View Compilation Error

0_0_18057170_610.cpp: In function 'void read(__ll&)':
0_0_18057170_610.cpp:41:24: error: expected primary-expression before '%' token
     while(ch>='0'&&ch<=%2
                        ^
0_0_18057170_610.cpp:41:25: error: expected ')' at end of input
     while(ch>='0'&&ch<=%2
                         ^
0_0_18057170_610.cpp:41:25: error: expected statement at end of input
0_0_18057170_610.cpp:41:25: error: expected '}' at end of input