[Solved] why doesn’t my sorted code work in c? [closed]

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

struct node {
    int data;
    struct node *nextPtr;
};

struct node *firstPtr = NULL;

void insertioon (int d){
    struct node *np, *temp, *prev = NULL;
    int found;

    np=malloc(sizeof(struct node));
    np->data = d;
    np->nextPtr = NULL;

    temp=firstPtr;
    found=0;
    while ((temp != NULL) && !found)
    {

        if (temp->data <d)
        {
            prev = temp;
            temp = temp->nextPtr;
        }
        else
        {
            found=1;
        }
    }
    if (prev == NULL)
    {
        np->nextPtr=firstPtr;
        firstPtr=np;
    }
    else
    {
        prev->nextPtr = np;
        np->nextPtr = temp;
    }
}

void print_list(struct node *np){
    while(np){
        printf("%d ", np->data);
        np=np->nextPtr;
    }
}

int main(){
    insertioon(10);
    insertioon(5);
    insertioon(7);
    insertioon(1);
    insertioon(16);
    print_list(firstPtr);//1 5 7 10 16
    printf("\n");
    return 0;
}

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solved why doesn’t my sorted code work in c? [closed]