View Compilation Error

0_0_18410009_28745.cpp: In function 'bool check1()':
0_0_18410009_28745.cpp:23:13: error: invalid operands of types 'double' and 'int' to binary 'operator%'
   if (v[i] %3
             ^
0_0_18410009_28745.cpp:23:13: error: expected ')' at end of input
0_0_18410009_28745.cpp:23:13: error: expected statement at end of input
0_0_18410009_28745.cpp:23:13: error: expected '}' at end of input
0_0_18410009_28745.cpp:23:13: error: expected '}' at end of input