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C++ 实例 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:

1
1 2
1 2 3
1 2 3 4
1 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:

A
B B
C C C
D D D D
E 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 5
1 2 3 4 
1 2 3
1 2
1

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 4
5 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:

1
2 3
4 5 6
7 8 9 10

C++ 实例 C++ 实例