View Compilation Error

0_0_29621352_3441.cpp:19:17: error: stray '\243' in program
                 num=0；
                 ^
0_0_29621352_3441.cpp:19:17: error: stray '\273' in program
0_0_29621352_3441.cpp: In function 'int main()':
0_0_29621352_3441.cpp:20:9: error: expected ';' before 'for'
         for(int j=1;j<=2*n;j++)
         ^
0_0_29621352_3441.cpp:20:21: error: 'j' was not declared in this scope
         for(int j=1;j<=2*n;j++)
                     ^