///////////////////////////////////
//
// program_5 project
//
// created 8/12/21 by tj
// rev 0
//
///////////////////////////////////
//
// Program to practice with arrays
//
// inputs: # of elements, values
// outputs: print array, reversed, largeset, smallest
//
///////////////////////////////////

#include "mbed.h"
#include <stdio.h>                      // only needed when printing

// function prototypes
void fill_array(int the_ary[], int num);
void print_array(const int the_ary[], int num);
void reverse_array(int the_ary[], int num);
int minmax_array(const int the_ary[], int num, char size);

int main(void){
    setbuf(stdout, NULL);  // disable buffering when printing

    // splash 
    printf("\n\nprogram_5\n");
    printf("Using Mbed OS version %d.%d.%d\n\n", 
            MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
    printf("Welcome to my array program\n\n");
    
    int N;
    int tmp;
    
    printf("How large an array would you like? ");
    scanf("%i", &N);
    
    int ary1[N];

    // infinte loop
    while(1){       
        // fill the int array
        fill_array(ary1, N);
        
        // ack
        printf("you entered: ");
        print_array(ary1, N);
        
        // reverse
        printf("The array reversed is: ");
        reverse_array(ary1, N);             // modifies the original array
        print_array(ary1, N);  
        
        // min/max
        tmp = minmax_array(ary1, N, 'L');
        printf("The largest value in your array is: %i\n", tmp);         
        tmp = minmax_array(ary1, N, 'S');
        printf("The smallest value in your array is: %i\n", tmp); 
        
        printf("\n");        

    }// end while
            
   return 0;
}// end main

void fill_array(int the_ary[], int num){
    int i;              // index
    
    // request and read values
    printf("Please enter %i integer values separated by spaces: ", num);
    for(i = 0; i < num; i++)
        scanf("%i", &(the_ary[i]));
    
    return;
}// end fill_array

void print_array(const int the_ary[], int num){
    int i;
    
    // print array
    for(i = 0; i < num; i++)
        printf("%i ", the_ary[i]);
    printf("\n");
    
    return;
}//end print_array

void reverse_array(int the_ary[], int num){
    int i;
    int tmp_ary[num];
    
    // copy array
    for(i = 0; i < num; i++)
        tmp_ary[i] = the_ary[i];
        
    // reverse array
    for(i = 0; i < num; i++)
        the_ary[i] = tmp_ary[(num - 1) - i];
    
    return;
}//end reverse_array

int minmax_array(const int the_ary[], int num, char size){
    int i;
    int min;
    int max;
    
    min = max = the_ary[0];
    
    // find min and max
    for(i = 1; i < num; i++){
        if(the_ary[i] < min)
            min = the_ary[i];
        if(the_ary[i] > max)
            max = the_ary[i];
    }// end for
    
    // return the desired value
    if(size == 'L')
        return max;
    else
        return min;
        
}//end minmax_array