Question

所以我已经创建了一个程序来创建一个正方形或矩形的框架，我试图让它在正方形/矩形内输出星星，所以它已经填满了一半。就像这样：

********
** * * *
* * * **
** * * *
********

到目前为止，这是我的代码：

void frameDisplay(int width, int height) { 
cout <<"What should the width be?\n";
cin >> width;
cout <<"What should the height be?\n\n";
cin >> height;
if(width < 2){
cout <<"Width must be greater than two.\n";
cout <<"What should the width be? \n";
cin >> width;
}if(height < 2){
cout <<"Height must be greater than two.\n";
cout <<"What should the height be? \n";
cin >> height;
}
cout << string(width, '*') << endl;
for(int j = 0; j < height - 2; ++j)
cout << '*'<< string(width - 2, ' ')<< '*' << endl;
cout << string(width, '*') << endl;
}
int main(){
  int width=0, height=0;
  frameDisplay(width, height);
}

输出：

What should the width be?
5
What should the height be?

7
*****
*   *
*   *
*   *
*   *
*   *
*****

Answer 1

我建议您对代码进行一些重组。

创建单独的函数：

接受用户输入。
以std::vector<std::vector<char>>。
显示帧数据。

然后从main打电话给他们。

#include <iostream> 
#include <vector> 
#include <utility> 

using namespace std;

std::pair<int, int> getUserInput()
{
   int width;
   cout <<"What should the width be?\n";
   cin >> width;

   int height;
   cout <<"What should the height be?\n";
   cin >> height;

   return std::make_pair(width, height);
}

void fillUpFrame(std::vector<std::vector<char>>& frameData)
{
   // Add the logic to fill up the frame data.
}

对于displayFrame，如果您有C ++ 11编译器，请使用：

void displayFrame(std::vector<std::vector<char>> const& frameData)
{
   for ( auto const& row : frameData )
   {
      for ( auto cell : row )
      {
         cout << cell;
      }
      cout << endl;
   }
   cout << endl;
}

否则，请使用：

void displayFrame(std::vector<std::vector<char>> const& frameData)
{
   suze_t rows = frameData.size();
   for ( size_t i = 0; i < rows; ++i )
   {
      size_t cols = frameData[i].size();
      for ( size_t j = 0; j < cols; ++j )
      {
         int cell = frameData[i][j];
         cout << cell;
      }
      cout << endl;
   }
   cout << endl;
}

main：

int main(){

   // Get the user input.
   std::pair<int, int> input = getUserInput();
   int width = input.first;
   int height = input.second;

   // Create a 2D vector to hold the data, with all the elements filled up
   // with ' '.
   std::vector<std::vector<char>> frameData(height, std::vector<char>(width, ' '));

   // Fill up the frame data.
   fillUpFrame(frameData);

   // Display the frame data
   displayFrame(frameData);

   return 0;
}

C ++创建半填充矩形

1 个答案: