这个C编译错误提示什么意思.lvalue required as left operand of assignment

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这个C编译错误提示什么意思.lvalue required as left operand of assignment
这段C代码i == head->next=NULL:head->next = p;
提示错误lvalue required as left operand of assignment|,

运算符优先级问题,=号的优先级低于?:运算符,
i == head->next=NULL:head->next = p;相当于(i == head->next=NULL:head->next) = p;
head->next = p需要用括号括起来,改成
i == (head->next=NULL):(head->next = p);

这个C编译错误提示什么意思.lvalue required as left operand of assignment c语言 for(j=4;j>=0;j--) [Error] lvalue required as left operan 错误提示是lvalue required in function main 请高手帮忙看看~ left operand must be l-value什么意思 non-lvalue in assignment KEIL C 中遇到问题:error C213:left side of asn-op not an lvalue Error turboc.c 11:Lvalue required in function lvalue required in fuction lvalue required 是什么意思啊 non-lvalue in assignment是什么意思这段C代码i == head->next=NULL:head->next = p; 提示错误lvalue require lvalue required in function main