template c++
#include <iostream>
using namespace std;
// One function works for all data types. This would work
// even for user defined types if operator '>' is overloaded
template <typename T>
T myMax(T x, T y)
{
return (x > y)? x: y;
}
int main()
{
cout << myMax<int>(3, 7) << endl; // Call myMax for int
cout << myMax<double>(3.0, 7.0) << endl; // call myMax for double
cout << myMax<char>('g', 'e') << endl; // call myMax for char
return 0;
}Source: www.geeksforgeeks.org
what is a template in c++
A template is a simple and yet very powerful tool in C++. The simple idea is to pass data type as a parameter so that we don’t need to write the same code for different data types. For example, a software company may need sort() for different data types. Rather than writing and maintaining the multiple codes, we can write one sort() and pass data type as a parameter. C++ adds two new keywords to support templates: ‘template’ and ‘typename’. The second keyword can always be replaced by keyword ‘class’.
how to write a template c++
template <class myType>
myType GetMax (myType a, myType b) {
return (a>b?a:b);
}Source: www.cplusplus.com
template c++
template <class identifier> function_declaration;
template <typename identifier> function_declaration;
//Example:
template <class Type>
void Swap( Type &x, Type &y)
{
Type Temp = x;
x = y;
y = Temp;
}
c++ template
template <class T>
class mypair {
T values [2];
public:
mypair (T first, T second)
{
values[0]=first; values[1]=second;
}
};Source: www.cplusplus.com
C++ template function
/*
C++ template functions are an alternamive way to write a function that
can take different data types. C++ Template functions are only one
function, so if you need to make a change, then it only has to be done
once. Here is an example of a 'get_doubled' templated function:
*/
#include <iostream>
using namespace std;
template <typename T> // Now, T is a type of variable, for this scope:
void say_something(T input) {
cout << input << "\n";
}
int main(void) {
say_something(45); // Uses a int
say_something("Hello"); // Uses a string
say_something(90.5); // Uses a float/double
return 0;
}