C++ program to find greatest number between three numbers (logic explained)

Here is the C++ program to find greatest number between three numbers.  It takes input of three numbers from user and display the greatest. You all should have in mind how it works exactly. Here is the algorithm.

Steps

User side:

1: User asked to enter first number

2: User asked to enter second number

3: User asked to enter third number

4: Result is on screen

Developer side

1: Declare variables that are going to be used in program.

2: Input the  first number from user.

3: Input the  second number from user.

4: Input the third number from user.

5: Compare first and second numbers . If first is greater

6: Compare first and third numbers . If first is greater, declare first as greatest number.

7: If third number is greater, declare third as greatest number.

8: If first condition fails, declare second number as the greatest number. 

9: Program ends here.

Code:

#include<iostream>

using namespace std;

void main()

{      //variable declaration

       int a,b,c;

       //input of integer

       cout<<"Input first integer"<<endl;

       cin>>a;

       cout<<"Input second integer"<<endl;

       cin>>b;

       cout<<"Input first integer"<<endl;

       cin>>c;

       //Comparision

      

       if(a>b)

              {

                     if(a>c)

                           {

                                  cout<<"First integer is greater"<<endl;

                           }

                     else {

                                  cout<<"Third integer is greater"<<endl;

                           }

              }

       else

                     {cout<<"Second integer is greater"<<endl;}

             

       system("pause");

}

Output: