## Q: Write a program to input three numbers, and calculate and show their average

Today, we will discuss a simple**C++ program that inputs three numbers and calculates and shows average**of these numbers.

### Algorithm: Average

Calculates average of three numbers.1. Start

2. Include iostream.h [Note: this step is only for C++].

3. Declare 5 float variables n1,n2,n3, total and avergae.

4. Display a message (prompt) on screen "Enter First Number:"

5. Input n1.

6. Display a message (prompt) on screen "Enter Second Number:"

7. Input n2.

7. Display a message (prompt) on screen "Enter Third Number:"

8. Input n3.

9. Calculate total= n1 + n2 + n3

10. Calculate average = total / 3

11. Show a message "Average=" and value stored in average variable.

12. Stop

C++ Program To Calculate Average of Three Numbers Input by User at Run time |

Simple C++ Program To Calculate Average of Three Numbers With Algorithm and Flow chart |

### Program Source Code : C++ Program To Calculate Average of Three Numbers With Algorithm and Flow chart

**#include<iostream.h>**

int main()

{

float n1,n2,n3,total,average;

cout << "Enter First Number:";

cin>>n1;

cout<<"Enter Second Number:";

cin>>n2;

cout<<"Enter Third Number:";

cin>>n3;

total=n1+n2+n3;

average=total/3;

cout<<"average="<<average;

return 0;

}

int main()

{

float n1,n2,n3,total,average;

cout << "Enter First Number:";

cin>>n1;

cout<<"Enter Second Number:";

cin>>n2;

cout<<"Enter Third Number:";

cin>>n3;

total=n1+n2+n3;

average=total/3;

cout<<"average="<<average;

return 0;

}