C Program Output

Question

How is the"do" function working here? What will be the output?

Answer 1

a is printed infinite times because all the time loop check the address part of first node

which is always true

Comments

And what does the do-while loop do?

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i m also taking about do while loop

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infinite a's is not in option.

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what r the option ??

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This is the error if I compile the program!!

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#include <stdio.h>
struct node
{
    char data;
    struct node *link;
};
struct node *head=NULL;
struct node *tail=NULL;
void do(struct node *p)
{
    if(p)
    {
        printf("%c",p->data);
        {
            do
            {
                printf("%c",p->data);
            }
            while(p->link);
        }
    }
}
void createList(char val)
{
    struct node *newNode;
    newNode = (struct node*)malloc(sizeof(struct node));
    newNode->data = val;
    if(head == NULL)
    {
        head = newNode;
    }
    else
    {
        tail->link = newNode;
    }
    tail = newNode;
    tail->link = NULL;
}
int main(void)
{
    int i=0;
    char ch;
    for(i=0;i<4;i++)
    {
        scanf("%c",&ch);
        createList(ch);
    }
    do(head);
    return 0;
}

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Options

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answer is wrong