View Compilation Error

1_868_1738_18190.cpp:8:1: error: stray '\243' in program
 n＝(x*x－y*y);
 ^
1_868_1738_18190.cpp:8:1: error: stray '\275' in program
1_868_1738_18190.cpp:8:1: error: stray '\243' in program
1_868_1738_18190.cpp:8:1: error: stray '\255' in program
1_868_1738_18190.cpp:9:1: error: stray '\243' in program
 m＝n/4;
 ^
1_868_1738_18190.cpp:9:1: error: stray '\275' in program
1_868_1738_18190.cpp: In function 'int main()':
1_868_1738_18190.cpp:8:10: error: expected ')' before 'y'
 n＝(x*x－y*y);
          ^
1_868_1738_18190.cpp:8:13: error: 'n' cannot be used as a function
 n＝(x*x－y*y);
             ^
1_868_1738_18190.cpp:9:1: error: 'm' was not declared in this scope
 m＝n/4;
 ^