/in/foo.cc: In function 'int main()':
/in/foo.cc:7:6: error: expected primary-expression before 'int'
  fir(int i=1;i<=n;i++)
      ^~~
/in/foo.cc:7:14: error: 'i' was not declared in this scope
  fir(int i=1;i<=n;i++)
              ^
/in/foo.cc:5:8: warning: unused variable 'a' [-Wunused-variable]
  int n,a,maxa=INT_MIN,sum=1;
        ^
/in/foo.cc:5:10: warning: unused variable 'maxa' [-Wunused-variable]
  int n,a,maxa=INT_MIN,sum=1;
          ^~~~