Single-link list

[NerouN29]

help.I need to create a list of paired positive elements of two input lists
where is the mistake?
#include <iostream>
#include <Windows.h>
using namespace std;
struct a
{
int e;
a* next;
};
void print(a* list)
{
while (list)
{
cout << list->e << " ";
list = list->next;
}
}
//a* insert_after(a* pos, int val)
//{
//
//}
int main()
{
system("cls");
SetConsoleCP(1251);
SetConsoleOutputCP(1251);
int n,m,j;
a* begin = NULL;
a* last = NULL;
a* list = NULL;
a* begin1 = NULL;
a* last1 = NULL;
a* list1 = NULL;
a* list2 = NULL;
a* last2 = NULL;
a* begin2 = NULL;
cout << "n = ";
cin >> n;
cout << "m = ";
cin >> m;
while (n > 0)
{
last = new a;
last->e = rand() % 100 - 50;
if (begin == NULL)
{
last->next = NULL;
begin = last;
}
else
{
last->next = NULL;
list->next = last;
}
list = last;
n--;
}
while (m > 0)
{
last1 = new a;
last1->e = rand() % 100 - 50;
if (begin1 == NULL)
{
last1->next = NULL;
begin1 = last1;
}
else
{
last1->next = NULL;
list1->next = last1;
}
list1 = last1;
m--;
}
cout << "\nlist 1 = \n";
print(begin);
cout << "\nlist 2 = \n";
print(begin1);
j = -1;
/*while (list)
{
if (list->e > 0 and list->e % 2 == 0)
{
list->e = list2->e;
j++;
}
list = list->next;
}
while (list1)
{
if (list1->e > 0 and list1->e % 2 == 0)
{
list1->e = list2->e;
j++;
}
list1 = list1->next;
}*/
while (list)
{
if (list->e > 0 and list->e % 2 == 0)
{
list->e=list2->e;
list2 = list2->next;
}
list = list->next;
}
while (list1)
{
if (list1->e > 0 and list1->e % 2 == 0)
{
list1->e = list2->e;
list2 = list2->next;
}
list1 = list1->next;
}
cout << "\n list 3 = \n";
print(begin2);
while (begin)
{
list = begin;
begin = list->next;
delete list;
}
delete begin;
while (begin1)
{
list = begin1;
begin1 = list1->next;
delete list1;
}
delete begin1;
system("pause");
return 0;
}

[markyrocks]

use code tags ain't noone reading that the way it is.

[NerouN29]

what do you mean "tags"?

[deleted account xyzzy]

PLEASE learn to use code tags, they make reading and commenting on source code MUCH easier.

http://www.cplusplus.com/articles/jEywvCM9/
http://www.cplusplus.com/articles/z13hAqkS/

HINT: you can edit your post and add code tags.

[ne555]

> where is the mistake?
¿what are the symptoms? ¿compile error? ¿crash? ¿freeze? ¿bad output? ¿fever? ¿diarrhea?


> create a list of paired positive elements
don't know what you mean, provide an example