Run id: 141216

Main.cc: In function 'int main()':
Main.cc:6:9: error: redeclaration of 'int b'
     int b=8
         ^
Main.cc:5:9: note: 'int b' previously declared here
     int b=20;
         ^
Main.cc:4:6: warning: unused variable 'a' [-Wunused-variable]
  int a=10;
      ^
Main.cc:5:9: warning: unused variable 'b' [-Wunused-variable]
     int b=20;
         ^