View Compilation Error

0_0_29586647_30914.cpp:5:1: error: stray '\243' in program
 while（scanf("%d",&a)!=EOF）
 ^
0_0_29586647_30914.cpp:5:1: error: stray '\250' in program
0_0_29586647_30914.cpp:5:1: error: stray '\243' in program
0_0_29586647_30914.cpp:5:1: error: stray '\251' in program
0_0_29586647_30914.cpp: In function 'int main()':
0_0_29586647_30914.cpp:5:8: error: expected '(' before 'scanf'
 while（scanf("%d",&a)!=EOF）
        ^
0_0_29586647_30914.cpp:7:4: error: expected primary-expression before 'while'
    while(a--)
    ^
0_0_29586647_30914.cpp:19:2: error: expression cannot be used as a function
  )
  ^
0_0_29586647_30914.cpp:20:1: error: expected ')' before 'return'
 return 0;
 ^