#include<iostream>
using namespace std;
template<typename T>
class sqlist
{
    private:
        int mm,length;
        T *v;
    public:
        sqlist(){mm=0;length=0;return;}
        sqlist(int);
        void printsqlist();
        //int flagsqlist();//
        void insqlist(int ,T);
        void deisqlist(int);
        //void sortsqlist();//
};
template<class T>
void sqlist<T>::printsqlist()
{
    int i;
    cout<<"length="<<length<<endl;
    for(i=0;i<length;i++)cout<<v[i]<<"  ";
    cout<<endl;
}
template<class T>
int sqlist<T>::insqlist(int i,T a)
{
    int k;
    if(mm==length){cout<<"溢出"<<endl;return;}
    if(i>n)i=n+1;
    if(i<1)i=1;
    for(k=length;k>i;k--)
        v[k]=v[k-1];
    v[i-1]=a;
    length++;
    return;
}
template<class T>
void sqlist<T>::deisqlist(int i)
{
    int k;
    if(length==0)
    {cout<<"非法,表空"<<endl;return;}
    if(i<1||i>length)
    {cout<<"位置错误"<<endl;return;}
    for(k=i;k<length;k++)
        v[k-1]=v[k];
    length--;
    return;
}
//template<class T>
//void sqlist::sortsqlist()
//{
    

//}//
void main()
{
    int k,a[10]={1,2,3,4,5,6,7,8,9,10};
    sqlist<int> s(20);
    for(k=1;k<=10;k++)
        s.insqlist(k,a[k-1]);
    s.printsqlist();

}
调试错误:
:\program files\microsoft visual studio\myprojects\1\1.cpp(38) : error C2244: 'sqlist<T>::insqlist' : unable to resolve function overload
c:\program files\microsoft visual studio\myprojects\1\1.cpp(39) : error C2954: template definitions cannot nest
Error executing cl.exe.

int sqlist<T>::insqlist(int i,T a)
看这句代码，返回类型是int类型的，但是在你类的声明里，返回类型是void。改成一致就可以了，