Run id: 129549

Main.cc: In function 'int maim()':
Main.cc:9:23: warning: left operand of comma operator has no effect [-Wunused-value]
  for(int i=0,j=len-1;i=0;i++,j--)
                       ^
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status