比较向量< int>的元素并列出< int> [英] comparing elements of vector<int> and list<int>
问题描述
这是一个非常丑陋的黑客，但现在我能够想出来了
:(并且它确实需要工作。我想改进程序，我是/>
知道你有更好的想法;-)
/ * C ++ Primer - 4 / e
*
*练习9.20
*声明：
*编写一个程序来比较一个向量< int包含
*相同的元素作为列表< int> ;。
*
* /
#include< iostream>
#include< vector>
#include< list>
#include< algorithm>
#include< iterator>
int main（）
{
std :: cout<< 为VECTOR输入一些整数：;
std :: vector< intivec;
std :: copy（std :: istream_iterator< int>（std ::） cin），
std :: istream_iterator< int>（），
std :: back_inserter（ivec））;
std :: cin.clear（）;
std :: cout<< 为LIST输入一些整数：;
std :: list< intilist;
std :: copy（std :: istream_iterator< int>（std ::） cin），
std :: istream_iterator< int>（），
std :: back_inserter（ilist））;
std :: cout<< \ n现在我们将比较VECTOR& LIST for equality ::" ;;
bool comp_result = true;
std :: vector< int> :: const_iterator viter = ivec.begin（） ;
std :: list< int> :: const_iterator liter = ilist.begin（）;
/ *如果尺寸不相等，那么它们不能相等： - ）* /
if（ivec.size（）！= ilist.size（））
{
comp_result = false;
}
其他
{
for（;（viter！= ivec.end（））||（升！ = ilist.end（））;
++ viter，++升）
{
if（* viter！= *升）
{
comp_result = false;
}
}
}
if（comp_result）
{
std :: cout<< VECTOR& LIST是EQUAL << std :: endl;
}
else
{
std :: cout<< VECTOR&列表不相等 << std :: endl;
}
返回0;
}
==== =====几次运行=================
~ / programming / c ++ $ g ++ -ansi -pedantic -Wall -Wextra ex_09- 20.cpp
~ / programming / c ++ $ ./a.out
为VECTOR输入一些整数：1 2 3
输入一些整数列表：1 2 1
现在我们将比较VECTOR&平等列表:: VECTOR&列表不相等
~ / programming / c ++ $ ./a.out
为VECTOR输入一些整数：1
输入一些整数列表：1 2 3 4 5 6 7 8 9 0 9 9 8 8 8 8 8 8 8 8 8 8
8 8 8 88 88 88 8 8 8 88 8 8 88 8 8 8 8 8 8 8 8
现在我们将比较VECTOR&平等列表:: VECTOR&列表不相等
~ / programming / c ++ $ ./a.out
为VECTOR输入一些整数：1 2 3
输入一些LIST的整数：1 2 3
现在我们将比较VECTOR&平等列表:: VECTOR& LIST是EQUAL
~ / programming / c ++ $ ./a.out
为VECTOR输入一些整数：1 2 3
输入一些整数列表：1 2
现在我们将比较VECTOR&平等列表:: VECTOR&列表不等于
等于
- arnuld
http://lispmachine.wordpress.com
It is quite an ugly hack but it is all I am able to come up with for
now :-( and it does the requires work. I want to improve the program, I
know you people have much better ideas ;-)
/* C++ Primer - 4/e
*
* exercise 9.20
* STATEMENT:
* Write a program to to compare whether a vector<intcontains the
* same elements as a list<int>.
*
*/
#include <iostream>
#include <vector>
#include <list>
#include <algorithm>
#include <iterator>
int main()
{
std::cout << "Enter some integers for VECTOR: ";
std::vector<intivec;
std::copy( std::istream_iterator<int>( std::cin ),
std::istream_iterator<int>(),
std::back_inserter( ivec ) );
std::cin.clear();
std::cout << "Enter some integers for LIST: ";
std::list<intilist;
std::copy( std::istream_iterator<int>( std::cin ),
std::istream_iterator<int>(),
std::back_inserter( ilist ) );
std::cout << "\nNow we will compare VECTOR & LIST for equality :: ";
bool comp_result = true;
std::vector<int>::const_iterator viter = ivec.begin();
std::list<int>::const_iterator liter = ilist.begin();
/* If sizes are unequal, then they can not be equal :-) */
if( ivec.size() != ilist.size() )
{
comp_result = false;
}
else
{
for( ; ( viter != ivec.end() ) || ( liter != ilist.end() );
++viter, ++liter )
{
if( *viter != *liter )
{
comp_result = false;
}
}
}
if( comp_result )
{
std::cout << "VECTOR & LIST are EQUAL" << std::endl;
}
else
{
std::cout << "VECTOR & LIST are NOT equal" << std::endl;
}
return 0;
}
========= A FEW RUNS =================
~/programming/c++ $ g++ -ansi -pedantic -Wall -Wextra ex_09-20.cpp
~/programming/c++ $ ./a.out
Enter some integers for VECTOR: 1 2 3
Enter some integers for LIST: 1 2 1
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are NOT equal
~/programming/c++ $ ./a.out
Enter some integers for VECTOR: 1
Enter some integers for LIST: 1 2 3 4 5 6 7 8 9 0 9 9 8 8 8 8 8 8 8 8 8 8
8 8 8 88 88 88 8 8 8 88 8 8 88 8 8 8 8 8 8 8 8
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are NOT equal
~/programming/c++ $ ./a.out
Enter some integers for VECTOR: 1 2 3
Enter some integers for LIST: 1 2 3
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are EQUAL
~/programming/c++ $ ./a.out
Enter some integers for VECTOR: 1 2 3
Enter some integers for LIST: 1 2
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are NOT
equal
-- arnuld
http://lispmachine.wordpress.com
推荐答案
g ++ -ansi -pedantic -Wall -Wextra ex_09-20.cpp
~ / programming / c ++
g++ -ansi -pedantic -Wall -Wextra ex_09-20.cpp
~/programming/c++
./ a.out
输入一些整数矢量：1 2 3
为LIST输入一些整数：1 2 1
现在我们将比较VECTOR&平等列表:: VECTOR&列表不相等
~ / programming / c ++
./a.out
Enter some integers for VECTOR: 1 2 3
Enter some integers for LIST: 1 2 1
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are NOT equal
~/programming/c++
./ a.out
为VECTOR输入一些整数：1
为LIST输入一些整数：1 2 3 4 5 6 7 8 9 0 9 9 8 8 8 8 8 8 8 8 8
8 8 8 88 88 88 8 8 8 88 8 8 88 8 8 8 8 8 8 8 8
现在我们将比较VECTOR&平等列表:: VECTOR&列表不相等
~ / programming / c ++
./a.out
Enter some integers for VECTOR: 1
Enter some integers for LIST: 1 2 3 4 5 6 7 8 9 0 9 9 8 8 8 8 8 8 8 8 8 8
8 8 8 88 88 88 8 8 8 88 8 8 88 8 8 8 8 8 8 8 8
Now we will compare VECTOR & LIST for equality :: VECTOR & LIST are NOT equal
~/programming/c++
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