View Compilation Error

1_868_2663_7129.cpp: In function 'int main()':
1_868_2663_7129.cpp:16:13: error: expected primary-expression before 'long'
       if((x-long long(x))<0.5)
             ^
1_868_2663_7129.cpp:16:13: error: expected ')' before 'long'
1_868_2663_7129.cpp:20:4: error: expected ')' before 'else'
    else
    ^
1_868_2663_7129.cpp:24:3: error: expected primary-expression before '}' token
   }
   ^