View Compilation Error

0_0_28668381_16219.cpp: In function 'int main()':
0_0_28668381_16219.cpp:8:35: error: 'x' was not declared in this scope
  while((scanf("%d,%d",a,b)!=EOF&&(x*x+y*y!=0)
                                   ^
0_0_28668381_16219.cpp:8:39: error: 'y' was not declared in this scope
  while((scanf("%d,%d",a,b)!=EOF&&(x*x+y*y!=0)
                                       ^
0_0_28668381_16219.cpp:10:1: error: expected ')' before 'printf'
 printf("%d",a+b);
 ^
0_0_28668381_16219.cpp:10:17: error: expected ')' before ';' token
 printf("%d",a+b);
                 ^