How to traverse linked list in c++?

How to Write a function to store the data of your linked list in a file?

• This is my linked list..Please somebody help me to make a file of this program.. #include <stdlib.h> #include <stdio.h> #include <string.h> int serial=1; //initializing a global variable void insert_newstudent (); //Function to add new node to linked list void print_database(); //Function to print all nodes of the linked list struct student{ //Node of the linked list char name[100]; int age; float gpa; int serial_number; student *next_ptr; }; //Global pointers to traverse the linked list struct student *first_element,*current_element,*new_ele… int main() { char ch; first_element = NULL; while (1) { printf("\nEnter 'e' to enter new agent\n"); printf("\n 'l' to display all student data\n"); printf("\n'q' to quit the program\n"); ch = getchar(); switch(ch) { case 'e': insert_newstudent(); break; case 'l': print_database(); break; case 'q': return 0; default: puts("\nEnter only selections listed"); } } return 0; } void insert_newstudent () { //Create a new node(sturcture in memory) and point to it new_element = (struct student*) malloc(sizeof(struct student)); if(first_element==NULL) { //If list is empty first_element = current_element = new_element; //All three pointers are pointing at the first location } else { current_element = first_element; //Point to the first node while(current_element->next_ptr !=NULL) //Find the last node so that new node can be added after this { current_element = current_element->next_ptr; } current_element->next_ptr = new_element; //Now that we have found the last node, make its next_ptr point to the new element current_element = new_element; //Now point to this new node in memory so that data can be added to it } _flushall(); printf("\nEnter name: "); gets(current_element->name); printf("\nEnter age: "); scanf("%d",&current_element->age); printf("\nEnter gpa: "); scanf("%f",&current_element->gpa); current_element->serial_number=serial… serial++; current_element->next_ptr = NULL; } void print_database() { if(first_element==NULL){ //Can't print anything if list is empty printf("\nEmpty List. \n"); return; } current_element = first_element; //Start from the first element, traverse through the list and print all do { printf("\nName: %s",current_element->name); printf("\nAge: %d",current_element->age); printf("\ngpa: %f\n",current_element->gpa); printf("\nserialnumber:%d\n",current… //printimg the serial number current_element=current_element->nex… } while(current_element != NULL); }

• Answer:

  void writelist(struct student *H) { FILE *op=fopen("filename", "w"); while(H) { fwrite(H, sizeof(struct student), 1, op); H=H->next_ptr; } }