c++ - 如何将常量中的值设置为struct c++

Question

我无法为结构中的常量赋值，请遵循代码:

#include <iostream>
#include <stdio.h>

typedef struct
{
  float a;
  float b;
  float c;
  float intensity;
} PointXYZI;

typedef struct structParent{
  int x;
  int y;
  const PointXYZI* xyzi;
} structParent;

int main()
{

  float o = 10.f, p = 5.0f, z = 96.0f;

  PointXYZI points = {o, p, z};

  const structParent *data = {0,0, &points};

  std::cout << " *-* " << data.xyzi->c << std::endl;
  std::cout << " *-* " << points.a << std::endl;


  return 0;
}

此代码出现以下错误:

错误:标量对象“data”需要初始化器 const structParent *data = {0,0, &points} 中的一个元素；

谢谢...

Answer 1

@UnholySheep 的答案的示例版本解释如下。

void someFunc(const structParent &x)
//                             ^^^^^^
{
  std::cout << " @_@ " << x.xyzi->c << std::endl;
}

int main()
{

  float o = 10.f, p = 5.0f, z = 96.0f;

  PointXYZI points = {o, p, z, 0};
  //                        ^^^^^
  const structParent data = {0,0, &points};
  //                ^^^
  std::cout << " *-* " << data.xyzi->c << std::endl;
  std::cout << " *-* " << points.a << std::endl;

  someFunc(data);
  //      ^^^^^^^
  return 0;
}