C++ 结构和数组概念 (-Wmissing-braces])

Question

我正在尝试做这样的事情..我有 3 个头文件

1. coordinates.h

typedef struct {
  float x;
  float y;
  float z;
}coordinates3D;

2.plane.h

#include "coordinates.h"
typedef struct{
    coordinates3D plane;
} plane3D;

3.pointArray.h
#include "plane.h"

plane3D points[] ={
    {1.0f,3.74f,0.2354f},
    {6.823f,9.234f,1.097f},
};

和一个cpp文件

4. main.cpp
#include "pointArray.h"
int main(int argc, char **argv)
{
    std::cout<<points[1].plane.x;
    std::cout<<points[0].plane.y;
}

一切正常，但我收到一条警告消息

warning: missing braces around initializer for 'coordinates3D' [-Wmissing-braces]

我不确定如何解决这个警告......

Answer 1

这是因为嵌套结构。只需在值周围添加几个大括号:

plane3D points[] ={
    { { 1.0f,3.74f,0.2354f } },
    { { 6.823f,9.234f,1.097f } },
};

最外层是数组，下一对是 plane3D 结构，再下一个是 coordinates3D 结构。