I dont know why there were a lot of code lines at first. My answer is simple like this and it works: C/C++

include

using namespace std; int main (){ int sum; int n; cin>>n; int ar[n]; for (int i=0;i>ar[i];

}
for (int j=0;j<n;j++){
    sum=sum+ar[j];
}
cout<<sum;
return 0;

}