#include <stdio.h>
#include <stdlib.h>
#include <vector>
using namespace std;
const double eps=1e-6;
void level();
void hm();
int n;
double a[100100];
int main()
{
    int iChoice=0;
    do
    {
    printf("1. \tPut the weight of the water here\n");
    printf("2. \tSee the water dissipated\n");
    printf("Choose the number:\n");
    scanf("%d",&iChoice);
    system("cls");
    switch(iChoice)

    {
    case 1:
        level();
        break;
    case 2:
        hm();
        break;
    }
    } while (iChoice !=3);
    return 0;
}
void level()
{
    double w;
    printf("\nPut the water weight here: ");
    scanf("%lf",&w);
    a[++n]=w;
}
void hm()
{
    double Howmuch=0;
    printf("\nThe amount of water you have been drinking is: ");
    for (int i=1; i<n; ++i) Howmuch+=a[i]>a[i+1]?a[i]-a[i+1]:0;
    printf("%.2lf (ML)\n\n",Howmuch);
    int tmp;
    printf("\nPress any button\n");
    scanf("%d",&tmp);
    //cout<<fixed<<setprecision(2)<<Howmuch<<"\n";
}