/in/foo.c: In function 'main':
/in/foo.c:20:26: warning: unknown escape sequence: '\040'
    if(a[k][i]<10) printf("\   %d",a[k][l]);
                          ^~~~~~~~
/in/foo.c:21:16: warning: unknown escape sequence: '\040'
    else printf("\  %d",a[k][l]);
                ^~~~~~~