动态创建数组了解各种取值和取地址的问题以及感受内存地址

简书链接:动态创建数组了解各种取值和取地址的问题以及感受内存地址
文章字数：574,阅读全文大约需要2分钟

源代码:

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include "cd.h"


//严重性	代码	说明	项目	文件	行	禁止显示状态
//错误	C4996	'scanf': This function or variable may be unsafe.Consider using scanf_s instead.To disable deprecation, 
//use _CRT_SECURE_NO_WARNINGS.See online help for details.Project1	c : \users\administrator.desktop - q7dqahs\source\repos\project1\project1\cd.c	7

void arrMemory() {
	int len=10000;
	int lenTest = 100000;
printf("var len 共有%d个字节,请输入要创建的数组容量\n", sizeof(len));
	scanf("%d", &len);
//	int*  address = calloc(len, sizeof(int));
	int*  address = calloc(len*sizeof(int));
	if (address != NULL) {
		int i = 0;
		printf("opera start %#x %#x\n", address, address[0]);
		for (; i < len; i++) {
			address[i] = rand() % 100;//从0-100以内随机
			printf(" index %d:address value %d,hex value: %#x address %#x\n", i,address[i], address[i], &address[i]);
		}
		printf("opera end  hexvalue:%#x  address: %#x\n  value 10进制:%d  16进制:%x 10进制[] %d  addressp:%p 星号取值%d", address, &address[0],address, address,address[0],address[0],*address);
		//字节输出address则输出的是地址， 
	}
	else {
		printf("内存地址申请失败\n");
	}
	

	getchar();
	getchar();
}

输出结果:

ar len 共有4个字节,请输入要创建的数组容量
10
opera start 0xf347040 0
 index 0:address value 41,hex value: 0x29 address 0xf347040
 index 1:address value 67,hex value: 0x43 address 0xf347044
 index 2:address value 34,hex value: 0x22 address 0xf347048
 index 3:address value 0,hex value: 0 address 0xf34704c
 index 4:address value 69,hex value: 0x45 address 0xf347050
 index 5:address value 24,hex value: 0x18 address 0xf347054
 index 6:address value 78,hex value: 0x4e address 0xf347058
 index 7:address value 58,hex value: 0x3a address 0xf34705c
 index 8:address value 62,hex value: 0x3e address 0xf347060
 index 9:address value 64,hex value: 0x40 address 0xf347064
opera end  hexvalue:0xf347040  address: 0xf347040
  value 10进制:255094848  16进制:f347040 10进制[] 41  addressp:00000029 星号取值41