[Bug c++/42023] New: Different exists with and without standard output.

[chenclf at gmail dot com]

Here is my code compiled with "g++ -Wall shell_sort.cpp"
The problem is that the result is different without the standard output in the
shell "shell_sort" function.
Would you please explain why this happens in my program?

#include <iostream>
using namespace std;

void shell_sort(int *x, int m)
{
        int h;
        while (h > 0){
                for (int i = 0; i < m; i++){
                        int temp = x[i], j = i;
                        while ((j >= h) && (x[j-h] > temp)){
                                x[j] = x[j - h];
                                j -= h;
                        }
                        x[j] = temp;
                }
//              cout << endl;
                if ((h / 2) != 0){
                        h /= 2;
                }else if (h == 1){
                        h = 0;
                }else{
                        h = 1;
                }
        }
}
int main()
{
        int *x = new int[10];
        for (int i = 0; i < 10; i++){
                x[i] = 30 - 3*i;
        }
        std::cout << "Original:" << std::endl;
        for (int i = 0; i < 10; i++){
                std::cout << x[i] << "\t";
        }
        std::cout << std::endl;
        cout << "Output:" <<endl;
        shell_sort(x, 10);
        std::cout << "Result:" <<std::endl;
        for (int i = 0; i < 10; i++){
                std::cout << x[i] << "\t";
        }
        std::cout << std::endl;
        return 0;
}


-- 
           Summary: Different exists with and without standard output.
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: chenclf at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42023