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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct queue{
 
  struct data *top,*rear;
};
 
int main()
{
 
  struct queue q;
 
  q.top = (struct queue)malloc(sizeof(struct queue));
  if(q.top == NULL){printf("メモりが確保できませんでした。\n"); return 1;        }
q.top->key = 'a';
  q.top->next = NULL;
  q.rear = q.top;
 
  q.top->next = (struct queue)malloc(sizeof(struct queue));
 if(q.top->next == NULL){printf("メモりが確保できませんでした。\n"); return 1;        }
q.top->next->key = 'b';
 q.top->next->next = NULL;
 q.rear = q.top->next;
 
q.top->next->next = (struct queue)malloc(sizeof(struct queue));
 if(q.top->next->next == NULL){printf("メモりが確保できませんでした。\n"); return 1;        }
q.top->next->next->key = 'c';
 q.top->next->ext->next = NULL;
 q.rear = q.top->next->next;
 
 
 
    printf("%c\n", q.top->key);
    printf("%c\n", q.top->next->key);
    printf("%c\n", q.rear->key);
 
    return 0;
 
}
 

prog.c: In function ‘main’:
prog.c:14: error: conversion to non-scalar type requested
prog.c:16: error: dereferencing pointer to incomplete type
prog.c:17: error: dereferencing pointer to incomplete type
prog.c:20: error: dereferencing pointer to incomplete type
prog.c:20: error: conversion to non-scalar type requested
prog.c:21: error: dereferencing pointer to incomplete type
prog.c:22: error: dereferencing pointer to incomplete type
prog.c:23: error: dereferencing pointer to incomplete type
prog.c:24: error: dereferencing pointer to incomplete type
prog.c:26: error: dereferencing pointer to incomplete type
prog.c:26: error: conversion to non-scalar type requested
prog.c:27: error: dereferencing pointer to incomplete type
prog.c:28: error: dereferencing pointer to incomplete type
prog.c:29: error: dereferencing pointer to incomplete type
prog.c:30: error: dereferencing pointer to incomplete type
prog.c:34: error: dereferencing pointer to incomplete type
prog.c:35: error: dereferencing pointer to incomplete type
prog.c:36: error: dereferencing pointer to incomplete type

Standard output is empty