View Compilation Error

0_0_16618264_24317.cpp: In function 'int main()':
0_0_16618264_24317.cpp:5:9: error: expected initializer before '.' token
  int x,y.n,c;
         ^
0_0_16618264_24317.cpp:8:26: error: 'y' was not declared in this scope
  while((scanf("%d%d",&x,&y)!=EOF)&&(x!=0||y!=0))
                          ^
0_0_16618264_24317.cpp:12:5: error: 'a' was not declared in this scope
     a=n*n+n+41;
     ^
0_0_16618264_24317.cpp:13:26: error: 'sqrt' was not declared in this scope
     for(int i=2;i<=sqrt(a);++i)
                          ^