View Compilation Error

0_0_19492127_1632.cpp:5:2: error: stray '\241' in program
  while (～scanf("%d%d",&m,&n)&&(m||n))
  ^
0_0_19492127_1632.cpp:5:2: error: stray '\253' in program
0_0_19492127_1632.cpp: In function 'int main()':
0_0_19492127_1632.cpp:7:5: error: 'a' was not declared in this scope
   x=a;
     ^