如果你在使用C语言:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define WORD_LEN 15
int resizeArray(char (**wordList)[WORD_LEN], size_t *currentSize, size_t extent)
{
int result = 1;
char (*tmp)[WORD_LEN] = realloc(*wordList,
(*currentSize + extent) * sizeof **wordList);
if (tmp)
{
*currentSize += extent;
*wordList = tmp;
}
else
result = 0;
return result;
}
int main(void)
{
char *data[] = {"This", "is", "a", "test",
"of", "the", "Emergency",
"Broadcast", "System", NULL};
size_t i = 0, j;
char (*words)[WORD_LEN] = NULL;
size_t currentSize = 0;
for (i = 0; data[i] != NULL; i++)
{
if (currentSize <= i)
{
if (!resizeArray(&words, ¤tSize, 5))
{
fprintf(stderr, "Could not resize words\n");
break;
}
}
strcpy(words[i], data[i]);
}
printf("current array size: %lu\n", (unsigned long) currentSize);
printf("copied %lu words\n", (unsigned long) i);
for (j = 0; j < i; j++)
{
printf("wordlist[%lu] = \"%s\"\n", (unsigned long) j, words[j]);
}
free(words);
return 0;
}
num_words
变量从哪里来? - atw