c++用类模版实现push与 pop

#include<iostream>
using namespace std;
template <class T>
class templa{
public:
//初始化
templa(int n){
m=n;
mystr=(T*)malloc(sizeof(T)*n+sizeof(T));
for (int i =0; i<n; i++) {
cout<<"请输入第"<<i<<"位要插入的元素:"<<endl;
cin>>mystr[i];
}
cout<<"-----------allen---初始化完成---请指示-----------"<<endl;
}
//打印
void dayin(){
for (int i = 0; i<m; i++) {
cout<<mystr[i]<<endl;
}
cout<<"-----------allen---dayin完成---请指示-----------"<<endl;
}
//增加
bool add(T t,int n){
T * temp=(T *)malloc(sizeof(T)*m+sizeof(T)+sizeof(T));
for (int i =0; i<n; i++) {
temp[i]=mystr[i];
}
temp
=t;
for (int i =n; i<m+1; i++) {
temp[i+1]=mystr[i];
}
delete[] mystr;
mystr=temp;
m++;
cout<<"------------allen----add完成----请指示-----------"<<endl;
return true;
}
//删除
bool  move(int n){
T * temp=(T *)malloc(sizeof(T)*m);
for (int i =0; i<n; i++) {
temp[i]=mystr[i];
}
for (int i =n; i<m+1; i++) {
temp[i-1]=mystr[i];
}
delete[] mystr;
mystr=temp;
m--;
cout<<"------------allen----move完成----请指示-----------"<<endl;
return true;
}
//改
bool change(T t,int n){
mystr
=t;
//        cout<<mystr
<<endl;
cout<<"-----------allen---move完成---请指示-------------"<<endl;
return true;
}
//查
T cha(int n){
cout<<mystr
<<endl;
return mystr
;
cout<<"-----------allen---cha完成----请指示--------------"<<endl;
}
~templa(){
if (mystr!=NULL) {
delete [] mystr;
}
cout<<"-----------allen---~templa完成---请指示-----------"<<endl;
}
//push
bool push(T a){
T * temp=(T *)malloc(sizeof(T)*m+sizeof(T)+sizeof(T));
for (int i =0; i<m; i++) {
temp[i]=mystr[i];
}
temp[m]=a;
delete[] mystr;
mystr=temp;
m++;
cout<<"------------allen----push完成----请指示-----------"<<endl;
return true;
}
//pop
bool  pop(){
int n=m;
T * temp=(T *)malloc(sizeof(T)*(n-1));
for (int i =0; i<n-1; i++) {
temp[i]=mystr[i];
}
delete[] mystr;
mystr=temp;
m--;
cout<<"------------allen----pop完成----请指示-----------"<<endl;
return true;
}
private:
//个数
int m;
T* mystr;
};

int main()
{
int a;
cout<<"请输入要存的个数："<<endl;
cin>>a;
templa<int> allen(a);
allen.dayin();
allen.move(2);
allen.dayin();
allen.cha(2);
allen.add(1, 2);
allen.dayin();
allen.change(1, 1);
allen.push(22);
allen.dayin();
int b;
cout<<"请输入要存的个数："<<endl;
cin>>b;
templa<double> allen2(b);
allen2.dayin();
allen2.move(2);
allen2.dayin();
allen2.cha(2);
allen2.add(3, 2);
allen2.dayin();
allen2.change(3, 1);
allen2.pop();
allen2.dayin();
return 0;
}