array side-effect

[PRD3 at psuvm.psu.edu]

I have found a real stumper.
Partial listing follows:
...
int CODE_MATRIX[26][25];         //global
char INMOD1[50][3];              //global
...
int mod_loop=0;                  //local
...
mod_loop++;
INMOD1[mod_loop][0]="9";        //mod_loop is 1


This last statement changes the value of CODE_MATRIX[26][1]
from -9 to some large random number. Rows 1-25 are unchanged.
CODE_MATRIX[26][0] and CODE_MATRIX[26][2] may also be affected
but I forgot to check.  I have tried '9' instead of "9"
and I have used strcpy to replace the whole line.  The problem persists.

I am using Borland Turbo C++ on a 386Clone running DOS.