入门问题，但是搞不定

ogen

简单程序，在cygwin下编译：
#include <iostream>
#include <fstream>
#include <string>
int main(void){
  ofstream out("outfile");
  string word;
  ......
  ......
  return 0;
}
编译结果是：
iobasic.cc: In function `int main()':
iobasic.cc:5: error: `ofstream' undeclared (first use this function)
iobasic.cc:5: error: (Each undeclared identifier is reported only once for each
function it appears in.)
iobasic.cc:5: error: expected `;' before "out"
iobasic.cc:6: error: `string' undeclared (first use this function)
iobasic.cc:6: error: expected `;' before "word"
以上各个头文件都可以在\usr\include\c++\3.3.3里找得到，为什么还是不行，这是编译错误并不是连接错误，显然它是说明头文件没有正确读取，请各位高手示下～～～～～～～

cmh_2003

ofstream out("outfile");
这句啥意思啊

liubinbj

using namespace std;

ogen

解决

gooderfeng

ofstream out("outfile");
输出流啊。