Run id: 142882

Main.cc: In function 'int main()':
Main.cc:6:20: error: 'n1' was not declared in this scope
     for(int i=1;i<=n1;i++){
                    ^
Main.cc:7:6: error: 'a' was not declared in this scope
      a+=i;   
      ^
Main.cc:9:11: error: 'a' was not declared in this scope
     cout<