Run id: 83932

Main.cc: In function 'int a(int)':
Main.cc:5:17: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  for(int i=1;i<=a;i++){
                 ^
Main.cc:6:4: warning: statement has no effect [-Wunused-value]
   s+s*i;
    ^