Why this code of ordered insertion of linked list is not working in GCC CEntos?

[gaurav#]

Where as the same fine on Dev-C++ (TDM-GCC 4.8.1 64-bit Release), gcc version on centos is (gcc (GCC) 4.8.2 20140120 (Red Hat 4.8.2-16)) Please tell me the reason for this:

 #include<stdio.h>#include<stdlib.h>
struct node
{
    int i;
    struct node *next;
};
void main()
{
struct node *head,*temp,*p;
int d;
char ch;
printf("Do you want to enter data? Y/N");
scanf("%c",&ch);
fflush(stdin);
if((ch=='y')||(ch=='Y'))
{
    printf("Enter your data: ");
    scanf("%d",&d);
    fflush(stdin);
    head=(struct node *)malloc(sizeof(struct node));
    head->i=d;
    head->next=NULL;
}
p=head;
printf("Do you want to enter more data? Y/N");
scanf("%c",&ch);
fflush(stdin);
while((ch=='y')||(ch=='Y'))
{
    temp=(struct node *)malloc(sizeof(struct node));
    printf("Enter your data: ");
    scanf("%d",&d);
    fflush(stdin);
      temp->i=d;
    temp->next=NULL;
    if(p->i>=temp->i)
    {
    	temp->next=head;
    	head=temp;
	}
	else
	{
        while((p->next!=NULL)&&(p->next->i<temp->i))
        {
            p=p->next;
    }
        temp->next=p->next;
        p->next=temp;
    }
    printf("Do you want to enter more data? Y/N");
scanf("%c",&ch);
fflush(stdin);
p=head;
}
while(p!=NULL)
{
    printf("%d ",p->i);
    p=p->next;
}
}

[laserlight]

How does it not work?

[gaurav#]

check out its resultant on running the program:

[laserlight]

Ah. Well, not that fflush(stdin) results in undefined behaviour: fflush is only defined for output streams and update streams for which the last operation was output. Therefore, you should replace fflush(stdin) with some other method of discarding what is in the input buffer, e.g., by reading and discarding characters until a newline or EOF is detected.

Also, note that void main is non-standard: it should be int main.

Although you have made some effort at indentation, your indentation could still be more consistent, e.g., the entire body of the main function should be indented by one level, and at some parts you indent unnecessarily.

[stahta01]

Hint: Read the docs scanf - C++ Reference

scanf("%c",&ch);

Should likely be

scanf(" %c",&ch);

The space before the %c tells scanf to skip white space.

Tim S.