View Compilation Error

0_0_24525158_2053.cpp: In function 'int main()':
0_0_24525158_2053.cpp:54:46: error: expected ')' before ';' token
           for (int k = 1; k < num[i]; k <<= 1;)
                                              ^
0_0_24525158_2053.cpp:54:47: error: expected primary-expression before ')' token
           for (int k = 1; k < num[i]; k <<= 1;)
                                               ^