Sum in a Visual Tool

I have a visual tool in my model that displays current content...is there a way to have the visual tool show a sum of the content of several objects? I would like it to show the sum of two queues and a conveyor.

Jill,

Use the center port connection to connect all of the objects to the visual tool. Replace (all) the code with the following code in the Text Display trigger:

treenodecurrent = ownerobject(c);
treenode textnode = parnode(1);/**Dislay the sum of the objects*/
int index;
int sum = 0;
for(index = 1; index <= nrcp(current); index++)
{
sum += content(centerobject(current, index));
}
setnodestr(textnode, concat("The sum of the objects is: ", numtostring(sum, 0, 0)));

This will sum up the content of all of the objects connected to the visual tool through the center port.

A few notes:
+= means that you want to add the value on the right to the variable on the left.
concat() is a function that will add string values together into one string.

Good Luck,
Brandon

I am getting the following error when I input the code:

line5: syntax error, unexpected assignment operator


What am I missing? Attached is a picture of the code window.

Thank you for all your help!

Should be

for(index = 1; index <= nrcp(current); index++)