View Compilation Error

0_0_27085324_23280.cpp:7:7: error: expected constructor, destructor, or type conversion before '(' token
 printf("%d",sum);
       ^
0_0_27085324_23280.cpp:8:1: error: expected unqualified-id before 'return'
 return 0;
 ^
0_0_27085324_23280.cpp:9:1: error: expected declaration before '}' token
 }
 ^