my own struct on vector

[remlostime]

6 int main()
7 {
8 struct nodeType
9 {
10 int a, b;
11 };
12 list<nodeType> x;
13 return 0;
14 }
(2 / 5): error: `main()::nodeType' uses local type `main()::nodeType'

what's wrong with my code? how should I modify?

 

[Jim Langston]

6 int main()
7 {
8 struct nodeType
9 {
10 int a, b;
11 };
12 list<nodeType> x;
13 return 0;
14 }
(2 / 5): error: `main()::nodeType' uses local type `main()::nodeType'

what's wrong with my code? how should I modify?

But me once too. You have to declare the structure outside of any function
including main. structures and classes used in templates can't be local to
a function.

struct nodeType
{
int a, b;
};

int main()
{
list<nodeType> x;
return 0;
}

should work.

 

[remlostime]

remlostimewrote:


But me once too. You have to declare the structure outside of any function
including main. structures and classes used in templates can't be local to
a function.

struct nodeType
{
int a, b;

};

int main()
{
list<nodeType> x;
return 0;

}

should work.

another question is how to add items to this list?
if I want to add a=1 b = 2 into it, how to do?

 

[Erik Wikström]

Please do not quote signatures.

another question is how to add items to this list?
if I want to add a=1 b = 2 into it, how to do?- Dölj citerad text -

nodeType n;
n.a = 1;
n.b = 2;
x.push_back(n);

Or you can add a constructor to your node:

struct nodeType {
int a, b;
nodeType(int a, b) : a(a), b(b) {}
};

Then you can use it like so:

x.push_back(nodeType(1,2));

 

[remlostime]

---------- Forwarded message ----------
From: remlostime <[email protected]>
Date: Feb 6, 6:58 pm
Subject: my own struct on vector
To: comp.lang.c++


6 int main()
7 {
8 struct nodeType
9 {
10 int a, b;
11 };
12 list<nodeType> x;
13 return 0;
14 }
(2 / 5): error: `main()::nodeType' uses local type `main()::nodeType'

what's wrong with my code? how should I modify?

The third question is how to print x.a

 

[Erik Wikström]

---------- Forwarded message ----------
From: remlostime <[email protected]>
Date: Feb 6, 6:58 pm
Subject: my own struct on vector
To: comp.lang.c++

  6 int main()
  7 {
  8   struct nodeType
  9   {
 10     int a, b;
 11   };
 12   list<nodeType> x;
 13   return 0;
 14 }
(2 / 5): error: `main()::nodeType' uses local type `main()::nodeType'

what's wrong with my code? how should I modify?

The third question is how to print x.a

You have to loop through all the elements in x and print them, like
this:

std::list<nodeType>::iterator it;
for (it = x.begin(); it != x.end(); ++it)
{
std::cout << it->a << "\n"
}

 

[tragomaskhalos]

The third question is how to print x.a

Can I preempt the fourth, fifth etc questions by
pointing you at the following STL resources:

http://www.sgi.com/tech/stl/
http://www.cppreference.com/index.html
http://www.dinkumware.com/manuals/default.aspx

HTH