C++ 實例 - 創建各類三角形圖案
創建各類三角形圖案。
實例
#include <iostream>
using namespace std;
int main()
{
    int rows;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = 1; i <= rows; ++i)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << "* ";
        }
        cout << "\n";
    }
    return 0;
}
以上程式執行輸出結果為:
* * * * * * * * * * * * * * *
實例
#include <iostream>
using namespace std;
int main()
{
    int rows;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = 1; i <= rows; ++i)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << j << " ";
        }
        cout << "\n";
    }
    return 0;
}
以上程式執行輸出結果為:
1 1 2 1 2 3 1 2 3 4 1 2 3 4 5
實例
#include <iostream>
using namespace std;
int main()
{
    char input, alphabet = 'A';
    cout << "輸入最後一個大寫字母: ";
    cin >> input;
    for(int i = 1; i <= (input-'A'+1); ++i)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << alphabet << " ";
        }
        ++alphabet;
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
A B B C C C D D D D E E E E E
實例
#include <iostream>
using namespace std;
int main()
{
    int rows;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = rows; i >= 1; --i)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << "* ";
        }
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
* * * * * * * * * * * * * * *
實例
#include <iostream>
using namespace std;
int main()
{
    int rows;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = rows; i >= 1; --i)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << j << " ";
        }
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
1 2 3 4 5 1 2 3 4 1 2 3 1 2 1
實例
#include <iostream>
using namespace std;
int main()
{
    int space, rows;
    cout <<"輸入行數: ";
    cin >> rows;
    for(int i = 1, k = 0; i <= rows; ++i, k = 0)
    {
        for(space = 1; space <= rows-i; ++space)
        {
            cout <<"  ";
        }
        while(k != 2*i-1)
        {
            cout << "* ";
            ++k;
        }
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
        *
      * * *
    * * * * *
  * * * * * * *
* * * * * * * * *
實例
#include <iostream>
using namespace std;
int main()
{
    int rows, count = 0, count1 = 0, k = 0;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = 1; i <= rows; ++i)
    {
        for(int space = 1; space <= rows-i; ++space)
        {
            cout << "  ";
            ++count;
        }
        while(k != 2*i-1)
        {
            if (count <= rows-1)
            {
                cout << i+k << " ";
                ++count;
            }
            else
            {
                ++count1;
                cout << i+k-2*count1 << " ";
            }
            ++k;
        }
        count1 = count = k = 0;
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
        1
      2 3 2
    3 4 5 4 3
  4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5
實例
#include <iostream>
using namespace std;
int main()
{
    int rows;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = rows; i >= 1; --i)
    {
        for(int space = 0; space < rows-i; ++space)
            cout << "  ";
        for(int j = i; j <= 2*i-1; ++j)
            cout << "* ";
        for(int j = 0; j < i-1; ++j)
            cout << "* ";
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
* * * * * * * * *
  * * * * * * *
    * * * * *
      * * *
        *
實例
#include <iostream>
using namespace std;
int main()
{
    int rows, coef = 1;
    cout << "Enter number of rows: ";
    cin >> rows;
    for(int i = 0; i < rows; i++)
    {
        for(int space = 1; space <= rows-i; space++)
            cout <<"  ";
        for(int j = 0; j <= i; j++)
        {
            if (j == 0 || i == 0)
                coef = 1;
            else
                coef = coef*(i-j+1)/j;
            cout << coef << "   ";
        }
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
           1
         1   1
       1   2   1
     1   3   3    1
   1  4    6   4   1
 1  5   10   10  5   1
實例
#include <iostream>
using namespace std;
int main()
{
    int rows, number = 1;
    cout << "輸入行數: ";
    cin >> rows;
    for(int i = 1; i <= rows; i++)
    {
        for(int j = 1; j <= i; ++j)
        {
            cout << number << " ";
            ++number;
        }
        cout << endl;
    }
    return 0;
}
以上程式執行輸出結果為:
1 2 3 4 5 6 7 8 9 10

 C++ 實例