/in/foo.c: In function 'main':
/in/foo.c:7:9: warning: right-hand operand of comma expression has no effect [-Wunused-value]
  for(n=1,n<=m,n++)
         ^
/in/foo.c:7:18: error: expected ';' before ')' token
  for(n=1,n<=m,n++)
                  ^
/in/foo.c:7:18: error: expected expression before ')' token