/in/foo.cc:8:10: error: stray '\357' in program
  int i, j；
          ^
/in/foo.cc:8:11: error: stray '\274' in program
  int i, j；
           ^
/in/foo.cc:8:12: error: stray '\233' in program
  int i, j；
            ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:9:2: error: expected initializer before 'long'
  long long m=0;
  ^~~~
/in/foo.cc:11:8: error: 'j' was not declared in this scope
   for (j = 0; j < n; j++)
        ^
/in/foo.cc:14:4: error: 'm' was not declared in this scope
    m = m + a[i][j];
    ^
/in/foo.cc:16:10: error: 'm' was not declared in this scope
  cout << m;
          ^
/in/foo.cc:7:24: warning: unused variable 'b' [-Wunused-variable]
  int a[100][100] = {0},b[100][100] = { 0 };
                        ^