void DataRead_CPPMode() { double pos[200]; ifstream f("binary.dat", ios::binary); if(!f) { cout << "读取文件失败" <<endl; return; } f.read((char*)pos,200*sizeof(double)); for(int i = 0; i < 200; i++) cout << pos[i] <<endl; f.close(); }--六...
void DataRead_CPPMode() double pos200; ifstream f("binary.dat", ios::binary); if(!f) cout << "读取文件失败" <<endl; return; f.read((char*)pos,200*sizeof(double)); for(int i = 0; i < 200; i++) cout << pos <<endl; f.close(); 六 总结 1. C语言读写文件均通过FILE指...
int main() { ifstream ifd("input.png",ios::binary |ios::ate); int size = ifd.tellg(); ifd.seekg(0, ios::beg); vector<char> buffer; buffer.reserve(size); ifd.read(buffer.data(), size); cout << buffer.data(); return 0; } 我认为如果我计算缓冲区,我会得到二进制结果,但事实...
inF.open("data.bin", std::ifstream::binary);//以二进制格式打开文件inF.seekg(0, ios::end);//将输入指针指向文件末尾length = inF.tellg();//获取当前指针位置cout <<"the length of the file is"<< length <<""<<"byte"<<endl; unsignedchar* data =newunsignedchar[length]();//读取文件数...
//int readBinFile(std::string& filename, void*& bufPtr, int& pointNum, int pointDim) int main() { // open the file: std::streampos fileSize; //实例化fpos用于表示窄向流中的位置。 std::ifstream file("/home/oem/CLionProjects/untitled/a.bin", std::ios::binary); ...
ifstreamfile2("c:\\pdos.def");//以输入方式打开文件ofstreamfile3("c:\\x.123");//以输出方式打开文件 所以,在实际应用中,根据需要的不同,选择不同的类来定义: 如果想以输入方式打开,就用ifstream来定义; 如果想以输出方式打开,就用ofstream来定义; ...
//采用CPP模式读二进制文件 void DataRead_CPPMode() { double pos[200]; ifstream f("binary.dat", ios::binary); if(!f) { cout << "读取文件失败" <<endl; return; } f.read((char*)pos,200*sizeof(double)); for(int i = 0; i < 200; i++) cout << pos[i] <<endl; f.close...
我就是这样读取文件的: std::ifstream input; input.open(filename.c_str(), std::ios::in | std::ios::binary); if (!input.is_open()) return false; uint32_t buffer[262144]; input.read((char*)buffer, 1048576); 我需要转换缓冲区的e 浏览4提问于2014-04-18得票数 1 回答已采纳 4回答 ...
void DataRead_CPPMode() { double pos[200]; ifstream f("binary.dat", ios::binary); if(!f) { cout << "读取文件失败" <return; } f.read((char*)pos,200*sizeof(double)); for(int i = 0; i < 200; i++) cout << pos[i] <f.close(); ...
void TxtRead_Cmode(){ FILE * fid = fopen("txt_out.txt","r");if(fid == NULL){ printf("打开%s失败","txt_out.txt");return;} vector<int> index;vector<double> x_pos;vector<double> y_pos;int mode = 1;printf("mode为1，按字符读⼊并输出；mode为2，按⾏读⼊输出；mode为3，...