I have made a singly linked list that holds an integer & a string. The creation of the list works fine but deletion of a node is giving an error. Previously I was not adding a string to my list(only adding int)& at that time the code was working. please tell me what is wrong
#include <iostream>
#include <windows.h>
#include <string.h>
#include <stdlib.h>
struct fifo
{
int result;
char *abc;
struct fifo *next;
}*node,*t;
void add(struct fifo **n,int data,char *text)
{
struct fifo *temp,*node1;
if (*n==NULL)
{
temp=(struct fifo *)malloc(sizeof(struct fifo));
temp->result=data;
temp->abc=(char *)malloc(strlen(text)+1);
strcpy(temp->abc,text);
temp->next=NULL;
*n=temp;
t=temp;
printf("t=%d\n%s\n",t->result,t->abc);
}
else
{
temp=*n;
while(temp->next!=NULL)
temp=temp->next;
node1=(struct fifo *)malloc(sizeof(struct fifo));
node1->result=data;
node1->abc=(char *)malloc(strlen(text)+1);
strcpy(node1->abc,text);
node1->next=NULL;
temp->next=node1;
}
}
void del(struct fifo **n)
{
struct fifo *temp;
if (*n==NULL)
{
printf("Linked list is empty\n");
}
else
{
temp=*n;
*n=temp->next;
free(temp);
t=t->next;
}
}
int main()
{
struct fifo *temp;
//node=NULL;
int num;
char choice;
char text[20];
while(1)
{
start: printf("Enter your choice:\n1.Add node\n2.Delete Node\n3.Display\n4.Exit\n");
scanf("%c",&choice);
switch(choice)
{
case '1':
printf("Enter number\n");
scanf("%d",&num);
printf("Enter text\n");
scanf("%s",text);
add(&node,num,text);
break;
case '2':
del(&t);
break;
case '3':
if (node==NULL)
{
printf("List is empty\n");
//printf("t=%d\n%s\n",t->result,t->abc);
goto start;
}
else
{
temp=node;
while(temp!=NULL)
{
printf("%d\n",temp->result);
char *loc=(char *)malloc(strlen(temp->abc));
strcpy(loc,temp->abc);
printf("%s\n",loc);
free(loc);
temp=temp->next;
}
printf("t=%d\n%s\n",t->result,t->abc);
}
break;
case '4':
printf("Exiting program...\n");
return (0);
default:
goto start;
}
}
}
