Std15.11.05_4

#include <stdio.h>


long int sumaAr(int n, int r)
{
    int s=1;
    for (int i=1;i<n;i++)
        s=s+(1+(r*i));
    return s;
}


int main()
{
    int a[2];
    for (int i=0;i<2;i++)
    {
        printf("Podaj %d liczbe: ",i+1);
        scanf("%d",&a[i]);
    }
    printf("Suma %d elementow ciagu arytmetycznego to: %d",a[0],sumaAr(a[0],a[1]));

    return 0;
}