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指针与数组
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/* | |
* 指针的标准定义方法: | |
* type *ptr; | |
* int val; int *ptr = &val; | |
* int* val; int* *ptr = &val; | |
* 所以不论几级指针都一样, 指针就是*ptr, 一级指针type是int, 二级指针type是int*, 以此类推. | |
* | |
* 同理指向数组的指针: | |
* type *ptr; | |
* int arr[10]; int *ptr = arr; | |
* int* arr[10]; int* *ptr = arr; | |
* 指向数组的指针就是*ptr, 前面加数组的数据类型, 存放int就是int *ptr, 存放int*就是int* *ptr. | |
*/ | |
#include <stdio.h> | |
int main(void) { | |
// 一级指针 | |
int val = 10; | |
int *ptr = &val; | |
// 二级指针 | |
int* pval = (int*)0x12345678; | |
int* *pptr = &pval; | |
// 指向普通数组的指针 | |
int arr[10]; | |
int *ptra = arr; | |
// 指向指针数组的指针 | |
int* parr[10]; | |
int* *pptra = parr; | |
return 0; | |
} |
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