#include <fstream> // ifstream, ifstream::in
using namespace std;
int main(){
// 1. 打开图片文件
// 评论区的 @霍鑫网络 帮忙发现一个隐藏的bug,在此表示感谢,已经修正
ifstream is("test.jpg", ifstream::in | ios::binary);
// 2. 计算图片长度
is.seekg(0, is.end);
int length = is.tellg();
is.seekg(0, is.beg);
// 3. 创建内存缓存区
char * buffer = new char[length];
// 4. 读取图片
is.read(buffer, length);
// 到此,图片已经成功的被读取到内存(buffer)中
//https://www.coder.work/article/1711506
//https://stackoverrun.com/cn/q/8220469
delete [] buffer;
return 0;
}
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <io.h>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
string strpath = "D:\\Dtest5\\Readjpg\\1.jpg";
string strR1 = "D:\\Dtest5\\Readjpg\\10.jpg";
std::ifstream fin(strpath.c_str(), std::ios::binary);
fin.seekg(0, ios::end);
int iSize = fin.tellg();
char* szBuf = new (std::nothrow) char[iSize];
fin.seekg(0, ios::beg);
fin.read(szBuf, sizeof(char) * iSize);
fin.close();
std::ofstream fout(strR1.c_str(), std::ios::binary);
fout.write(szBuf, sizeof(char) * iSize);
fout.close();
return 0;
}
标签:std,读取,int,ios,char,opencv,cpp,include,fin
From: https://www.cnblogs.com/xypf/p/18035031