How can i sort the Last Names?? i used the Last Name to be the head so the properties or some info will follow...need help bum bump
#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;
typedef struct Student
{
char Fname[50];
char Lname[50];
char age[50];
char ID[20];
struct Student *next;
}SI;
SI *head=NULL;
char YN;
void initList(SI **pos);
SI * createNode(char *Fname, char *Lname, char *age, char *ID);
void traverseList(SI *head);
void insertNode(SI **head, SI *node);
void YorN();
void input();
int main(){
initList(&head);
input();
//traverseList(head);
}
void input(){
char Fname[50],Lname[50],age[50],ID[50];
cout << "First Name:\t";
gets(Fname);
cout << "Last Name:\t";
gets(Lname);
cout << "Age:\t";
gets(age);
cout << "ID:\t";
gets(ID);
insertNode(&head,createNode(Fname,Lname,age,ID));
system("cls");
YorN();
}
void YorN(){
printf("Press ['Y' or 'y'] to continue or ['N' or 'n'] to not continue\n\n");
scanf("%c",&YN);
fflush(stdin);
if(YN == 'Y' || YN == 'y'){
system("CLS");
input();
}
else if(YN == 'N' || YN == 'n'){
system("CLS");
traverseList(head);
}
else{
YorN();
}
}
void insertNode(SI **head, SI *node){
SI *pos = NULL;
if(*head == NULL){
*head = node;
}else{
for(pos = *head; pos != NULL; pos = pos->next){
if(pos->next == NULL){
pos->next = node;
break;
}
}
}
}
void initList(SI **pos){
*pos = NULL;
}
SI * createNode(char *Fname, char *Lname, char *age, char *ID){
SI *temp = NULL;
temp = (SI *) malloc (sizeof(SI));
strcpy(temp->Lname,Lname);
strcpy(temp->Fname,Fname);
strcpy(temp->age,age);
strcpy(temp->ID,ID);
temp->next = NULL;
return temp;
}
void traverseList(SI *head){
SI *pos;
cout<< "Student Information:\n\n";
for(pos = head; pos !=NULL; pos = pos->next)
{
cout<<"\n\n.Last Name:\t" << pos->Lname;
cout<<"\nFirstName:\t" << pos->Fname;
cout<<"\nAge:\t" << pos->age;
cout<<"\nID:\t" << pos->ID;
ofstream myFile("test.txt");
if(myFile.is_open())
{
SI *pos;
for(pos = head; pos !=NULL; pos = pos->next)
{
myFile<<"Last Name:" <<pos->Lname<<endl;
myFile<<"First Name:"<<pos->Fname<<endl;
myFile<<"Age:"<<pos->age<<endl;
myFile<<"ID:"<<pos->ID<<endl<<endl;
}
myFile.close();
}
else
{
cout<<"Unable to open file.";
}
}
system("pause");
}