View Compilation Error

0_0_31209840_5741.cpp:6:2: error: stray '\243' in program
  while (scanf("%d", &n)!=EOF） 
  ^
0_0_31209840_5741.cpp:6:2: error: stray '\251' in program
0_0_31209840_5741.cpp:14:22: error: stray '\243' in program
                      sum+=（m-x）*4;
                      ^
0_0_31209840_5741.cpp:14:22: error: stray '\250' in program
0_0_31209840_5741.cpp:14:22: error: stray '\243' in program
0_0_31209840_5741.cpp:14:22: error: stray '\251' in program
0_0_31209840_5741.cpp:16:22: error: stray '\243' in program
                      sum+=（x-m）*6;
                      ^
0_0_31209840_5741.cpp:16:22: error: stray '\250' in program
0_0_31209840_5741.cpp:16:22: error: stray '\243' in program
0_0_31209840_5741.cpp:16:22: error: stray '\251' in program
0_0_31209840_5741.cpp: In function 'int main()':
0_0_31209840_5741.cpp:7:16: error: expected ')' before '{' token
                {
                ^
0_0_31209840_5741.cpp:13:16: error: expected '(' before 'm'
            if  m-x>0
                ^
0_0_31209840_5741.cpp:15:19: error: 'else' without a previous 'if'
                   else
                   ^