您可以在for循环中定义2个相同类型的变量: int main() {
for (int i = 0, j = 0; i < 10; i += 1, j = 2*i) {
cout << j << endl;
}
} 但是定义不同类型的变量是违法的: int main() {
for (int i = 0, float j = 0.0; i < 10; i += 1, j =
In-class initializers(C 11功能)必须用大括号括起来或按照=符号.它们可能不在括号内指定. 这是什么原因? 我对此不是100%肯定,但这可能是为了防止语法模糊.例如,考虑以下类: class BadTimes {
struct Overloaded;
int Overloaded; // Legal, but a very strang
GCC告诉我如下:Transformations.h:16:1:error:initializer元素不是常量 这是代码: const int X_ORIGIN = 1233086;
const int Y_ORIGIN = -4728071;
const int Z_ORIGIN = 4085704;
const int xyzOrigin[
class Node
{
public:
Node *parent; // used during the search to record the parent of successor nodes
Node *child; // used after the search for the application to view the search in reverse