View Compilation Error

0_0_14211291_32375.c: In function 'add':
0_0_14211291_32375.c:16:12: error: 'ik' undeclared (first use in this function)
    for(i=k;ik>=0;k--)
            ^
0_0_14211291_32375.c:16:12: note: each undeclared identifier is reported only once for each function it appears in