View Compilation Error

1_868_1805_19156.cpp:8:1: error: stray '\243' in program
 n＝x*x－y*y;
 ^
1_868_1805_19156.cpp:8:1: error: stray '\275' in program
1_868_1805_19156.cpp:8:1: error: stray '\243' in program
1_868_1805_19156.cpp:8:1: error: stray '\255' in program
1_868_1805_19156.cpp:9:1: error: stray '\243' in program
 m＝n/4;
 ^
1_868_1805_19156.cpp:9:1: error: stray '\275' in program
1_868_1805_19156.cpp: In function 'int main()':
1_868_1805_19156.cpp:8:4: error: expected ';' before 'x'
 n＝x*x－y*y;
    ^
1_868_1805_19156.cpp:9:4: error: expected ';' before 'n'
 m＝n/4;
    ^