structis_void; (C++11 起) 检查T是否为 void 类型。若T是类型void、constvoid、volatilevoid或constvolatilevoid,则提供等于true的成员常量value。否则,value等于false。 添加is_void或is_void_v(C++17 起)的特化的程序行为未定义。 模板形参 T-要检查的类型 ...
括号里的void 意思是这个函数没有参数 也就是说你不用给这个函数传递参数
void 被翻译为"无类型"，相应的void * 为"无类型指针"。常用在程序编写中对定义函数的参数类型、返回值、函数中指针类型进行声明。void 的作用 1.对函数返回的限定，这种情况我们比较常见。2.对函数参数的限定，这种情况也是比较常见的。一般我们常见的就是这两种情况：（1）当函数不需要返回值值时，...
But let's assume, for the sake of argument, that ((void*)0) is not a null pointer constant. What difference does it make? (void*)0 is a null pointer constant, whose value is a null pointer of type void*, so by the semantics of parenthesized expressions ((void*)0) also has a v...
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void* equals to char(which is defined as byte).34//ANSI says we cannot do arithmetic on void* because we don't know the type.35//so when we update the top pointer, first regard it as an int, and convert it36//back when we are finished.3738voidPop( Stack S,void*data)39{40if(...
6 int main(void){ 7 int i = 1; 8 while(i <= 5) 9 printf("i = %d, Square = %d\n", i, Square(i++)); 10 11 int j = 1; 12 while(j <= 5) 13 printf("j = %d, SQUARE = %d\n", j, SQUARE(j++)); 14 15 return 0; ...
在下文中一共展示了CFeature::IsInVoid方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。 示例1: DrawQuad ▲▼ voidDrawQuad(intx,inty){std::vector<IWorldObjectModelRenderer*>& opaqueModelRenderers = featureDrawer-...
int w=2; int e; e=add(q+w); 此时你输出e的值看看就是计算结果3。2、1里面回答了 3、当一个函数不是执行一个过程而是来完成某次运算的一般就需要返回值，当然函数未必都需要返回值，有时候可以将返回值，传递成形参，而将函数返回值类型设置为void，返回值是为了方便接收函数执行结果 ...