在VS8里面 fatal error C1083: 无法打开包括文件:“iostream.h”: No such file or directory

fatal error C1083: 无法打开包括文件:<iostream.h>: No such file or directory

把#include<iostream.h>

改成

#include<iostream.h>
using namespace std;  后

出现这样的错误

d:\program files\microsoft visual studio 9.0\vc\include\cstdio(39) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(39) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(41) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(42) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(43) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(44) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2059: 语法错误 : “:”
d:\program files\microsoft visual studio 9.0\vc\include\cstdio(45) : error C2143: 语法错误 : 缺少“{”(在“:”的前面)

....................................

是怎么回事儿呢？

#include<iostream> 
using namespace std;