https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96538
--- Comment #1 from Prateek Khade <prateek_kd at yahoo dot co.in> ---
(In reply to Prateek Khade from comment #0)
> I am trying to add int values present in the vector and store in long int
> type variable. If I am using for loop for calculating the sum of vector
> elements program produces correct sum. However if If I perform direct
> addition(e.g sum= arr[0]+arr[1]...=arr[n]), the results obtained is
> incorrect and seems that overflow is occurring. Below is the code snippet
> for you reference:
>
> Input:942381765 627450398 954173620 583762094 236817490
>
>
> Code leading to overflow/error:
> #include<bits/stdc++.h>
> using namespace std;
>
> int main()
> {
> vector<int> arr(5);
> for(int i=0;i<5;i++)
> {
> cin>>arr[i];
> }
> sort(arr.begin(),arr.end());
> long int sum = 0,min_sum=0,max_sum=0;
> sum = arr[1]+arr[2]+arr[3]
> min_sum = arr[0]+ sum;
> max_sum = arr[4]+ sum;
> cout<<min_sum<<" "<<max_sum<<endl;
>
> return 0;
> }
>
>
> Output :-1904555549 -1187199419
>
> Code producing correct output:
>
> #include<bits/stdc++.h>
> using namespace std;
>
> int main()
> {
> vector<int> arr(5);
> for(int i=0;i<5;i++)
> {
> cin>>arr[i];
> }
> sort(arr.begin(),arr.end());
> long int sum = 0,min_sum=0,max_sum=0;
> for(int j=1;j<4;j++)
> {
> sum = sum+ arr[j];//after for loop sum = arr[1]+arr[2]+arr[3]
> }
> min_sum = arr[0]+ sum;
> max_sum = arr[4]+ sum;
> cout<<min_sum<<" "<<max_sum<<endl;
>
> return 0;
> }
>
>
>
> Output(for same input as above):
> 3581402857 4298758987
