ProPriceTemp, C++ (gcc)

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//g++  7.4.0
//ProPriceTemp: example of template stack and array
//this code is created by Rezaul Hoque on May 13,2022;
//contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;
#include <iostream>
#include <string>
namespace Banner{
template<class T>
class Deco{
T* item;
int up;
int sz;
public:
Deco(int len){sz=len; item= new T[sz];}
~Deco(){delete [] item;}
void add(const T&  a){ item[++up]=a;}
void message(){std::cout<<"\nExample of Template Stack & Array\n";}
T getIt(){return item[up--];}
};
}
namespace ProdPrice{
template<class X, class Y>
class Prod{
X* p;
Y* p2;
int size;
public:
Prod(X a[], Y c[]);
void display(X a[],Y c[]);

};
template<>
Prod<std::string,float>::Prod(std::string a[],float c[]){
int size= 5;
p=new std::string[size];
for(int k= 0;k<size;k++)
p[k]=a[k];

p2=new float[size];
for(int k= 0;k<size;k++)
p2[k]=c[k];
}
template<>
void Prod<std::string,float>::display(std::string a[],float c[]){
int size=5;
for(int k= 0;k<size;k++){
std::cout<<*(a+k)<<"\t";
std::cout<<*(c+k)<<" \n";}
}
}

int main()
{
    Banner::Deco<char> s(25);

s.message ();
for (int h=0;h<25;h++){
  s.add('~');
}
for (int h=0;h<25;h++){
  std::cout<<s.getIt();
}
int size=5;
std::string a[5]={"\nRice","Lentil","Oil","Potato","Chicken"};
float c[5]={58,60,180,25,165};
ProdPrice::Prod<std::string,float> f(a,c);
f.display(a,c);
return 0;
}

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Compilation time: 0.52 sec, absolute running time: 0.2 sec, cpu time: 0.02 sec, memory peak: 6 Mb, absolute service time: 0,9 sec