View Compilation Error

0_0_27728868_20192.cpp:5:1: error: missing terminating " character
 while(scanf("%d %d",&a,&b)!=EOF) printf("%d\na+b);
 ^
0_0_27728868_20192.cpp:1:1: error: 'Code' does not name a type
 Code Render Status : Rendered By HDOJ G++ Code Render Version 0.01 Beta
 ^
0_0_27728868_20192.cpp: In function 'int main()':
0_0_27728868_20192.cpp:6:1: error: expected primary-expression before 'return'
 return 0;
 ^