#include"iostream.h"
double S,n,i;
int main()
{
    cin>>n;
    if(n==0)
        S=1;
    if(n>0)
        for(i=1;i<=n;i++)
            S=S+i;
    if(n<0)
        for(i=1;i>=n;i--)
            S=S+i;
    cout<<S<<endl;
    return 0;
}

Mihran you must set value of S equal to zero,before "for(...) S=S+i;".Good luck!

Edited by author 07.05.2009 17:39

why the compiler does not accept the job site?
that do not correctly?


#include <iostream>
#include <math.h>
using namespace std;
int main()
{
int N;
int H=0;
int S=0;
int i;

    cin>>N;
    if(((N<10000)&&(N>1))||((N>-10000)&&(N<-1)))
    {
    H=abs(N);
    for( i=2;i<=H;i++) S=S+i;
    if(N<0) cout<<endl<<S*(-1);
    else cout<<endl<<S;}
    else cout<<"error";
return 0;
}

n=0