/in/foo.c: In function 'main':
/in/foo.c:5:16: error: expected ']' before ',' token
  int a,b[-10^10,10^10];
                ^
/in/foo.c:7:22: error: 'b' undeclared (first use in this function)
  scanf("%d，%d",&a,&b);
                      ^
/in/foo.c:7:22: note: each undeclared identifier is reported only once for each function it appears in