CODEWITHSUNDEEP
clinked-listconsoleoutputsingly-linked-list
Richie
Richie

Reputation: 73

Using Linked List without any error but getting a strange output

Recently I learned about linked lists and wrote a simple program from a youtube tutorial, which simply adds some racingcars in a linked list with their names and their speed. However everything is working fine just the output from the console seems strange to me.

Console: 

Car: 1 Name: mercedes� Speed: 200

Car: 2 Name: redBull Speed: 250

Car: 3 Name: ferrari Speed: 300

Car: 4 Name: mcLaren Speed: 10

Total Cars: 4

As you can see I'm wondering about the strange �.

Code:

#include "stdio.h"
#include "string.h"

typedef struct S_racingCar
{
    char name[8];
    int speed;
    struct S_racingCar *next;
} racingCar;

void printList(racingCar *start)
{
    racingCar *currentCar = start;
    int count = 0;

    while(currentCar != NULL)
    {
        count++;
        printf("Car: %d Name: %s Speed: %d\n", count, currentCar->name, currentCar->speed);
        currentCar = currentCar->next;
    }
    printf("Total Cars: %d\n", count);

}

int main() 
{
    racingCar mercedes = { "mercedes", 200, NULL};
    racingCar redBull = { "redBull", 250, NULL};
    racingCar ferrari = { "ferrari", 300, NULL};
    racingCar mcLaren = { "mcLaren", 10, NULL};

    mercedes.next = &redBull;
    redBull.next = &ferrari;
    ferrari.next = &mcLaren;

    printList(&mercedes);


    return 0;
}

Upvotes: 0

Views: 28

Answers (2)

Dronz
Dronz

Reputation: 2097

It's because you have name defined as char[8], and "mercedes" has 8 characters, but printf expects an end of line character at the end, so you need it to be 9 chars to use it like that without a side-effect from printf.

Upvotes: 0

H.S.
H.S.

Reputation: 12669

The length of name structure member is 8 and "mercedes" is also of length 8. There is no space left for null character \0. Try increasing the size of name.
In C language, a string is a null-terminated array of characters. The buffer should be long enough to accommodate the terminating null-character \0.

Upvotes: 1

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