Run id: 100612

Main.cc: In function 'int main()':
Main.cc:8:12: error: the value of 'a' is not usable in a constant expression
    case a>=90:
            ^
Main.cc:5:9: note: 'int a' is not const
     int a;
         ^
Main.cc:8:12: error: the value of 'a' is not usable in a constant expression
    case a>=90:
            ^
Main.cc:5:9: note: 'int a' is not const
     int a;
         ^
Main.cc:9:14: error: 'A' was not declared in this scope
        cout<=a<90:
              ^
Main.cc:11:11: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    case 70>=a<90:
           ^
Main.cc:12:14: error: 'B' was not declared in this scope
        cout<=a<70:
              ^
Main.cc:14:11: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
    case 60>=a<70:
           ^
Main.cc:14:4: error: duplicate case value
    case 60>=a<70:
    ^
Main.cc:11:4: error: previously used here
    case 70>=a<90:
    ^
Main.cc:15:15: error: 'C' was not declared in this scope
         cout<