如何在C中选择字符串数组？

Question

我想在C中定义不同的字符串数组,然后可以根据其他一些值进行选择,例如如下所示:

char foo[][10] = {"Snakes", "on", "a", "Plane"};
char bar[][10] = {"Fishes", "in", "a", "Lake"};
char *choice;
if (flag == 1) {
  choice = &foo;
} else if (flag == 2) {
  choice = &bar;
} 
printf("%s%s\n", choice[0] , choice[1]); 

案例中的预期结果flag是1:

Snakeson

预期结果flag为2:

Fishesin

但上面的代码给出了一个segmentation fault错误,而我尝试了不同的定义char,即char*和char**.怎么做对了？有没有关于这个问题的好教程,即关于指针,数组,foo上面的例子究竟是什么......

Answer 1

如果你只使用指针数组会更容易:

int main(void)
{
  const char *foo[] = { "Snakes", "on", "a", "Plane" };
  const char *bar[] = { "Fishes", "in", "a", "Lake" };
  const int flag = 17;
  const char **choice = (flag == 1) ? foo : bar;

  printf("%s %s\n", choice[0], choice[1]);

  return 0;
}

以上打印

Fishes in