How to input size of the list for this code?

Question

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

typedef struct node {
int data;
struct node *next;
} node;

node *newNode(int data) {
node *new_node = (node *) malloc(sizeof(node));
new_node->data = data;
new_node->next = NULL;
return new_node;
}

node *insert_node(node *root, int data) {
if (root == NULL)
return newNode(data);
else {
node *cur;
cur = insert_node(root->next, data);
root->next = cur;

}
return root;
}

void print(node *np) {
if (np) {
printf("(%d)", np->data);
print(np->next);
}
}

int main() {
int T = 5;
node *root = NULL;
while (T-- > 0) {
int r = rand() % 100;
root = insert_node(root, r);
}
print(root);
printf("\n");
return 0;
}

Answer 1

In main(), instead of

int T = 5;

You can input T from the console by using scanf():

int T;
scanf("%d", &T);