C程序打印弗洛伊德三角形

弗洛伊德三角形是具有第一个自然数的三角形。

1
2     3
4     5     6
7     8     9     10
11     12     13     14     15

下面的程序打印n行的弗洛伊德三角形。

C++

#include 
using namespace std;
  
void printFloydTriangle(int n) 
{ 
    int i, j, val = 1; 
    for (i = 1; i <= n; i++) 
    { 
        for (j = 1; j <= i; j++) 
            cout << val++ << " "; 
        cout << endl; 
    } 
} 
  
// Driver Code
int main() 
{ 
    printFloydTriangle(6); 
    return 0; 
} 
  
// This is code is contributed 
// by rathbhupendra

C

// Without using a temporary variable and with only one loop
#include
void floyd(n){
    int i,j=1;
    for (i=1;i<=(n*(n+1))/2;i++){
        printf("%d ",i);
        if(i==(j*(j+1))/2){
            printf("\n");
            j++;
        }
    }
}
  
int main(){
    floyd(6);
}
  
//This code is contributed by Vishal B

Java

// Java program to print
// Floyd's triangle
class GFG
{
    static void printFloydTriangle(int n)
    {
        int i, j, val = 1;
        for (i = 1; i <= n; i++)
        {
            for (j = 1; j <= i; j++)
            {
                System.out.print(val + " ");
                val++;
            }
            System.out.println();
                  
        }
    }
          
    // Driver Code
    public static void main(String[] args) 
    {
        printFloydTriangle(6);
    }
}

Python3

# Python3 program to print
# Floyd's triangle
def loydTriangle(n):
  
    val = 1
    for i in range(1, n + 1):
  
        for j in range(1, i + 1):
            print(val, end = " ")
            val += 1
          
        print("")
  
loydTriangle(6)
  
# This code is contributed by
# Smitha Dinesh Semwal

C#

// C# program to print
// Floyd's triangle
using System;
  
class GFG
{
    static void printFloydTriangle(int n)
    {
        int i, j, val = 1;
        for (i = 1; i <= n; i++)
        {
            for (j = 1; j <= i; j++)
            {
                Console.Write(val + " ");
                val++;
            }
            Console.WriteLine();
        }
    }
          
    // Driver Code
    public static void Main() 
    {
        printFloydTriangle(6);
    }
}

输出：

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
16 17 18 19 20 21