vs2010引用iostream问题,求助!
#include <stdio.h>

#include <iostream>
using namespace std;

int main()
{
return 0;
}

编译错误100多个..好象和引用iostream有关
不引用下在2行代码就编译通过
#include <iostream>
using namespace std;


错误1error C2061: 语法错误: 标识符“acosf”c:\program files\microsoft visual studio 10.0\vc\include\cmath191test
错误2error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath191test
错误3error C2061: 语法错误: 标识符“asinf”c:\program files\microsoft visual studio 10.0\vc\include\cmath191test
错误4error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath191test
错误5error C2061: 语法错误: 标识符“atanf”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误6error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误7error C2061: 语法错误: 标识符“atan2f”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误8error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误9error C2061: 语法错误: 标识符“ceilf”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误10error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath201test
错误11error C2061: 语法错误: 标识符“cosf”c:\program files\microsoft visual studio 10.0\vc\include\cmath211test
错误12error C2059: 语法错误:“;”c:\program files\microsoft visual studio 10.0\vc\include\cmath211test
错误13error C2061: 语法错误: 标识符“coshf”c:\program files\microsoft visual studio 10.0\vc\include\cmath211test


[解决办法]
到底是c还是c++？c哪来的iostream
[解决办法]