// ===================================================================
// Program: for_loop_sum.c
// Date: July 2020
// Author: Jean-Michel Richer
// Email: jean-michel.richer@univ-angers.fr
// ===================================================================
// Description:
//   This program shows how to code a for loop in C and iterate
//   through an array.
//   It is intended to be translated in 32 bits x86 assembly
//   language.
// ===================================================================

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

// Size of the array
const int MAX_ELEMENTS = 8;
// Array of integers that needs to be allocated
int *array;

/**
 * Initialization with random numbers from 1 to 10
 * @param a array of integer
 * @param size size of the array
 */
void random_init(int *a, int size) {
	for (int i = 0; i < size; ++i) {
		a[i] = (rand() % 10) + 1;
	}
}

/**
 * Print contents of the array
 * @param a array of integer
 * @param size size of the array
 */
void print_values(int *a, int size) {
	for (int i = 0; i < size; ++i) {
		printf("%d ", a[i]);
	}
	printf("\n");
}

/**
 * Sum of the values of the array
 * @param a array of integer
 * @param size size of the array
 */
int array_sum(int *a, int size) {
	int sum = 0;
	for (int i = 0; i < size; ++i) {
		sum += a[i];
	}
	return sum;
}

/**
 * main method
 */
int main(int argc, char *argv[]) {
	// initialize random number generator
	srand( time(nullptr) );

	//	allocate array
	array = new int [ MAX_ELEMENTS ];
	
	// initialize araray with random values
	random_init( array, MAX_ELEMENTS );
	// print contents of array
	print_values( array, MAX_ELEMENTS );
	
	// compute and print sum of values of array
	printf( "sum=%d\n", array_sum( array, MAX_ELEMENTS ) );
	
	// free resources
	delete [] array;
	
	return EXIT_SUCCESS;
}