14-13.cpp

来自「为初学者提供的最佳的C++程序设计源程序库」· C++ 代码 · 共 23 行

#include<fstream.h>
#include<ctype.h>
main()
{
  fstream in;
  in.open("file1.txt",ios::in);
  if(! in)
  {
    cerr<<"Error open file.";
	return(0);
  }
  fstream out;
  out.open("file2.txt",ios::out);
  if(! out)
  {
    cerr<<"Error open file.";
	return(0);
  }
  char ch;
  while ((ch=in.get())!=EOF)
    out<<char(toupper(ch));
  return 0;
}