常见错误

C语言不支持函数重载

C11 新做法 —— 用 _Generic 伪装成重载

 

[1] 50344 segmentation fault ./a.out

int *p; // 不会分配地址空间？p是一个指针，里面的地址值是错误的

*p = 1;
printf("p=%d", *p);

bus error

struct Book
{
  char title[50];
  char author[20];
  int book_id;
  double price;
};

struct Book *pbook;
printf("%s", pbook->author);
strcpy(pbook->author, "Bangbang"); // bus error

char *name1 = "bang";
name1[2] = 'b'; //bus error

14659 segmentation fault

链接错误

ld: symbol(s) not found for architecture x86_64

$ cc myls.c
Undefined symbols for architecture x86_64:
  "_err_quit", referenced from:
      _main in myls-e331f1.o
  "_err_sys", referenced from:
      _main in myls-e331f1.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)