View Compilation Error

0_0_29816517_11.cpp: In function 'int main()':
0_0_29816517_11.cpp:37:22: error: 'i' does not name a type
         for(register i=1;i<1e7;i++)
                      ^
0_0_29816517_11.cpp:37:26: error: expected ';' before 'i'
         for(register i=1;i<1e7;i++)
                          ^