View Compilation Error

0_0_14947684_4987.c: In function 'main':
0_0_14947684_4987.c:10:9: error: 'i' undeclared (first use in this function)
     for(i=t;t<=n;t++)
         ^
0_0_14947684_4987.c:10:9: note: each undeclared identifier is reported only once for each function it appears in