202002XX-函数重载

1. #include "stdafx.h"

2. #include "iostream"

3. #include "cstring"

4. #include "string"

5. using namespace std;

6. struct job

7. {

8.   char name[40];

9.   double salary;

10.   int floor;

11. };

12. int jzj(int a,int b);

13. int jzj(int a,int b,int c);

14. int main()

15. {  

16. int a=1,b=1,d=2;

17. cout<<jzj(a,b)<<endl;

18. cout<<jzj(a,b,d)<<endl;

19. }

20. int jzj(int d,int b)

21. {

22.   return d+b;

23. }

24. int jzj(int a,int b,int c)

25. {

26.   return a+b+c;

27.  

28. }

运行结果：



代码2：

#include <iostream>

template <typename T>

void ShowArray(T arr[],int n);

template <typename T>

void ShowArray(T * arr[],int n);

struct debts{

char name[50];

double amount;

};

using namespace std;

int main(int argc, char** argv){

  int things[6]={13,31,103,301,310,130};

  struct debts mr_E[3]=

  {

   {"ima wolfe",2400.0},

   {"ura foxe",1300.0},

   {"iby stout",1800.0}  

  };

  double * pd[3];

  for (int i=0;i<=2;i++)

  

   pd[i]=&mr_E[i].amount;//set pointers to thd amount members of the structures in mr_E

   cout<<"Listing Mr.E's counts of things:\n";

   //things ins an array of int

   ShowArray(things,6);//used template A

   cout<<"Listing Mr.E's debts:\n";

    ShowArray(pd,3);

return 0;

}

template <typename T>

void ShowArray(T arr[],int n){

for(int i=0;i<n;i++)

  cout<<arr[i]<<' '<<endl;

}

template <typename T>

void ShowArray(T * arr[],int n){

for(int i=0;i<n;i++)

  cout<<*arr[i]<<' '<<endl;

}


代码3：

#include <iostream>

using namespace std;

template <class T>

T lesser(T a,T b)//1#

{

return a<b?a:b;

}

 

int lesser(int a,int b)//2#

{

a=a<0?-a:a;

b=b<0?-b:b;

return a<b?a:b;

}

int main()

{

 int m=20;

 int n=-30;

 double x=15.5;

 double y=25.9;

 cout<<lesser(m,n)<<endl;//use 2#,20

 cout<<lesser(x,y)<<endl;//use 1# 15.5

 cout<<lesser<>(m,n)<<endl; //use 1# -30

 cout<<lesser<int>(x,y)<<endl;//use 1# double-int