please someone give detail of the program line byline,as i cant understand it,i am...

[imported_Rohan]

...a student,help me please? include<iostream>
using namespace std;

int abslt(int );
long abslt(long );
float abslt(float );
double abslt(double );

int main()
{

int intgr=-5;
long lng=34225;
float flt=-5.56;
double dbl=-45.6768;
cout<<" absoulte value of "<<intgr<<" = "<<abslt(intgr)<<endl;
cout<<" absoulte value of "<<lng<<" = "<<abslt(lng)<<endl;
cout<<" absoulte value of "<<flt<<" = "<<abslt(flt)<<endl;
cout<<" absoulte value of "<<dbl<<" = "<<abslt(dbl)<<endl;
}
int abslt(int num)
{
if(num>=0)
return num;
else
return (-num);
}
long abslt(long num)
{
if(num>=0)
return num;
else return (-num);
}
float abslt(float num)
{
if(num>=0)
return num;
else return (-num);
}
double abslt(double num)
{
system("PAUSE");
if(num>=0)
return num;
else return (-num);
}