); i++) {	cout << "array[" << i << "].address=" << &array[i] << endl;}

array[0].address=00CFF7F0
array[1].address=00CFF7F4
array[2].address=00CFF7F8
array[3].address=00CFF7FC
array[4].address=00CFF800
array[5].address=00CFF804
array[6].address=00CFF808
array[7].address=00CFF80C
array[8].address=00CFF810
array[9].address=00CFF814

从上面可以看出每个int占用4个字节

demo2

int array1[] {1,3,5,7,9,11};        int* p1 = array1;    int i = 0;    cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl;    i=i+1;    p1 = p1+1;    cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl;    i=i+1;    p1 = p1+1;    cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl; i=i+1; p1 = p1+1; cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl; i=i+1; p1 = p1+1; cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl; i=i-1; p1 = p1-1; cout<< "p1["<<<"]=" << *p1 << ",address["<<<"]=" << p1<< endl;

p1[0]=1,address[0]=0x7ffeefbff4b0

p1[1]=3,address[1]=0x7ffeefbff4b4

p1[2]=5,address[2]=0x7ffeefbff4b8

p1[3]=7,address[3]=0x7ffeefbff4bc

p1[4]=9,address[4]=0x7ffeefbff4c0

p1[3]=7,address[3]=0x7ffeefbff4bc

数组名称

多数情况下，c++将数组名解释为数组的第1个元素的地址。

// c++11int array1[] {1,3,5,7,9,11};    cout << "array1[0].addess=" << array1 << endl;cout << "array1[0].addess=" << &array1[0] << endl;# 最初的时候，下面的地址是一样的array1 == &array1[0]

array1[0].addess=0x7ffeefbff4b0

array1[0].addess=0x7ffeefbff4b0

总结

p1和*p1，前者是地址，后者是存储在该地址的值。由于p1指向第1个元素，因此*p1显示的值为第1个元素的值，即1.

接下来将p1加1.这样p1的值为第2个元素的地址。因此，*p1现在的值是3.

以此类推。

C99

int array1[6] = {[3]=10};printf("=======================================\n");for(int i=0;i< sizeof(array1)/sizeof(array1[0]);i++) {     printf("array1[%d]=%d \n",i,array1[i]);}