哭～！！！！大哥们帮忙！！！！函数模板！！！！

[zhongwei5695]

#include <iostream>
#include <cstdlib>
using namespace std;

template<typename Any>
void swap(Any &a,Any &b);

int main()
{
int i=10;
int j=20;
cout<<"i , j = "<<i<<" , "<<j<<endl;
swap(i,j);
cout<<"Now i , j = "<<i<<" , "<<j<<endl;
double x=24.5;
double y=552.32;
cout<<"x , y = "<<x<<" , "<<y<<endl;
swap(x,y);
cout<<"Now x , y = "<<x<<" , "<<y<<endl;

system("pause");
return 0;
}

template<typename Any>
void swap(Any & a ,Any & b)
{
Any temp;
temp = a;
a = b;
b = temp;
}
错误信息：
D:\C++\primer8_06.cpp In function `int main()':
13 D:\C++\primer8_06.cpp call of overloaded `swap(int&, int&)' is ambiguous
error D:\C++\primer8_06.cpp:6 candidates are: void swap(Any&, Any&) [with Any = int]
121 C:\Dev-Cpp\include\c++\3.3.1\bits\stl_algobase.h void std::swap(_Tp&, _Tp&) [with _Tp = int]
18 D:\C++\primer8_06.cpp call of overloaded `swap(double&, double&)' is ambiguous
error D:\C++\primer8_06.cpp:6 candidates are: void swap(Any&, Any&) [with Any = double]
121 C:\Dev-Cpp\include\c++\3.3.1\bits\stl_algobase.h void std::swap(_Tp&, _Tp&) [with _Tp = double]
例子出自C++ primer plus p225 程序清单8.9

是例子错了？ 还是小弟粗心检查不出，大哥们帮我看看 到底错误在那里？？
应该如何改正！？

[zhangfjj]

好象在系统库函数里面提供有swap的函数模板，你再定义swap与系统的发生了冲突，你只要把swap改个名就可以了，比如swap1

[zhangfjj]

#include <iostream>
#include <cstdlib>
using namespace std;

template<typename Any>
void swap1(Any &a,Any &b);

int main()
{
int i=10;
int j=20;
cout<<"i , j = "<<i<<" , "<<j<<endl;
swap1(i,j);
cout<<"Now i , j = "<<i<<" , "<<j<<endl;
double x=24.5;
double y=552.32;
cout<<"x , y = "<<x<<" , "<<y<<endl;
swap1(x,y);
cout<<"Now x , y = "<<x<<" , "<<y<<endl;

system("pause");
return 0;
}

template<typename Any>
void swap1(Any & a ,Any & b)
{
Any temp;
temp = a;
a = b;
b = temp;
}

[zhangfjj]

13 D:\C++\primer8_06.cpp call of overloaded `swap(int&, int&)' is ambiguous
error D:\C++\primer8_06.cpp:6 candidates are: void swap(Any&, Any&) [with Any = int]
其实从此句就可以看出来

[zhongwei5695]

谢谢 大哥们 知道了