Losowość - zadania

Zadanie 1.

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

int main ()
{
    srand(time(NULL));
    for (int i=0; i<3; i++)
    {
        cout<<rand()%(9+1)<<endl;
    }
}


Zadanie 2.

#include<iostream>
#include<cstdlib>
#include<ctime>
using namespace std;

int main()
{
    int a=10;
    int b=20;
    int c;
    int d=0;
    srand(time(NULL));
    for (int x; x=10; x>0; x--)
    {
        c=a+rand()%(b-a+1);
        d=d+c;
    }
    return 0;
}


Zadanie 3.

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

int main ()
{
    int a=10;
    int b=20;
    int c;
    int d=0;
    srand(time(NULL));
    for(int x=100; x>0; x--)
    {
        c=a+rand()%(b-a+1);
        d=d+c;
    }
        cout<<"suma wynosi"<<d<<endl;

    return 0;
}


Zadanie 4.

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

int main()
{
    int a=1;
    int b=2;
    int x;
    srand(time(NULL));
    x=a+rand()%(b-a+1);

    if (x==2)
    {
        cout<<"reszka"<<endl;
        }
    else
    {
          cout<<"orzel"<<endl;
    }
      return 0;
}


Zadanie 5.

#include <iostream>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
{
    int a=-1000;
    int b=1000;
    int c=0;

    srand(time(NULL));
    do
    {
        c=a+rand()%(b-a+1);
        cout<<c<<endl;
    }
    while(!(c>100&&c<200));

    return 0;
}