【分享】一些经典的C/C++语言基础算法及代码（二）

来源：互联网发布：筋长一寸寿延十年知乎编辑：程序博客网时间：2024/06/05 09:49

阅读到的一些经典C/C++语言算法及代码。在此分享。

4、打印三角形和金字塔

用" * "打印半金字塔

#include <iostream>using namespace std;int main(){    int rows;    int i, j;    cout << " Enter the number of rows: " << endl;    cin >> rows;    for (i = 1; i <= rows; ++i)  // i行    {        for (j = 1; j <= i; ++j)  // j列        {            cout << "* ";        }        cout << "\n" << endl;    }}

用数字打印三角形

#include <iostream>using namespace std;int main(){    int rows, i, j;    cout << " Enter the number of rows: " << endl;    cin >> rows;    for (i = 1; i <= rows; ++i)    {        for (j = 1; j <= i; ++j)        {            cout << j << " "; // 将上一个代码中输出的"*"换为"j "即可        }        cout << "\n" << endl;    }}

用"*"打印金字塔

//将金字塔从中线分为左右各一半#include <iostream>using namespace std;int main(){    int rows, i, space;    int j = 0;    cout << " Enter the number of rows: " << endl;    cin >> rows;    for(i = 1; i <= rows; ++i)    {        for (space = 1; space <= rows - i; ++space)        {            cout << "  ";        }        while (j != 2 * i - 1)        {            cout << "* ";            ++j;        }        j = 0;        cout << "\n";    }    return 0;}

用"*"打印倒金字塔

//从上到下变位从下到上#include <iostream>using namespace std;int main(){    int rows, i, j, space;    cout << " Enter the number of rows: " << endl;    cin >> rows;    for(i = rows; i >= 1; --i)    {        for (space = 0; space <= rows - i; ++space)            cout << "  ";        for (j = i; j <=2 * i - 1; ++j)            cout << "* ";        for (j = 0; j < i-1; ++j)            cout << "* ";        cout << "\n";    }    return 0;}

5月4日更新

结合上面的方法，编写出一个打印棱形的程序

#include<iostream>using namespace std;int main(){    int i, j, rows, space;    cout << "Enter rows: " << endl;    cin >> rows;    for(i = 1; i <= rows; ++i)    {        for(space = 1; space <= rows - i; ++space)        {            cout << "  ";        }        for(j = 1; j <= 2 * i - 1; ++j)        {            cout << "* ";        }        cout << endl;    }    for(i = rows - 1; i >= 1; --i)    {        for(space = 1; space <= rows - i; ++space)        {            cout << "  ";        }        for(j = 1; j <= 2 * i - 1; ++j)        {            cout << "* ";        }        cout << endl;    }}

今天看到@天花板的一篇内容可以对上述程序进行优化。代码就不贴了，上连接：21天C语言代码训练营（第二天）

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