View Compilation Error

0_0_28575244_24526.cpp:17:3: error: stray '\243' in program
   mem(vis, 0，sizeof(vis));
   ^
0_0_28575244_24526.cpp:17:3: error: stray '\254' in program
0_0_28575244_24526.cpp: In function 'int main()':
0_0_28575244_24526.cpp:17:15: error: expected ')' before 'sizeof'
   mem(vis, 0，sizeof(vis));
               ^
0_0_28575244_24526.cpp:9:27: note: in definition of macro 'mem'
 #define mem(a,b) memset(a,b,sizeof(a))
                           ^