void readTxt(string file) ifstream infile; infile.open(file.data()); //将文件流对象与文件连接起来 assert(infile.is_open()); //若失败,则输出错误消息,并终止程序运行 char c; while (!infile.eof()) { infile >> c; cout<<c<<endl; } infile.close(); //关闭文件输入流 } 3. 逐个字符...
read ( char * buffer, streamsize size ); 这里buffer 是一块内存的地址,用来存储或读出数据。参数size 是一个整数值,表示要从缓存(buffer)中读出或写入的字符数。 // reading binary file #include <iostream> #include <fstream.h> constchar* filename = "test.txt"; intmain () { char* buffer; lo...
有些C编译系统可能不完全提供所有这些功能,有的C版本不用"r+","w+","a+",而用"rw","wr","ar"等,读者注意所用系统的规定。 文件使用方式由r,w,a,t,b,+六个字符拼成,各字符的含义是: r(read): 读 w(write): 写a(append): 追加 t(text): 文本文件,可省略不写b(banary): 二进制文件 +: ...
readFromFile.read(reinterpret_cast<char*>(&client),sizeof( ClientData) );// copy all records from record file into text filewhile(!readFromFile.eof() )// While not the end of file{// Write single record to text fileif(client.getAccountNumber() !=0)// skip empty recordsoutputLine(outP...
inline const GLchar* readTextFile(const char* filename) { std::fstream shaderFile(filename,std::ios::in); std::string shader; std::stringstream buffer; buffer << shaderFile.rdbuf(); shader = buffer.str(); return shader.c_str(); } Any tips on troubleshooting this? many thanks in ...
// reading a text file #include <iostream.h> #include <fstream.h> #include <stdlib.h> int main () { char buffer[256]; ifstream examplefile ("example.txt"); if (! examplefile.is_open()) { cout << "Error opening file"; exit (1); } ...
// reading a text file #include <iostream.h> #include <fstream.h> #include <stdlib.h> int main () { char buffer[256]; ifstream examplefile ("example.txt"); if (! examplefile.is_open()) { cout << "Error opening file"; exit (1); } ...
它们的原型是:write ( char * buffer, streamsize size );read ( char * buffer, streamsize size ); 这里 buffer 是一块内存的地址,用来存储或读出数据。参数size 是一个整数值,表示要从缓存(buffer)中读出或写入的字符数。cpp view plaincopyprint?1. /readingbinaryfile2. #include3. #include4. 5. ...
在C+中,对文件的操作是通过stream的子类fstream(file stream)来实现的,所以,要用这种方式操作文件,就必须加入头文件fstream.h。下面就把此类的文件操作过程一一道来。 一、打开文件 在fstream类中,有一个成 3、员函数open(),就是用来打开文件的,其原型是: void open(const char* filename,int mode,int ...
ifstream in (filename, ios::in|ios::binary|ios::ate); size = in.tellg(); in.seekg (0, ios::beg); buffer =newchar[size]; in.read (buffer, size); in.close(); cout << "the complete file is in a buffer"; delete[] buffer; ...