Thread: After while the method it's not returning anything

Hello,guys

I'm new on this forum...sorry for any misstake.

I have a linked list where i add cars that have name and speed.

After that, i want to get the number of cars from the linked list, so i have a method that goes throw every element with a while, adds 1 to a integer(count++) and than returns the integer.

The problem is that the integer it's not returned and i don't know why.
This is the method:

Code:

int GetNumberOfElements(RacingCar *start){
    RacingCar *currentCar = start;
    int count = 0;
    while(currentCar != NULL){
        currentCar = currentCar->next;
        count++;
    }
    return count;
}

In main:

Code:

int test = GetNumberOfElements(start);
            printf("%d",test);

Well...nothing it's printed after this.

I mean that the method it's not returning an integer.
It goes on method and while(i used a printf statement)

This is the code

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct S_RacingCar{
    char name[8];
    int speed;
    struct S_RacingCar *next;
    struct S_RacingCar *prev;
} RacingCar;

//The method with problems
int GetNumberOfElements(RacingCar *start){
    RacingCar *currentCar = start;
    int count = 0;
    while(currentCar != NULL){
        count++;
        currentCar = currentCar->next;
    }
    return count;
}

//Adding the car
RacingCar *AddCar(RacingCar *previous){
    printf("Enter name and speed: ");
    char input[16];
    fgets(input,15,stdin);

    RacingCar *newCar = malloc(sizeof(RacingCar));
    sscanf(input,"%s %d",newCar->name, &newCar->speed);
    printf("Added: %s Speed: %d\n\n",newCar->name,newCar->speed);
    newCar->next = NULL;
    newCar->prev = NULL;
    if(previous != NULL){
        previous->next = newCar;
        newCar->prev = previous;
    }
    return newCar;
}

int main()
{
    char command[16];
    char input[16];
    char name[16];
    RacingCar *start = NULL;
    RacingCar *newest = NULL;

    while(fgets(input,15,stdin)){
        sscanf(input,"%s",command);

        if(strncmp(command,"quit",4) == 0){
            printf("\n\nBreaking...\n\n");
            break;
        }else if(strncmp(command,"print",5) == 0){
            PrintList(start);
        }else if(strncmp(command,"add",3) == 0){
            if(start == NULL){
                start = AddCar(NULL);
                newest = start;
            }else{
                newest = AddCar(newest);
            }
//where i call the problem method
        }else if(strncmp(command,"test",4) == 0){
            int test = GetNumberOfElements(start);
            printf("%d",test);
        }
    }
    return 0;
}

Ok,that's strange...Let me check my code one more time -.-