lvalue required in function push

lvalue required in function main lvalue required in function proess Error turboc.c 11:Lvalue required in function lvalue required in fuction Lvalue required in function sign.sign是我自己定义的函数. 错误提示是lvalue required in function main 请高手帮忙看看~ lvalue required 是什么意思啊 “pointer required on left side of -> in function creatlist"是 non-lvalue in assignment non-lvalue in assignment是什么意思 required in 这个C编译错误提示什么意思.lvalue required as left operand of assignment