weird compile errors - vector & templates [closed]
I'm writing a "PersonalVec" template class - a vector with other qualities. As a template class, i've implemented everything in the .hpp, as follows:
#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_ */
I don't understand what's so wrong with my code that the compiler keeps shouting errors like:
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: err开发者_开发问答or: ‘_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
I'd really appriciate your help, since i'm really going nuts here.
Typo here:
std::vecotr<T> _myVec;
^^^^^^
It should be vector.
I put your code through Clang and got
main1.cpp:18:7: error: no template named 'vecotr' in namespace 'std'; did you mean 'vector'?
std::vecotr<T> _myVec;
~~~~~^~~~~~
vector
In file included from main1.cpp:4:
In file included from /usr/include/c++/4.5.1/vector:64:
/usr/include/c++/4.5.1/bits/stl_vector.h:170:11: note: 'vector' declared here
class vector : protected _Vector_base<_Tp, _Alloc>
^
main1.cpp:43:13: error: functions that differ only in their return type cannot be overloaded
const int& operator[](size_type index){
^
main1.cpp:38:7: note: previous declaration is here
int& operator[](size_type index){
^
main1.cpp:32:19: error: called object type 'int' is not a function or function pointer
int rand = rand()%_myVec.size();
~~~~^
3 errors generated.
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