Templates-C++

Class Template


Q) Write a C++ object program to sort the contents of an array storing data of any type (eg. Int, float and double) using class templates. The class should include following member functions.
i) A member function to input the values for the array.
ii) A member function to output the contents of the array.
iii) A member function that sorts the array contents.

Ans) #include<iostream.h>
#include<stdio.h>
#include<conio.h>
template <class T>class bsort{
private:
T *p;
int size;
public:
bsort(){
cout<<"Enter how many numbers you want to sort";
cin>>size;
p=new T[size];
}
void input(){
for(int i=0;i<size;i++){
cout<<"Enter the next element\n";
cin>>p[i];
}
}
void display(){
for(int i=0;i<size;i++)
cout<<"\n"<<p[i];
}
void sort(){
int ex=1;
T temp;
while(ex!=0){
ex=0;
for(int i=0;i<size-1;i++){
for(int j=i+1;j<size;j++)
if(p[i]>p[j])
{
temp=p[i];
p[i]=p[j];
p[j]=temp;
ex++;
}
}
}
}
};
void main()
{
bsort<int>b1;
b1.input();
b1.sort();
b1.display();
bsort<float>b2;
b2.input();
b2.sort();
b2.display();
bsort<double>b3;
b3.input();
b3.sort();
b3.display();
getch();
}

I'm getting 9 warnings saying (Functions containing for(loop) are not expanded inline)..Could you tell me Why this 9 warnings are shown…and please help me to rectify my problem…

Your compiler is set to expand functions in-line when it can, it is merely warning you that it cannot expand these particular functions. When I compile this on VC++6.0, I generate no warnings in debug mode, but that is set to disable in-line function expansion, so technically you have no problem.

It works, right? Although you do get undefined input behavior when the input expects a float and gets an int...

I assume this was a homework problem, right? I wonder why they are not teaching the new standard for headers...
<iostream> instead of <iostream.h> for example...

Oh no, I see, it is waiting for the getch() before doing the last display. If you do this:

#include<iostream>
#include<stdio.h>
#include<conio.h>

using namespace std;

it displays the 3rd sort before waiting for the getch()