View Compilation Error

0_0_18583579_891.cpp:5:2: error: stray '\243' in program
  while(scanf("%d%d",&a，&b)!=EOF
  ^
0_0_18583579_891.cpp:5:2: error: stray '\254' in program
0_0_18583579_891.cpp: In function 'int main()':
0_0_18583579_891.cpp:5:26: error: invalid operands of types 'int*' and 'int' to binary 'operator&'
  while(scanf("%d%d",&a，&b)!=EOF
                          ^
0_0_18583579_891.cpp:6:2: error: expected ')' before '{' token
  {
  ^
0_0_18583579_891.cpp:9:9: error: 'o' was not declared in this scope
  return o;
         ^