#include <iostream>
#include <cctype>
#include <cstdlib>

using namespace std;

bool ifNumbers(char array1[])
{
bool case1 = true;
int k = 0;

while (array1[k] != '\0'&& case1 == true)
{
if (isdigit(array1[k]))
    {
case1 = true;
    }
else
    {
case1 = false;
    }
k ++;
}

return case1;
}


bool ifLessthanzero(char array1[])
{

bool case1 = true;
int a = 0;
while (array1[a] != '\0'&& case1 == true)
    {
if (isdigit(array1[a]))
        {
case1 = true;
        }
else if(array1[a] == '-')
        {
case1 = false;
        }
a ++;
    }
return case1;
}


bool inBetween(int val)
{

bool case1 = true;
if (val >= 1 && val <= 105)
{
case1 = true;
}
else
{
case1 = false;
}
return case1;
}


int main()
{

char nums[10000];
cout <<"How many scores would you like to enter?: "<<endl;
cin >> nums;

int counts = atoi(nums);

bool reminder = false;
while(reminder == false)
{
if(!ifNumbers(nums))
{
cout << "Your input is invalid. Please enter a valid number: "<<endl;
cin >> nums;
counts = atoi(nums);
}
else if (!inBetween(counts))
{
cout << "The score is out of range. Please retry. "<<endl;
cin >> nums;
counts = atoi(nums);
}
else
    {
reminder = true;
    }
}
char num[counts];

int unit = 0;
double total = 0;
double number = 0;

while (unit < counts)
{
cout << "Enter "<<unit+1<<": ";
cin >> num;
number = atoi(num);

if(!ifLessthanzero(num))
{
cout<<"That was a negative number. Please retry."<<endl;
num[unit] = '\0';
unit --;
}
else if(!ifNumbers(num)) {
cout<<"You entered character in the score. Please retry."<<endl;
num[unit] = '\0';
unit --;
}
else if(!inBetween(number))
{
cout<<"The score was out of range. Please retry."<<endl;
num[unit] = '\0';
unit --;
}
else
{
number = atoi(num); total = total +number;
}
unit ++;
}

double average = 0;

average = total/counts;

cout << "You entered "<<counts<<" scores."<<endl;
cout << "The sum of the numbers you entered is "<<total<<"."<<endl;
cout << "The average of the numbers you entered is "<<average<<"."<<endl;
    return 0;
}