zadania wskaźniki

#include <iostream>
#include <cmath>

using namespace std;

void cw_1();
void cw_2();
void cw_3();
void cw_4();
void cw_5();

void cw_6(int *sum, int *a, int *b);
int cw_6(int *a, int *b);

void cw_7(float *area, float r);
float cw_7(float *r);

string cw_8(int *a, int *b);
int cw_9(int *a);

int cw_10(int *tab, int *size);

int main()
{
    cw_1();
    cout<<"..."<<endl;
    cw_2();
    cout<<"..."<<endl;
    cw_3();
    cout<<"..."<<endl;
    cw_4();
    cout<<"..."<<endl;
    cw_5();
    cout<<"..."<<endl;
    int sum = 0, a = 6, b=15;
    cw_6(&sum, &a, &b);
    cout<<sum<<endl;
    cout<<cw_6(&a, &b)<<endl;
    cout<<"..."<<endl;
    float area = 0, r = 8;
    cw_7(&area, r);
    cout<<area<<endl;
    cout<<cw_7(&r)<<endl;
    cout<<"..."<<endl;
    int a_8=45, b_8=44;
    cout<<cw_8(&a_8, &b_8)<<endl;
    cout<<"..."<<endl;
    int a_9 = 6;
    cout<<"Silnia z "<<a_9<<" wynosi : "<<cw_9(&a_9)<<endl;
    cout<<"..."<<endl;
    int tab[] = {8, 6, 2, 6}, size = 4;
    cout<<"Suma wartosci elementow z tablicy wynosi: "<<cw_10(tab, &size)<<endl;

    return 0;
}

void cw_1(){
    int a = 15;
    cout<<a<<endl;
    cout<<(intptr_t)&a<<endl;
}

void cw_2(){
    int *a, b=20;
    cout<<(intptr_t)&b<<endl;
    cout<<b<<endl;
    a = &b;
    cout<<(intptr_t)&a<<endl;
    cout<<(intptr_t)a<<endl;
    cout<<*a<<endl;
}

void cw_3(){
    int a=14, *w_a = &a;
    float b=6.7, *w_b = &b;
    char c='x', *w_c = &c;

    cout<<"a = "<<a<<endl;
    cout<<"b = "<<b<<endl;
    cout<<"c = "<<c<<endl;

    cout<<"Adres a = "<<(intptr_t)&a<<endl;
    cout<<"Adres b = "<<(intptr_t)&b<<endl;
    cout<<"Adres c = "<<(intptr_t)&c<<endl;

    cout<<"Wartosc sadresu a = "<<*w_a<<endl;
    cout<<"Wartosc sadresu b = "<<*w_b<<endl;
    cout<<"Wartosc sadresu c = "<<*w_c<<endl;
}

void cw_4(){
    int a=6, b=8;
    int *w_a = &a, *w_b = &b;
    cout<<*w_a + *w_b<<endl;
}

void cw_5(){
    int a=6, b=9;
    int *w_a = &a, *w_b = &b;
    cout<<*w_a * *w_b<<endl;
}

void cw_6(int *sum, int *a, int *b){
    *sum = *a + *b;
}

int cw_6(int *a, int *b){
    return *a + *b;
}

void cw_7(float *area, float r){
    *area = M_PI * r * r;
}

float cw_7(float *r){
    return M_PI * *r * *r;
}

string cw_8(int *a, int *b){
    string result;
    if(*a > *b){
        result = "Liczba " + to_string(*a) + " jest wieksza od " + to_string(*b);
    } else if(*b > *a){
        result = "Liczba " + to_string(*b) + " jest wieksza od " + to_string(*a);
    }else{
        result = "Liczby sa sobie rowne";
    }
    return result;
}

int cw_9(int *a){
    if(*a == 0) return 1;
    else{
        //*a -= 1;
        (*a)--;
        return (*a+1) * cw_9(a);
    }
}

int cw_10(int *tab, int *size){
    int sum = 0;
    int iterator = 0;
    for(int *i=&iterator; *i<*size; (*i)++){
        sum += *(tab+*i);
    }
    return sum;
}