View Compilation Error

0_0_20528120_16036.cpp: In function 'int main()':
0_0_20528120_16036.cpp:57:20: error: 'A' was not declared in this scope
         cout<<endl;A;
                    ^
0_0_20528120_16036.cpp:58:9: error: 'else' without a previous 'if'
         else
         ^