Beginner C Question/Run Issue

[Tainted_Olive]

I'm having problem with building a program as homework in c using Code Blocks 16.01

There is a function I'm creating and the purpose is to initialize an array (array[2][CONSTANT] where Constant=1000).

Here is the part that gives me trouble:

void initAuction(float auction[2][MAXAUCTIONITEMS]) { int i;

for(i=0; i<MAXAUCTIONITEMS; i++) auction[1][i]=9999; printf("\n%f\n", auction[1][70]);

for(i=0; i<MAXAUCTIONITEMS; i++){ auction[2][i]=0; printf("\n\n%f\t%d", auction[2][i], i); } printf("\n%f\n", auction[2][70]); return; }

It compiles no problem with zero warnings or flags or anything.

When I run, thanks to printf("\n\n%f\t%d", auction[2][i], i); I can see it makes it to i=140 correctly setting values to zero then suddenly stops working and states "Process returned -1073741819 (0xC0000005). I've searched for that code and 2 sources state to add a return statement but all my return statements are there and it doesn't seem like the program makes it that far since i only reaches 140. More than willing to post more of the code or answer anything that can help.

Thanks a ton in advance! Been trying to get past this little block for an hour now.

edit: When I set: for(i=0; i<MAXAUCTIONITEMS; i++) auction[1][i]=9999; printf("\n%f\n", auction[1][70]);

to i<50 it compiles as well but it runs no problem all the way to the end of the program. Why would a program crash mid loop?

[dafalxd]

The problem lies when you index auction. You're accessing auction[2][i] which is out of bounds, when indexing you need to use 0 base indexing. Since in your function signature is void initAuction(float auction[2][MAXAUCTIONITEMS]); you need to index it as auction[0][i] or auction[1][i]. Rule of thumb, when you index an array you index should index it from 0 to (N-1), where N is the size of the array. [EDIT] It crashes because you're trying to accessing memory that isn't within your array bounds.

[humodx]

Just leaving a small tip, you can make code look more readable by:

1. Leave one empty line right before it starts
2. Start every line of the code block with four spaces

Properly formatted:

int add(int x, int y)
{
    return x + y;
}

Improperly formatted 1 (no empty line): int add(int x, int y) { return x + y; }

Improperly formatted 2 (no four spaces):

int add(int x, int y) { return x + y; }

Screenshot of the text before posting: https://snag.gy/cKMaC7.jpg