C++ 程序使用边长检查三角形是否有效

编写一个 C++ 程序，使用 If else 语句和示例，通过边长检查三角形是否有效。

#include<iostream>
using namespace std;

int main()
{
	int side1, side2, side3;
	
	cout << "\nPlease Enter Three Sides of a Triangle =  ";
	cin >> side1 >> side2 >> side3;
	
	if( (side1 + side2 > side3) && (side2 + side3 > side1) && (side1 + side3 > side2) )
  	{
  		cout << "\nThis is a Valid Triangle";
  	}
  	else
    	cout << "\nThis is an Invalid Triangle";
		
 	return 0;
}

输出 2

Please Enter Three Sides of a Triangle =  20 40 50

This is a Valid Triangle

C++ 程序使用边长检查三角形是否有效 示例 2

#include<iostream>
using namespace std;

int main()
{
	int side1, side2, side3;
	
	cout << "\nPlease Enter Three Sides of a Triangle =  ";
	cin >> side1 >> side2 >> side3;
	if(side1 + side2 > side3)
  	{
  		if(side2 + side3 > side1)
  		{
  			if(side1 + side3 > side2)
  			{
  				cout << "\nThis is a Valid Triangle";			
			}
			else
			{
				cout << "\nThis is an Invalid Triangle";
			}			  
		}
		else
		{
			cout << "\nThis is an Invalid Triangle";
		}
 	}
  	else
    	cout << "\nThis is an Invalid Triangle";
		
 	return 0;
}

Please Enter Three Sides of a Triangle =  25 65 56

This is a Valid Triangle

C++ 程序 使用边长查找三角形是否有效 示例 3

#include<iostream>
using namespace std;

int main()
{
	int side1, side2, side3, flag = 0;
	
	cout << "\nPlease Enter Three Sides of a Triangle =  ";
	cin >> side1 >> side2 >> side3;
	
	if(side1 + side2 > side3)
  	{
  		if(side2 + side3 > side1)
  		{
  			if(side1 + side3 > side2)
  			{
  				flag = 1;				
			}			  
		}
 	}
 	if(flag == 1)
 	{
 		cout << "\nThis is a Valid Triangle";
	}
	else
	{
		cout << "\nThis is an Invalid Triangle";
	} 
 	return 0;
}

Please Enter Three Sides of a Triangle =  7 5 6

This is a Valid Triangle