Run id: 138665

Main.cc: In function 'int main()':
Main.cc:8:4: error: 'sum1' was not declared in this scope
    sum1-=i;
    ^
Main.cc:11:4: error: 'sum1' was not declared in this scope
    sum1+=i;
    ^
Main.cc:14:8: error: 'sum1' was not declared in this scope
  cout<