SchoolHW №2

Задача 1)
#include <iostream>
using namespace std;

int main()
{
    int i, n;
    cout << "Number n: ";
    cin >> n;
    i = 1;

    while (i <= n) {
    cout << i << endl;
    i++;
    }
}
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Задача 2)
#include <iostream>
using namespace std;

int main()
{
    int n;
    cout << "Number n: ";
    cin >> n;
    int i = 1, sum = 0;

    while (i <= n) {
    sum += i;
    i++;
    }
    cout << "Total sum: " << sum << endl;
}
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Задача 3)
#include <iostream>
using namespace std;

int main()
{
    int n, i = 1;
    cout << "Number n: ";

    if (n <= 0){
        cout << "No numbers!";
        n = 1;
    }
    cin >> n;

    while (i < n) {
        if (i % 2 == 0)
                cout << i << endl;

    i++;
    }

}
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Задача 4)
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int x, y, power;
    cout << "x: ";
    cin >> x;

    cout << "y: ";
    cin >> y;

    power = 1;

    while (pow(x, power) < y){
        cout << power << endl;
        power ++;
    }
}
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Задача 5)
#include <iostream>
using namespace std;

int main()
{
    int num, sum;
    cout << "Number: ";
    cin >> num;

    while (num != 0){
        sum += num;
        cout << "Number: ";
        cin >> num;
    }
    cout << "Total sum: " << sum;
}
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Задача 6)
#include <iostream>
using namespace std;

int main()
{
    int num, mul = 1;
    cout << "Number: ";
    cin >> num;

    while (num != 0){
        mul *= num;
        cout << "Number: ";
        cin >> num;
    }
    cout << "Total multiplication: " << mul;
}
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Задача 7)
#include <iostream>
using namespace std;

int main()
{
    int num, count;
    cout << "Number: ";
    cin >> num;

    while (num != 0){
        count += 1;
        cout << "Number: ";
        cin >> num;
    }
    cout << "Total count: " << count;
}
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Задача 8)
#include <iostream>
#include <bits/stdc++.h>
using namespace std;



int main()
{
    vector<int> numbers;
    int n;
    cout << "Number n: ";
    cin >> n;

    while (n != 0){
        numbers.push_back(n);
        cout << "Number n: ";
        cin >> n;
    }

    cout << "Max Element: " << *max_element(numbers.begin(), numbers.end()) << endl;
    cout << "Min Element: " << *min_element(numbers.begin(), numbers.end());

    return 0;
}
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Задача 9)
#include <iostream>
using namespace std;

int main()
{
    int num, possitvie_counter = 1;

    while (possitvie_counter <= 3){

    cout << "Enter a number: ";
    cin >> num;

    if (num > 0)
        possitvie_counter++;


    }
    cout << "You've entered 3 possitive numbers: " << possitvie_counter;
    return 0;
}
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Задача 10)
Начин 1)
#include <iostream>
using namespace std;

int main() {
    int n, reversedNumber = 0, remainder;

    cout << "Enter an integer: ";
    cin >> n;

    while(n != 0) {
        remainder = n%10;
        reversedNumber = reversedNumber*10 + remainder;
        n /= 10;
    }

    cout << "Reversed Number = " << reversedNumber;

    return 0;
}

Начин 2)
#include <iostream>
#include <sstream>
#include <bits/stdc++.h>
using namespace std;

int main()
{
    int num;

    cout << "Enter a number: ";
    cin >> num;

    stringstream ss;
    ss << num;

    string number_to_str;
    ss >> number_to_str;

    reverse(number_to_str.begin(), number_to_str.end());
    cout << "The number " << num << " in reversed is " + number_to_str;

    return 0;
}
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Задача 11)
#include <iostream>
using namespace std;


int main()
{
    int num, sum = 0, int_char;

    cout << "Enter a number: ";
    cin >> num;

    while (num > 0) {
        int_char = num % 10;
        sum = sum + int_char;
        num = num / 10;
    }

    cout << "Sum is: " << sum << endl;
    return 0;
}
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Задача 12)
#include <iostream>
using namespace std;


int main()
{
    int num, num_numerical = 0, int_char;
    cout << "Enter a number: ";
    cin >> num;

    while (num > 0) {
        int_char = num % 10;
        num = num / 10;
        num_numerical++;
    }

    cout << "Number numerical: " << num_numerical << endl;
    return 0;
}
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Задача 13)
#include <iostream>
using namespace std;


int main()
{
    int num, reversed_num = 0, remainder, sum, num_copy;

    cout << "Enter an number: ";
    cin >> num;
    num_copy = num;

    while(num != 0) {
        remainder = num % 10;
        reversed_num = reversed_num * 10 + remainder;
        num /= 10;
    }

    cout << "Reversed Number = " << reversed_num << endl << endl;

    sum = (num_copy + reversed_num);
    cout << "The sum of the 2 numbers is: " << sum;
    return 0;
}