xcode - bus error in simple Mac OSX C program -

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i writing simple c program create twelve tone matrix. code compiles, run time error 'bus error'. in debugger says exc_bad_access. 

int main () {     int j,k,l;     int twelve[13][13];     void mat(int twelve[13][13]);     printf("input original tone row \n");     for(j=0;j<=11;j++)     {         scanf("%2i",&twelve[j][0]);     }     mat(twelve);      for(k=0;k<=11;k++)     {         for(l=0;l<=11;l++)         {             printf("%i ",twelve[l][k]);         }         printf("\n");     }     return 0; }  void mat(twelve)     int twelve[13][13]; {     int j,k,l;     int temp;     /*inversion*/     for(j=1;j<=11;j++)     {         twelve[0][j] = 12 - twelve[j][0];     }     /*fill in columns*/     /*this sections seems what's crashing */     for(k=1;k<=11;k++)     {         for(l=1;1<=11;l++)         {             temp = twelve[0][k] + twelve[l][0];             if(temp >= 12)             {                 twelve[k][l] = temp - 12;             }             else              {                 twelve[k][l] = temp;             }         }     } }

there typo in inner loop condition of mat() subroutine.

this why don't 'l' (el) index.

for(l=1;1<=11;l++)

you meant "l < 11" (el) not "1 < 11" (one)

one less eleven, l (el) index increases without bound, leads illegal memory access when index gets large.


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