C + + function template One (function template definition)

//function Template definition--data type do parameters#include <iostream>using namespacestd;/*function Template Declaration 1. A function template definition consists of a template description and a function definition, and a template description corresponds to a function definition 2. The generic parameter of the template description must appear at least once in the function definition of 3. A generic type parameter can be used in the function parameter table, You can also use generic type parameters*//*The template keyword tells the C + + compiler to do generic programming now TypeName or class tells the C + + compiler that T is a data type, do not check syntax TypeName and class can replace each other completely */Template<typename t>//can also be written template<class t>voidMyswap (t &a, T &b) {T C=A; A=b; b=c;};//void Print (T &a,t &b) {//cout << "a=" << a << "\nb=" << b << Endl;//}//Error: A template description can only correspond to a function definition, want to define a function again, you must write a template declarationTemplate<classT>voidPrint (t &a, T &b) {cout<<"a="<< a <<"\nb="<< b <<Endl;}//Multi-parameter function templatesTemplate<typename T1,typename t2>//This definition will be error mysort (a) when calling the function;//the generic parameter of the template description must appear at least once in the function definitionvoidMysort (T1 a) {cout<<"AAA"<<Endl;} Template<typename t>voidGetnum (T A,intb) {cout<<"a="<< a <<"; \nb="<<b <<Endl;}voidMain () {intA=1; intb =2; //How to use generic programming functions 1---automatic type deductionMyswap (A, b);    Print (A, b); //How to use generic programming functions 2---Explicit concrete type invocationmyswap<int>(A, b);    Print (A, b); //Mysort (a); Error: Error C2783: "Void Mysort (T1)": Failed to derive template parameters for "T2"cout <<"----------------"<<Endl; Getnum (A,4); System ("Pause");}

C + + function template One (function template definition)