Write a C program to pass an array containing age of person to a function

BY Team Educate
October 30, 2024
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#include <stdio.h>

float average(float a[]); // Function prototype

int main() {
float avg, c[] = {23.4, 55, 22.6, 3, 40.5, 18}; // Array of ages
avg = average(c); // Pass the array to the average function
printf("Average age = %.2f", avg); // Print the average
return 0;
}

float average(float a[]) {
int i;
float avg, sum = 0.0; // Initialize sum to 0.0

for (i = 0; i < 6; ++i) { // Loop through each element of the array
sum += a[i]; // Add each age to the sum
}

avg = (sum / 6); // Calculate the average
return avg; // Return the average
}

Header File Inclusion
```
#include <stdio.h>
```
This line includes the standard input-output library, which is necessary for using the printf function
Function Prototype
```
float average(float a[]);
```
This line declares the average function, indicating that it will take an array of floats as an argument and return a float value.
Main Function
```
int main() {
    float avg, c[] = {23.4, 55, 22.6, 3, 40.5, 18}; 
    avg = average(c); 
    printf("Average age = %.2f", avg); 
    return 0;
}
```
- An array c is declared and initialized with six float values representing ages.
- The average function is called with the array c passed as an argument. In C, when you pass an array to a function, you actually pass a pointer to its first element.
- The returned average is stored in the variable avg.
- Finally, the average is printed to the console using printf.
Average Function
```
float average(float a[]) {
    int i;
    float avg, sum = 0.0; 

    for (i = 0; i < 6; ++i) {
        sum += a[i]; 
    }

    avg = (sum / 6); 
    return avg; 
}
```
- The function initializes a variable sum to 0.0 to accumulate the total of the ages.
- A for loop iterates through the array, summing each age to sum.
- After the loop, the average is calculated by dividing sum by the number of elements (6).
- The calculated average is returned to the caller.

Output

When the program runs, it computes the average of the ages in the array c and outputs the result formatted to two decimal places. The expected output would be: