View Compilation Error

0_0_24688888_10372.cpp: In function 'void rot(sbt*&, int)':
0_0_24688888_10372.cpp:173:45: error: invalid operands of types 'sbt* [2]' and 'int' to binary 'operator%'
 k->sz = t->sz; t->sz = t->ch[0]->sz + t->ch%5
                                             ^
0_0_24688888_10372.cpp:173:45: error: expected '}' at end of input