Weird error when using array

[axr0284]

Hi,
I have this piece of code:

#define NUMPACKETS 100
double arrivalTimeArray[NUMPACKETS];
for(int i=0; i<=NUMPACKETS; i++) {
			next = expDistArrival();
			arrivalTimeArray[i] = next + current;
			current = arrivalTimeArray[i];
	}
	double test =  arrivalTimeArray[100];

expDistArrival() just gets a random number. This works. I double checked.

When I try to run the last line, I get the following error:
Run-Time Check Failure #3 - The variable 'arrivalTimeArray' is being used without being defined.

I am using MSVC++ .NET 2003. Any help would be highly appreciated. Thanks
Amish

[JoshR]

well remember when you have an array of 100 items, the last item is in the 99th spot so on that subject:

#define NUMPACKETS 100
double arrivalTimeArray[NUMPACKETS];
for(int i=0; i<NUMPACKETS; i++) { // its not <= because it doesnt go up to 100
			next = expDistArrival();
			arrivalTimeArray[i] = next + current;
			current = arrivalTimeArray[i];
	}
	// double test =  arrivalTimeArray[100]; there is no 100th spot

[Enahs]

Arrays starts counting at zero, not one.

So index 1 is actually at index array[0], 2 is at array[1], ect.

You also have the problem in your for loop of it being less than or equal to 100. So it will try and write data into the 100 index of the array, which will not work.

If you make the for loop just less than array size, and call the last proper array index (99 in this case) it should probably might work. But I make no guarntees.

*edit*
Bah, as I was typing JoshR posted before me.

[axr0284]

Damn that was one stupid mistake. Thanks a lot for the answer,
Amish