C++ 实例创建各类三角形图案。
实例
#include <iostream>using namespace std; int main(){ int rows; cout << "输入行数: "; cin >> rows; for(int i = 1; i <= rows; ++i) { for(int j = 1; j <= i; ++j) { cout << "* "; } cout << "\n"; } return 0;}
以上程序执行输出结果为：
** ** * ** * * ** * * * *
实例
#include <iostream>using namespace std; int main(){ int rows; cout << "输入行数: "; cin >> rows; for(int i = 1; i <= rows; ++i) { for(int j = 1; j <= i; ++j) { cout << j << " "; } cout << "\n"; } return 0;}
以上程序执行输出结果为：
11 21 2 31 2 3 41 2 3 4 5
实例
#include <iostream>using namespace std; int main(){ char input, alphabet = 'A'; cout << "输入最后一个大写字母: "; 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;}
以上程序执行输出结果为：
AB BC C CD D D DE E E E E
实例
#include <iostream>using namespace std; int main(){ int rows; cout << "输入行数: "; cin >> rows; for(int i = rows; i >= 1; --i) { for(int j = 1; j <= i; ++j) { cout << "* "; } cout << endl; } return 0;}
以上程序执行输出结果为：
* * * * ** * * ** * * * **
实例
#include <iostream>using namespace std; int main(){ int rows; cout << "输入行数: "; cin >> rows; for(int i = rows; i >= 1; --i) { for(int j = 1; j <= i; ++j) { cout << j << " "; } cout << endl; } return 0;}
以上程序执行输出结果为：
1 2 3 4 51 2 3 4 1 2 31 21
实例
#include <iostream>using namespace std; int main(){ int space, rows; cout <<"输入行数: "; 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;}
以上程序执行输出结果为：
* * * * * * * * * * * * * * * ** * * * * * * * *
实例
#include <iostream>using namespace std; int main(){ int rows, count = 0, count1 = 0, k = 0; cout << "输入行数: "; 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;}
以上程序执行输出结果为：
1 2 3 2 3 4 5 4 3 4 5 6 7 6 5 45 6 7 8 9 8 7 6 5
实例
#include <iostream>using namespace std; int main(){ int rows; cout << "输入行数: "; 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;}
以上程序执行输出结果为：
* * * * * * * * * * * * * * * * * * * * * * * * *
实例
#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;}
以上程序执行输出结果为：
1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1
实例
#include <iostream>using namespace std; int main(){ int rows, number = 1; cout << "输入行数: "; cin >> rows; for(int i = 1; i <= rows; i++) { for(int j = 1; j <= i; ++j) { cout << number << " "; ++number; } cout << endl; } return 0;}
以上程序执行输出结果为：
12 34 5 67 8 9 10