View Compilation Error

0_0_38377881_15401.cpp: In function 'int main()':
0_0_38377881_15401.cpp:7:16: error: 'b' was not declared in this scope
         cin >> b;
                ^
0_0_38377881_15401.cpp: At global scope:
0_0_38377881_15401.cpp:9:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_38377881_15401.cpp:10:1: error: expected declaration before '}' token
 }
 ^