I am using Dev-C++ with boost lambda expression, I wrote:

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

int nnumber;

int switchvalue;

typedef std::map<int, int> IIPrimemap;

IIPrimemap primemapvec;

 # define BetaKGre2   1
 # define EqualToOne  2
 #define  ProductOfKPrime  3

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

  if_then_else(var(nnumber)==1,var(switchvalue)=EqualToOne,
  if_then_else(constant(count_if(primemapvec.begin(),primemapvec.end(),
       bind(&IIPrimemap::value_type::second,_1)>2)>0),
        var(switchvalue)=BetaKGre2,var(switchvalue)=ProductOfKPrime));
  std::cout<<" the var(switchvalue) is  "<<var(switchvalue)<<"\n"; 

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

and the program ran and showed:

the var(switchvalue) is 

 

without any expression of var(switchvalue).

I do not know how to save the values in lambda expression and where is wrong?

Can I use *var(switchvalue) instead of var(switchvalue)?

Can anyone with kindness help me?