View Compilation Error

1_798_2519_2702.cpp: In function 'int main()':
1_798_2519_2702.cpp:29:18: error: 'struct node' has no member named 'ans'
             d[i].ans=(d[i].a+d[i].b)/(d[i].a+d[i].b+d[i].c);
                  ^