找不到分段错误在哪里
我已经编程了一段时间了,没有那么多,但是对我来说找到分段错误在哪里真的很难,已经尝试了几乎所有的东西:(。这是一个学校项目,老师通常不会提供帮助 好吧,这
就是代码:
#include "funcoes2.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
listaa total_aero = NULL;
void guarda_voo()
{
listaa t; /* struct list of airports */
voo novo_voo;
aeroporto novo_aeroporto1;
aeroporto novo_aeroporto2;
scanf("%s %s %s %d:%d %s %f\n", novo_voo.codigo, novo_voo.aero_partida, novo_voo.aero_chegada, &novo_voo.hora_partida, &novo_voo.minuto_partida, novo_voo.hora_chegada, &novo_voo.preco);
for(t=total_aero; t != NULL; t = t->prox){
if(!strcmp(t->naero.codigo, novo_voo.aero_partida))
break;
}
if(t == NULL){
insere_aeroporto(total_aero, novo_aeroporto1); /* adds an airport to the list, I also think that it won't reach here when executing */
strcpy(total_aero->naero.codigo, novo_voo.aero_partida);
total_aero->naero.voos_saem++;
strcpy(total_aero->naero.aero_barato, novo_voo.aero_chegada);
strcpy(total_aero->naero.aero_tarde, novo_voo.aero_chegada);
total_aero->naero.preco_barato=novo_voo.preco;
total_aero->naero.hora_tarde=novo_voo.hora_partida;
total_aero->naero.minuto_tarde=novo_voo.minuto_partida;
total_aero->naero.situacao='a';
total_aero->naero.voos = NULL;
insere_voo((total_aero->naero).voos, novo_voo);
}
else{
t->naero.voos_saem++;
if(novo_voo.preco < (t->naero.preco_barato)){
t->naero.preco_barato=novo_voo.preco;
strcpy(t->naero.aero_barato, novo_voo.aero_chegada);
};
if((t->naero.hora_tarde<novo_voo.hora_partida) || (t->naero.hora_tarde==novo_voo.hora_partida && t->naero.minuto_tarde<novo_voo.minuto_partida)){
(t->naero.hora_tarde=novo_voo.hora_partida);
(t->naero.minuto_tarde=novo_voo.minuto_partida);
strcpy(t->naero.aero_tarde, novo_voo.aero_chegada);
}
insere_voo(t->naero.voos, novo_voo);
}
for(t=total_aero; t != NULL; t = t->prox){
if(!strcmp(t->naero.codigo, novo_voo.aero_chegada)){
t->naero.voos_chegam++;
return;
}
}
提前致谢,如果有什么不清楚,请告诉我,我会尽力解释它,
我将把 .h 文件放在这里:
typedef struct _st_voo{
char codigo[7];
char aero_partida[4];
char aero_chegada[4];
int hora_partida;
int minuto_partida;
char hora_chegada[6];
float preco;
}voo;
struct nodev {
voo nvoo;
struct nodev *prox;
};
typedef struct nodev *listav;
typedef struct _st_aeroporto{
char codigo[4];
int voos_saem;
int voos_chegam;
char aero_barato[4];
char aero_tarde[4];
float preco_barato;
int hora_tarde;
int minuto_tarde;
char situacao;
listav voos;
}aeroporto;
struct nodea {
aeroporto naero;
struct nodea *prox;
};
typedef struct nodea *listaa;
void guarda_voo();
void info_aeroporto();
void insere_voo(listav x, voo novo_voo);
void remove_voo(listav x, voo cancelado);
void insere_aeroporto(listaa x, aeroporto novo_aero);
I've been programming for some time now, not that much, but it seems really difficult for me to find where the segmentation fault is, already tried pretty much everything :(. This is for a school project and teachers don't usually help on this things.
