Eclipse CDT for Windows 7无法解析任何导入

Question

所以我在学校，我们刚刚切换到C ++，因为我一直在使用eclipse，我喜欢它到目前为止我想继续使用它。我的问题是CDT不会像iostream那样解决cxx中任何最基本的导入。

#include <iostream>  // This import
#include <cstdlib>   // Nor this import are parsing they show as Unresolved imports
using namespace std;  // It says this symbol is not recognized


double underflow_double( );

float underflow_float( );

int main( )
{
    cout << underflow_float() << endl;  // cout isn't even working
    cout << underflow_double() << endl;
    return EXIT_SUCCESS;
}

double underflow_double( )
{
    double n1 = 1;
    return n1;  // more is needed here
}

float underflow_float( )
{
    float n1 = 1;
    return n1;  // more is needed here
}

我该如何解决这个问题？