C Program - Find the Average of Integers using a Function with Return Value

This code defines a function avg_calc that calculates the average of two integer numbers and returns the result as a float value. The main function uses this function to calculate the average of two numbers inputted by the user. 

#include <stdio.h>

float avg_calc(int x, int y)
{
    float result = (x + y) / 2;
    return result;
}

int main()
{
    int number1, number2;
    float average;

    printf("Simple Average Calculator: \n");

    printf("Enter First Number: \n");
    scanf("%d", &number1);

    printf("Enter Second Number: \n");
    scanf("%d", &number2);

    average = avg_calc(number1, number2);

    printf("Average of %d and %d is: %10.2f \n", number1, number2, average);

    return 0;
}

Result:

Simple Average Calculator:
Enter First Number:
10
Enter Second Number:
6
Average of 10 and 6 is:       8.00

Process returned 0 (0x0)   execution time : 5.091 s
Press any key to continue.

The program starts by including the stdio.h header file which provides input/output functions like printf and scanf.

The avg_calc function takes two integer parameters, x and y. It calculates their average by adding them and dividing the result by 2. The average is stored in a float variable result and returned.

The main function starts by declaring three variables: number1, number2, and average. It then prints a prompt asking the user to enter the first number using printf and reads the user's input using scanf.

Similarly, it prompts the user to enter the second number and reads their input using scanf.

Next, it calls the avg_calc function with the two numbers inputted by the user, and stores the returned value in the average variable.

Finally, the main function prints the result using printf with a formatted string that displays the inputted numbers and the calculated average with two decimal places.

The program ends by returning 0 from the main function.