W3School TIY Editor

#include <iostream> using namespace std; int main() { // 声明整型变量 int length = 4; int width = 6; // 计算矩形面积 int area = length * width; // 输出变量值 cout << "长度为: " << length << "\n"; cout << "宽度为: " << width << "\n"; cout << "矩形面积为: " << area << "\n"; return 0; }