View Compilation Error

0_0_25436139_26655.cpp:6:5: error: missing terminating " character
     while(scanf("%x%x,&b,&a)!=EOF)
     ^
0_0_25436139_26655.cpp: In function 'int main()':
0_0_25436139_26655.cpp:8:27: error: expected '}' before ';' token
         printf("%d\n",a+b);
                           ^
0_0_25436139_26655.cpp:8:27: error: expected ')' before ';' token
0_0_25436139_26655.cpp:8:27: error: expected ')' before ';' token
0_0_25436139_26655.cpp: At global scope:
0_0_25436139_26655.cpp:10:1: error: expected declaration before '}' token
 }
 ^