三角形类c++

我将非常感谢任何可以提供的帮助。我正在开发一个基于三条边输入计算三角形的类。不过，我对分析的一些算法相当困惑。例如，我觉得三角形算法的最大， 最小和类型是正确的，但是前两个返回零，并且类型返回等边是等腰。最后，我几乎完全迷失在 isttriangle 和isRight上。我知道他们错了，但我不知道该做些什么调整。:/

#include "Triangle.h"
#include<iostream>
#include<string>
using namespace std;
Triangle::Triangle()
{
    s1 = 1;
    s2 = 1;
    s3 = 1;
}
Triangle::Triangle(int x)
{
    s1 = x;
    s2 = x;
    s3 = x;
}
Triangle::Triangle(int x, int y, int z)
{
    s1 = x;
    s2 = y;
    s3 = z;
}
void Triangle::setSide1(int x)
{
    s1 = x;
}
void Triangle::setSide2(int x)
{
    s2 = x;
}
void Triangle::setSide3(int x)
{ 
    s3 = x;
}
int Triangle::getSide1()
{
    return s1;
}
int Triangle::getSide2()
{
    return s2;
}
int Triangle::getSide3()
{ 
    return s3;
}
int Triangle::perimeter()
{
    int perim = s1 + s2 + s3;
    return perim;
}
int Triangle::largestSide()
{
    int largest = 0;
    if (s1 >= s2 && s3)
        s1 = largest;
    else if (s2 >= s1 && s3)
        s2 = largest;
    else 
        s3 = largest;
    return largest;
}
int Triangle::smallestSide()
{
    int smallest = 0;
    if (s1 <= s2 && s1 <= 3)
        smallest = s1; 
    else if (s2 <= s1 && s2 <= s3)
        smallest = s2;
    else
        smallest = s3;
    return smallest;
}
bool Triangle::isRight()
{
    if (s3 == s1 + s2 || s2 == s1 + s3 || s1 == s2 + s3)
        return true;
    else
        return false;

}
bool Triangle::isTriangle()
{
    if (s1 + s2 < s3 || s1 + s3 < s2 || s2 + s3 < s1)
        return false;
    else
        return true;
}
string Triangle::typeTriangle()
{
    if (&Triangle::isTriangle == false)
        return "This is not a triangle";
    else if (s1 == s2 == s3)
        return "Equilateral";
    else if ((s1 == s2 && s1 != s3 && s2 != s3) || (s2 == s3 && s2 != s1 && s3 != s1))
    return "Isosceles";
    else if (s1 != s2 && s2 != s3)
        return "Scalene";

}