我有两个公开课;一个静态 (DesktopOps
),一个非静态 (Args
),我正在尝试初始化 main 中静态类的静态变量。
我不断收到的错误信息是:
main.cpp:25: error: qualified-id in declaration before '=' token
Point DesktopOps::window_coords = Point(arg.topleft_x, arg.topleft_y);
^
main.cpp:26: error: qualified-id in declaration before '=' token
Point DesktopOps::window_dims = Point(arg.width, arg.height);
^
这是一个 MWE:
#include <opencv2/opencv.hpp>
using namespace cv;
struct Args{
int topleft_x, topleft_y, width, height;
Args(){
topleft_x = topleft_y = width = height = -1;
}
};
struct DesktopOps {
static Point window_coords;
static Point window_dims;
};
int main(){
Args arg();
Point DesktopOps::window_coords = Point(arg.topleft_x, arg.topleft_y);
Point DesktopOps::window_dims = Point(arg.width, arg.height);
}
最佳答案
我真的不明白你想做什么....但是静态变量必须在全局范围内,在主函数之外创建:
Args arg;
Point DesktopOps::window_coords = Point(arg.topleft_x, arg.topleft_y);
Point DesktopOps::window_dims = Point(arg.width, arg.height);
int main(){
}
但是这个全局的Args变量没有意义....
关于c++ - '=' token 之前声明中的 qualified-id,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26454099/