to much value element in linked list C/C++

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I want put value in linked list. But I have a problem, becouse I want get this: 123 but I get this 123 123 123 . . to infinity. What I doing wrong ?

#include<stdio.h>
#include<stdlib.h>
struct lista{
    int data;
    struct lista *next;
    struct lista *prev;
};

struct lista *push(struct lista *head, struct lista *x){
    x->next = head;
    x->prev = NULL;
    if(head!=NULL)
        head->prev=x;
    return x;
}

void show(struct lista *head){
    while(head!=NULL){
        printf("%d\n", head->data);
        }
    head = head->next;
}

int main(){
    struct lista *head = NULL, *x = NULL;
    x = (struct lista*)malloc(sizeof(struct lista));
    x->data = 123;
    head = push(head, x);
    show(head);

    return 0;
}

asked 15 secs ago

Paweł Stasiński

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to much value element in linked list C/C++