C++ 循环重复绘图故障

我试图得到一个循环来画圣诞树，但输出是错误的，我试图寻找答案，但我似乎找不到它，我被难住了。答案可能很明显，但我错过了很多，非常感谢您的帮助

#include <iostream>
#include <assert.h>
#include <iomanip>
using namespace std;

const char blank = ' ';
const char leaf = '#';
const char wood = '|';
const int minSize = 4;
const int maxSize = 20;
int treeHeight;
int& getValidHeight(int&);
void drawALineOfFoliage(int);
void drawFoliage(int);
void drawTrunk(int);
void drawAXmasTree(int);
void drawAXmasTree(int treeHeight) {
getValidHeight(treeHeight);
drawFoliage(treeHeight);
drawTrunk(treeHeight);
}
int& getValidHeight(int& treeHeight) {
cout << ("Please enter the size of the tree (4-20):\n");
cin >> treeHeight;

while ((treeHeight < minSize) || (maxSize < treeHeight)) {
    cout << "ERROR: Invalid height! Enter the size of the tree (4-20):\n";
    cin >> treeHeight;

    return treeHeight;
}
}

void drawALineOfFoliage(int treeHeight) {


for (int x = 0; x < treeHeight; ++x){
    for (int y = treeHeight; y > x; --y){
    cout << blank;}
    for (int y = 0; y < x; ++y){
    cout << leaf;}}}

void drawFoliage(int treeHeight) {
int branchLine = 1;
do {
    drawALineOfFoliage(treeHeight);
    branchLine += 1;
} while (branchLine <= (treeHeight - 2));}

void drawTrunk(int treeHeight) {
int trunkLine(1), spaces;
while (trunkLine <= 2) {
    spaces = 1;
    while (spaces <= (treeHeight - 3)) {
        cout << blank;
        spaces += 1;}
    cout << wood << "\n";
    trunkLine += 1;
}
}



int main()
{
drawAXmasTree(treeHeight);
system("pause");}

#包括
#包括
#包括
使用名称空间std；
常量字符空白=“”；
常量char leaf='#'；
常量char wood=“|”；
const int minSize=4；
常量int maxSize=20；
int树高；
int&getValidHeight（int&）；
无效提款保函（内部）；
空抽叶（int）；
空抽屉（内部）；
空抽轴承（内部）；
空心牵引轴（内部树高）{
getValidHeight（树型）；
落叶（树高）；
拉杆箱（树型）；
}
int&getValidHeight（int&treeHeight）{
树高；
while（（树高x；--y）{
cout您的
lineofoliage
似乎为所有
x
绘制线条。在我看来，树叶绘图代码的基本结构应该是：

drawFoliage(height) {
  for(width = 0..height) cout << centeredLine(width);
}

drawCenteredLine(width) {
  return blanks + leafs;
}

Drawleage（高度）{
对于（width=0..height）cout，因此我获取了您的示例代码并对其进行了运行

首先，您的样式和制表符不一致，这会使代码很难阅读

接下来，您的
drawalineofliage
实际上是在绘制整个树，而不是只绘制一行。因此，您缺少了一个
cout'output is error'以及显示正确的输出和您得到的输出：
int&getValidHeight（int&treehight）
为什么在这里使用引用？只需阅读输入并返回一个值。啊-那最好添加“家庭作业”标签。谢谢，我会确保我的格式在将来更易于理解。我已经阅读了你所说的内容和你提出的建议，我知道我错在哪里了，谢谢你的帮助非常感谢！@h3rcul35很高兴能为您提供帮助！
   #
  ##
 ###
####

for (int y = 0; y < x*2; ++y) {
  cout << leaf;
}

do {
    drawALineOfFoliage(treeHeight);
    branchLine += 1;
} while (branchLine <= (treeHeight - 2));

while (spaces <= (treeHeight - 3))

Please enter the size of the tree (4-20):
6

     ##
    ####
   ######
  ########
 ##########
     ||
     ||

Please enter the size of the tree (4-20):
7
       #
      ###
     #####
    #######
   #########
  ###########
 #############
      |||
      |||

#include <iostream>
#include <assert.h>
#include <iomanip>
using namespace std;

const char blank = ' ';
const char leaf = '#';
const char wood = '|';
const int minSize = 4;
const int maxSize = 20;
int treeHeight;
int& getValidHeight(int&);
void drawALineOfFoliage(int);
void drawFoliage(int);
void drawTrunk(int);
void drawAXmasTree(int);

void drawAXmasTree(int treeHeight) {
  getValidHeight(treeHeight);
  drawFoliage(treeHeight);
  drawTrunk(treeHeight);
}

int& getValidHeight(int& treeHeight) {
  cout << ("Please enter the size of the tree (4-20):\n");
  cin >> treeHeight;

  while ((treeHeight < minSize) || (maxSize < treeHeight)) {
    cout << "ERROR: Invalid height! Enter the size of the tree (4-20):\n";
    cin >> treeHeight;
  }

  return treeHeight;
}

void drawALineOfFoliage(int treeHeight) {
  for (int x = 0; x < treeHeight; ++x) {
    for (int y = treeHeight; y > x; --y) {
      cout << blank;
    }
    for (int y = 0; y < x*2; ++y) {
      cout << leaf;
    }
    cout << endl;
  }
}

void drawALineOfFoliageOdd(int treeHeight) {
  for (int x = 0; x < treeHeight; ++x) {
    for (int y = treeHeight; y > x; --y) {
      cout << blank;
    }
    cout << leaf;
    for (int y = 0; y < x*2; ++y) {
      cout << leaf;
    }
    cout << endl;
  }
}

void drawFoliage(int treeHeight) {
  int branchLine = 1;
  drawALineOfFoliageOdd(treeHeight);
  do {

    branchLine += 1;
  } while (branchLine <= (treeHeight - 2));
}

void drawTrunk(int treeHeight) {
  int trunkLine(1), spaces;
  while (trunkLine <= 2) {
    spaces = 1;
    while (spaces <= (treeHeight - 1)) {
      cout << blank;
      spaces += 1;
    }
    cout << wood << wood << wood << endl;
    trunkLine += 1;
  }
}

int main() {
  drawAXmasTree(treeHeight);
  system("pause");
}