open改为ofs.open(name, std::ios::out | std::ios::binary);就对了！原因应该是ofstream打开⽂件时默认是⽂本格式吧。。。void open(const char *_Filename,ios_base::openmode _Mode = ios_base::out,int _Prot = (int)ios_base::_Openprot );void open(const char *_Filename,ios_base::...
std::ofstream ofs; ofs.open(name); ASSERT(ofs.good()); ofs.write(buffer, size); ASSERT(ofs.good()); ofs.close(); .xml,.lua,等文本都是对的,唯独.jpg这些图片些不对! open改为ofs.open(name, std::ios::out | std::ios::binary); 就对了! 原因应该是ofstream打开文件时默认是文本格式吧...
std::ofstream ofs; ofs.open(name); ASSERT(ofs.good()); ofs.write(buffer, size); ASSERT(ofs.good()); ofs.close(); .xml,.lua,等文本都是对的,唯独.jpg这些图片些不对! open改为ofs.open(name, std::ios::out | std::ios::binary); 就对了! 原因应该是ofstream打开文件时默认是文本格式吧...
要在所有平台上获得相同的结果，您需要在binary模式下打开文件以禁用换行符转换，例如：
我们经常使用ofstream或者fstream可写文件，使用ifstream可以写文件，但需要设置文件的打开状态为ios::out。
#include <fstream> #include <complex> int main() { std::complex<double> complexNum(3.0, 4.0); // 创建一个std::复数对象 std::ofstream file("complex.bin", std::ios::binary); // 打开二进制文件 file.write(reinterpret_cast<const char*>(&complexNum), sizeof(complexNum)); // 将...
std::ofstreamstream("test_stream_write", std::ios::binary); stream.write(buffer, BUFFER_SIZE); 启动了分析器。似乎stream在xsputn函数中花费了大量时间,而实际的write调用具有相同的持续时间(应该是相同的函数…) 1 2 3 4 5 6 Running Time Self Symbol Name ...
std::ifstream fileInputHandle("f:/192.168.12.3_1_DaHua_004316fc47073c-0c71-4087-8070-7793181e8fb6.sy", std::ios::binary); std::ofstream fileOutputHandle("f:/output.h264", std::ios::binary | std::ios::trunc); //获取文件长度 fileInputHandle.seekg(0, std::ios::end); int nFi...
std::ofstream 如果已有文件,清空,没有创建 std::ofstream fHandle;fHandle.open("D:/test.txt",std::ios::in|std::ios::binary|std::ios::trunc);charszBuffer[]={"Welcome to https://blog.51cto.com/fengyuzaitu"};fHandle.write(szBuffer,sizeof(szBuffer));fHandle.close(); ...
#include<iostream>#include<fstream>#include<string>#include<unistd.h>intmain(){std::stringstr("Hello World");std::ofstreamfs("path",std::ofstream::binary|std::ofstream::out|std::ofstream::in);if(!fs.is_open())fs.open("path",std::ofstream::binary|std::ofstream::out);autohelper=[]...