GCC4.0是不是不支持模板?

by325

想问一下,GCC4.0是不是不支持模板?代码和错误提示如下:
//funtemp.cpp --using a function template
#include<iostream>

template <class T>
void swap(T &a,T &b);

int main()
{
  using namespace std;
  int i=10,j=20;
  cout<<"i,j="<<i<<","<<j<<".\n";
  cout<<"Using compiler-generated int swapper: \n";
  swap(i,j);
  cout<<"Now i,j="<<i<<","<<j<<".\n";

  double x=24.5,y=81.7;
  cout<<"x,y="<<x<<","<<y<<".\n";
  cout<<"Using comiler-generated double swapper: \n";
  swap(x,y);
  cout<<"Now x,y="<<x<<","<<y<<".\n";

  cin.get();
  return 0;
}

template <class T>
void swap(T &a,T &b)
{
  T temp;
  temp=a;
  a=b;
  b=temp;
}
funtemp.cpp: In function ‘int main()’:
funtemp.cpp:13: 错误：调用重载的 ‘swap(int&, int&)’ 有歧义
funtemp.cpp:5: 附注：备选为： void swap(T&, T&) [with T = int]
/usr/lib/gcc/i386-redhat-linux/4.1.0/../../../../include/c++/4.1.0/bits/stl_algobase.h:92:
附注：         void std::swap(_Tp&, _Tp&) [with _Tp = int]
funtemp.cpp:19: 错误：调用重载的 ‘swap(double&, double&)’ 有歧义
funtemp.cpp:5: 附注：备选为： void swap(T&, T&) [with T = double]
/usr/lib/gcc/i386-redhat-linux/4.1.0/../../../../include/c++/4.1.0/bits/stl_algobase.h:92:
附注：         void std::swap(_Tp&, _Tp&) [with _Tp = double]

x11

你觉得可能么

by325

我也觉得不太可能,但总提示:定义的函数歧义,

zlbruce

贴下代码吧.

by325

//funtemp.cpp --using a function template
#include<iostream>

template <class T>
void swap(T &a,T &b);

int main()
{
  using namespace std;
  int i=10,j=20;
  cout<<"i,j="<<i<<","<<j<<".\n";
  cout<<"Using compiler-generated int swapper: \n";
  swap(i,j);
  cout<<"Now i,j="<<i<<","<<j<<".\n";

  double x=24.5,y=81.7;
  cout<<"x,y="<<x<<","<<y<<".\n";
  cout<<"Using comiler-generated double swapper: \n";
  swap(x,y);
  cout<<"Now x,y="<<x<<","<<y<<".\n";

  cin.get();
  return 0;
}

template <class T>
void swap(T &a,T &b)
{
  T temp;
  temp=a;
  a=b;
  b=temp;
}
funtemp.cpp: In function ‘int main()’:
funtemp.cpp:13: 错误：调用重载的 ‘swap(int&, int&)’ 有歧义
funtemp.cpp:5: 附注：备选为： void swap(T&, T&) [with T = int]
/usr/lib/gcc/i386-redhat-linux/4.1.0/../../../../include/c++/4.1.0/bits/stl_algobase.h:92:
附注：         void std::swap(_Tp&, _Tp&) [with _Tp = int]
funtemp.cpp:19: 错误：调用重载的 ‘swap(double&, double&)’ 有歧义
funtemp.cpp:5: 附注：备选为： void swap(T&, T&) [with T = double]
/usr/lib/gcc/i386-redhat-linux/4.1.0/../../../../include/c++/4.1.0/bits/stl_algobase.h:92:
附注：         void std::swap(_Tp&, _Tp&) [with _Tp = double]

x11

swap是stl已经定义了的

by325

问题已经解决了,谢谢楼上的!Thank you very much!

bug732

学习，学习！