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aboutmem.cpp
Package: C.zip [view]
Upload User: gzy2011
Upload Date: 2021-02-09
Package Size: 20k
Code Size: 1k
Category:
Compress-Decompress algrithms
Development Platform:
Visual C++
- //file aboutmem.cpp
- //
- #include"iostream.h"
- #include"memory.h" //p128:"mem.h"
- void main(void)
- {
- int a[50];
- memset(a,1,50*sizeof(int));
- //数组每个元素占4个字节,数组(每个元素中的)每个字节的值设为1
- //所以每个元素的值(二进制)为:00000001 00000001 00000001 00000001
- //即每个元素值的16进制表示为:01 01 01 01
- //函数原型void *memset(void*,int,unsigned);
- //它把数组的起始地址作为其第一个参数,第二个参数是设置数组每个字节的值
- //,不是每个元素的值。
- //int占4字节,第三个参数是数组的长度(字节数,不是元素个数)。
- for(int i=1;i<=50;i++){
- cout<<"hex:"<<hex<<a[i-1]<<" "; //指定以16进制输出
- if(i%5==0) cout<<endl; //控制每行输出5个
- }
- cout<<"对应的10进制值:"<<dec<<(1+256+256*256+256*256*256);//对应的10进制数值
- cout<<endl;
- }