Run id: 145886

Main.cc: In function 'int main()':
Main.cc:7:5: error: 'else' without a previous 'if'
     else if(a>=80) cout<<"B";return 0;
     ^
Main.cc:8:5: error: 'else' without a previous 'if'
     else if(a>=70) cout<<"C";return 0;
     ^
Main.cc:9:5: error: 'else' without a previous 'if'
     else if(a>=60) cout<<"D";return 0;
     ^
Main.cc:10:5: error: 'else' without a previous 'if'
     else cout<<"E";return 0;
     ^