c++ 模板方面的问题

liq2004

大家看看我的函数哪有问题？
template <class Type, int size>
Type min(const Type (&r_array)[size])
{
        Type min_val = r_array[0];
        for( int i = 1; i < size; ++i)
                if (r_array < min_val)
                        min_val = r_array;
        return min_val;
}
In function 'Type min()':
error: 'r_array' was not declared in this scope

liuanggh

函数中的r_array数组没有定义
你应该在这个函数之前定义r_array

deadcode

template <class Type, int size>
Type min(const Type (&r_array)[size])
可以写成
template <class Type>
Type min(const Type* r_array,int size)

tuantuan

[code:1]
#include <iostream>

template <class Type, int size>
Type min(const Type (&r_array)[size])
{
    Type min_val = r_array[0];
    for( int i = 1; i < size; ++i)
        if (r_array[i] < min_val)
            min_val = r_array[i];
    return min_val;
}

int main()
{
    int array[5] = {5,4,3,2,1};
    std::cout << min<int, 5>(array) << std::endl;
}
[/code:1]
C:\WINDOWS\system32\cmd.exe /c g++ -v
Reading specs from D:/App/MinGW/bin/../lib/gcc-lib/mingw32/3.2.3/specs
Configured with: ../gcc/configure --with-gcc --with-gnu-ld --with-gnu-as --host=
mingw32 --target=mingw32 --prefix=/mingw --enable-threads --disable-nls --enable
-languages=c++,f77,objc --disable-win32-registry --disable-shared --enable-sjlj-
exceptions
Thread model: win32
gcc version 3.2.3 (mingw special 20030504-1)