Question

Write a basic c++ program to check whether a triangle is valid or not if the three sides are given:
A triangle is valid if the sum of its two sides is greater than the third side.
Let’s say that a, b, c is the sides of the triangle. A valid triangle must satisfy all these conditions:
a + b > c
a + c > b
b + c > a

(2 points) Generate random numbers 1-15 inclusive for each of a, b and c.
Display if the three sides do not make a valid triangle.

(2 points) If the three sides do make a valid triangle, determine whether the triangle is equilateral, scalene or isosceles:
- Equilateral triangle is a triangle in which all three sides are equal.
- Isosceles triangle is a triangle that has two sides of equal length.
- Scalene triangle is a triangle that has three unequal sides.

(2 points) Loop 10 times, each time generate three random sides 1-15 inclusive
Print whether the numbers make an invalid, an equilateral, isosceles or scalene triangle.

(2 points) Print the sum of all a, all b and all c and the resulting triangle.
Print how many of each at the end.

(2 points) Your name, correct indentation, and no redundant (unnecessary) code.

14   2 12 not a valid triangle
11   1   9 not a valid triangle
8   1 10 not a valid triangle
4   5   9 not a valid triangle
14 13   6 is scalene
11 10   6 is scalene
10   8   2 not a valid triangle
7   7   7 is equilateral
1 11 13 not a valid triangle
14   5 14 is isosceles

Total a = 94, b = 63, c = 88
94 63 88 is scalene
6 not valid
1 equilateral
1 isosceles
3 scalene

Answer 1

The Code is well explained in comments itself

#include <iostream>
#include <stdlib.h>   
//importing necessary libraries 
using namespace std;

int equi=0,scal=0,nottrain=0,isoc=0;//global varaible for counting traigle types
string traingleType(int a,int b,int c) //function which returns traingle type
{
    if(a==b && b==c && a==c) {equi++; return " is equilateral";} //condition for equilateral traingle 
    else if(a==b || b==c || a==c) {isoc++;return " is isosceles ";} //condition for isoceles traingle
     else{scal++; return " is scalene ";} //condition for scalene traingle
}
int main()
{
    int A=0,B=0,C=0,a,b,c; // declaring varaibles for total sum sides and separate sides
    for (int i=0;i<10;i++)
    {
        a=rand() % 15 + 1; // random number for side 1 between 1 to 15 inclusive
        b=rand() % 15 + 1; // random number for side 2 between 1 to 15 inclusive
        c=rand() % 15 + 1; // random number for side 2 between 1 to 15 inclusive
        A=A+a;B=B+b;C=C+c; //for sum of all sides
        if(a+b>c && b+c>a && a+c>b) // condition for valid traingle
        {
          cout<<a<<" "<<b<<" "<<c<<traingleType(a,b,c)<<"\n"; // printint traingle type
        }
        else{
            nottrain++; //updating not valid traingle count
            cout<<a<<" "<<b<<" "<<c<<" not a valid triangle"<<"\n";
        }
    }
    cout<<"\nTotal a = "<<A<<" b = "<<B<<" c = "<<c<<"\n";
    //printing sum of all sides
    if(A+B>C && B+C>A && A+C>B) // condition for valid traingle
        {
          cout<<A<<" "<<B<<" "<<C<<traingleType(a,b,c)<<"\n";
        }
        else{
            cout<<A<<" "<<B<<" "<<C<<" not a valid triangle"<<"\n";
        }
   cout <<nottrain<<" not valid"<<"\n";
   cout <<equi<<" equilateral"<<"\n";
   cout <<isoc<<" isoceles"<<"\n";
   cout <<scal<<" scalene"<<"\n";
   //printing respective counts for traingle types
    return 0;
}

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Thanks