View Compilation Error

0_0_28199345_14650.c: In function 'main':
0_0_28199345_14650.c:28:9: error: 'j' undeclared (first use in this function)
         j = 0;
         ^
0_0_28199345_14650.c:28:9: note: each undeclared identifier is reported only once for each function it appears in