Example

int main(int argc, char* argv[])
{
double x;
scanf("%d %d", &x, &x);
printf("%d %d", &x, &x);
return 0;
}

Solution
Make a copy of the argument.

int main(int argc, char* argv[])
{
double x;
double y = x;
scanf("%d %d", &x, &y);
printf("%d %d", &x, &y);
return 0;
}