View Compilation Error

0_0_17155745_12258.c: In function 'main':
0_0_17155745_12258.c:27:10: error: 't' undeclared (first use in this function)
   if (i!=t) printf("\n");
          ^
0_0_17155745_12258.c:27:10: note: each undeclared identifier is reported only once for each function it appears in