<分区>
我正在编写一个“PersonalVec”模板类——一个具有其他特性的 vector 。 作为模板类，我已经在.hpp 中实现了所有内容，如下所示:
#ifndef PERSONALVEC_HPP_
#define PERSONALVEC_HPP_
#include <vector>
#include <iostream>
#include <string>
#include <algorithm>
#include <ctime>
#include <cstdlib>
#include <cassert>
using namespace std;
template <class T, class PrnT>
class PersonalVec{
std::vecotr<T> _myVec;
public:
typedef typename vector<T>::size_type size_type;
PersonalVec():_myVec(){
srand(time(NULL));
}
void push_back(T element){
_myVec.push_back(element);
if(_myVec.size()!= 0){//TODO: change to 1?!!?
//pick a random number between 0..n-1
int rand = rand()%_myVec.size();
//swap
std::swap(_myVec.at(rand), _myVec.at(_myVec.size()-1));
}
}
int& operator[](size_type index){
assert(index>=0 && index<_myVec.size());
return _myVec.at(index);
}
const int& operator[](size_type index){
assert(index>=0 && index<_myVec.size());
const T element= _myVec.at(index);
return element;
}
void erase(size_type index){
assert(index>=0 && index<_myVec.size());
if(index < _myVec.size()-1){
std::swap(_myVec.at(index) , _myVec.at(_myVec.size()-1));
}
_myVec.pop_back();
}
void print(){
for(size_type i=0; i<_myVec.size();++i){
cout << PrnT()(_myVec.at(i))<<" ";
}
cout << endl;
}
};
#endif /* PERSONALVEC_HPP_ */
我不明白我的代码有什么问题导致编译器不断报错，例如:
PersonalVec.hpp:18: error: ISO C++ forbids declaration of ‘vecotr’ with no type
PersonalVec.hpp:18: error: invalid use of ‘::’
PersonalVec.hpp:18: error: expected ‘;’ before ‘<’ token
PersonalVec.hpp:43: error: ‘const int& PersonalVec<T, PrnT>::operator[](typename std::vector<T, std::allocator<_Tp1> >::size_type)’ cannot be overloaded
PersonalVec.hpp:38: error: with ‘int& PersonalVec<T, PrnT>::operator[](typename std::vector<T, std::allocator<_Tp1> >::size_type)’
PersonalVec.hpp: In member function ‘void PersonalVec<T, PrnT>::push_back(T)’:
PersonalVec.hpp:29: error: ‘_myVec’ was not declared in this scope
PersonalVec.hpp:32: error: ‘rand’ cannot be used as a function
PersonalVec.hpp: In member function ‘int& PersonalVec<T, PrnT>::operator[](typename std::vector<T, std::allocator<_Tp1> >::size_type)’:
PersonalVec.hpp:39: error: ‘_myVec’ was not declared in this scope
PersonalVec.hpp: In member function ‘const int& PersonalVec<T, PrnT>::operator[](typename std::vector<T, std::allocator<_Tp1> >::size_type)’:
PersonalVec.hpp:44: error: ‘_myVec’ was not declared in this scope
PersonalVec.hpp: In member function ‘void PersonalVec<T, PrnT>::erase(typename std::vector<T, std::allocator<_Tp1> >::size_type)’:
PersonalVec.hpp:51: error: ‘_myVec’ was not declared in this scope
PersonalVec.hpp: In member function ‘void PersonalVec<T, PrnT>::print()’:
PersonalVec.hpp:59: error: ‘_myVec’ was not declared in this scope
我真的很感谢你的帮助，因为我真的要疯了。