Well, here it is, the code:
#include "funcoes2.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
listaa total_aero = NULL;
void guarda_voo()
{
listaa t; /* struct list of airports */
voo novo_voo;
aeroporto novo_aeroporto1;
aeroporto novo_aeroporto2;
scanf("%s %s %s %d:%d %s %f\n", novo_voo.codigo, novo_voo.aero_partida, novo_voo.aero_chegada, &novo_voo.hora_partida, &novo_voo.minuto_partida, novo_voo.hora_chegada, &novo_voo.preco);
for(t=total_aero; t != NULL; t = t->prox){
if(!strcmp(t->naero.codigo, novo_voo.aero_partida))
break;
}
if(t == NULL){
insere_aeroporto(total_aero, novo_aeroporto1); /* adds an airport to the list, I also think that it won't reach here when executing */
strcpy(total_aero->naero.codigo, novo_voo.aero_partida);
total_aero->naero.voos_saem++;
strcpy(total_aero->naero.aero_barato, novo_voo.aero_chegada);
strcpy(total_aero->naero.aero_tarde, novo_voo.aero_chegada);
total_aero->naero.preco_barato=novo_voo.preco;
total_aero->naero.hora_tarde=novo_voo.hora_partida;
total_aero->naero.minuto_tarde=novo_voo.minuto_partida;
total_aero->naero.situacao='a';
total_aero->naero.voos = NULL;
insere_voo((total_aero->naero).voos, novo_voo);
}
else{
t->naero.voos_saem++;
if(novo_voo.preco < (t->naero.preco_barato)){
t->naero.preco_barato=novo_voo.preco;
strcpy(t->naero.aero_barato, novo_voo.aero_chegada);
};
if((t->naero.hora_tarde<novo_voo.hora_partida) || (t->naero.hora_tarde==novo_voo.hora_partida && t->naero.minuto_tarde<novo_voo.minuto_partida)){
(t->naero.hora_tarde=novo_voo.hora_partida);
(t->naero.minuto_tarde=novo_voo.minuto_partida);
strcpy(t->naero.aero_tarde, novo_voo.aero_chegada);
}
insere_voo(t->naero.voos, novo_voo);
}
for(t=total_aero; t != NULL; t = t->prox){
if(!strcmp(t->naero.codigo, novo_voo.aero_chegada)){
t->naero.voos_chegam++;
return;
}
}
Thanks in advance, if something isn't that clear, tell me, I'll try to explain it
I'll put here the .h file:
typedef struct _st_voo{
char codigo[7];
char aero_partida[4];
char aero_chegada[4];
int hora_partida;
int minuto_partida;
char hora_chegada[6];
float preco;
}voo;
struct nodev {
voo nvoo;
struct nodev *prox;
};
typedef struct nodev *listav;
typedef struct _st_aeroporto{
char codigo[4];
int voos_saem;
int voos_chegam;
char aero_barato[4];
char aero_tarde[4];
float preco_barato;
int hora_tarde;
int minuto_tarde;
char situacao;
listav voos;
}aeroporto;
struct nodea {
aeroporto naero;
struct nodea *prox;
};
typedef struct nodea *listaa;
void guarda_voo();
void info_aeroporto();
void insere_voo(listav x, voo novo_voo);
void remove_voo(listav x, voo cancelado);
void insere_aeroporto(listaa x, aeroporto novo_aero);
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评论(4)
你的代码输入全乱了。由于我们无法查看或执行所有代码,因此不太可能有人能够找到它。您有 2 个选择:
Your code entry got all messed up. Since we can't see all the code or execute it, it's not likely someone will be able to find it. You have 2 options:
Valgrind 是你的朋友。
Valgrind is your friend.
啊,谷歌是你的朋友,但我会继续说:很明显你需要一个调试器。如果您在 Linux 或 UNIX 操作系统上运行它,那么您需要使用 gdb (http://www.gnu.org/software/gdb/),而在 Windows 领域,Visual Studio 及其同胞附带了内置的调试器如果您使用其中之一来查找分段错误,应该不会花费任何时间。
对于 GDB,调用示例可在 http://sourceware .org/gdb/current/onlinedocs/gdb/Sample-Session.html#Sample-Session,一个专门针对分段错误的链接位于此链接:http://www.unknownroad.com/rtfm/gdbtut/gdbsegfault.html。
Ah, Google is your friend here, but I'll go ahead and say it: its pretty obvious you need a debugger. If you're running this on Linux or a UNIX OS then you'll need to use gdb (http://www.gnu.org/software/gdb/) and in Windows land Visual Studio and its compatriots come with a debugger built in. It should take no time if you're using one of those to find the segmentation fault.
For GDB, invocation samples are available at http://sourceware.org/gdb/current/onlinedocs/gdb/Sample-Session.html#Sample-Session, and one specifically for segmentation faults is at this link: http://www.unknownroad.com/rtfm/gdbtut/gdbsegfault.html.
在尝试使用 strcpy 或 scanf 复制到字符串之前,请检查是否已为字符串分配了空间。
正如其他人提到的,使用调试器。如果您只是在调试器中运行直到它失败,您将能够查看回溯以查看导致失败的调用。
您可以使用 printf 语句来显示值 - “穷人”的调试器,但使用调试器您会更快地发现问题。
Check that you have allocated space for your strings before trying to copy into them with strcpy or scanf.
As others mentioned,use the debugger. If you just run within the debugger until it fails, you will be able to look at the traceback to see the calls leading to the failure.
You can use printf statements to display values - the "poor" man's debugger, but you'll find problems faster with a debugger.