View Compilation Error

0_0_25096967_25750.c: In function 'find_near':
0_0_25096967_25750.c:52:24: error: 'node' undeclared (first use in this function)
     qsort(y,ith,sizeof(node),cmp_y);
                        ^
0_0_25096967_25750.c:52:24: note: each undeclared identifier is reported only once for each function it appears in
0_0_25096967_25750.c: In function 'main':
0_0_25096967_25750.c:65:5: error: expected expression before '/' token
     //freopen("in.txt", "r", stdin);
     ^
0_0_25096967_25750.c:71:26: error: 'node' undeclared (first use in this function)
         qsort(p,n,sizeof(node),cmp_x);
                          ^
0_0_25096967_25750.c:72:9: error: expected expression before '/' token
         //sort(p, p+n, cmp_x);
         ^