#include <iostream> using namespace std; int main() { //使用char类型定义变量a并输入 cout << " " << a << endl; cout << " " << a << a << a << endl; cout << a << a << a << a << a << endl; return 0; }输入一个字符,用它来建立一个底边长为5个字符,高为3个字符的字符金字塔(等腰三角形)。 输入: 一个字符。 输出: 由该字符组成的等腰三角形,底边长为5个字符,高为3个字符。 输入样例1: # 输出样例1: # ### ##### 输入样例2: A 输出样例2: A *** ***AA
以下是解决该问题的完整代码: ```cpp #include <iostream> using namespace std; int main() { // 使用char类型定义变量a并输入 char a; cin >> a; // 打印第一行 cout << " " << a << endl; // 打印第二行 cout << " " << a << a << a << endl; // 打印第三行 cout << " " << a << a << a << a << a << endl; return 0; } ``` 解释: 1. 首先定义一个`char`类型的变量`a`,用于存储用户输入的字符,通过`cin`来获取用户输入的字符。 2. 在输出时,等腰三角形的每一行需要有不同数量的空格和字符,根据样例可知第一行前面有4个空格,然后是一个字符;第二行前面有3个空格,然后是3个字符;第三行前面有2个空格,然后是5个字符。 3. 分别按照上述规律使用`cout`来输出每一行,从而形成一个底边长为5个字符,高为3个字符的等腰三角形。 [2025-12-20 19:06:58 | AI问答 | 270点数解答]
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