View Compilation Error

0_0_15929693_1014.cpp:8:1: error: stray '\250' in program
 b=–a；
 ^
0_0_15929693_1014.cpp:8:1: error: stray '\243' in program
0_0_15929693_1014.cpp:8:1: error: stray '\273' in program
0_0_15929693_1014.cpp:11:1: error: stray '\243' in program
 printf("%.2lf\n",b)；
 ^
0_0_15929693_1014.cpp:11:1: error: stray '\273' in program
0_0_15929693_1014.cpp: In function 'int main()':
0_0_15929693_1014.cpp:8:4: error: 'Ca' was not declared in this scope
 b=–a；
    ^
0_0_15929693_1014.cpp:12:1: error: expected ';' before '}' token
 }
 ^