/in/foo.c: In function 'main':
/in/foo.c:11:37: warning: 'b' is used uninitialized [-Wuninitialized]
   11 |                         a[i][j]=b[j][i];
      |                                 ~~~~^~~
/in/foo.c:4:13: note: 'b' declared here
    4 |         int b[3][2];
      |             ^