/in/foo.c: In function 'main':
/in/foo.c:13:20: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   13 |         for(i=0;i<2,i++){
      |                    ^
/in/foo.c:13:24: error: expected ';' before ')' token
   13 |         for(i=0;i<2,i++){
      |                        ^
      |                        ;