// Week 3 Monday Lecture
// Demonstration of memory, scope and lifetime of variables

#include <stdio.h>

// This is a global variable as it is not declared inside a function
// DO NOT USE these in COMP1511
double num = 10;

double add_numbers (double x, double y);

int main(void) {
    double n = 5.5;
    double answer = add_numbers(n, 1.5);
    printf("The answer is %lf\n", answer);
    printf("%d\n", num);
    return 0;
}

// This function returns the sum of 2 given doubles
double add_numbers (double x, double y) {
    double sum;
    num = x + y;
    
    return sum;
}