我希望以下代碼能夠正常工作。它編譯(gcc),但執行給出Segmentation fault: 11
。怎麼來的?由於字符串數組中的C分段錯誤
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_INDEX_LENGTH 20
main()
{
char **indici;
int n = 4;
indici = (char **)malloc(n * sizeof(char*));
int i;
for (i = 0; i < n; i++)
{
indici[i] = (char *)malloc(MAX_INDEX_LENGTH * sizeof(char*));
}
strncpy(indici[0], "aaa", MAX_INDEX_LENGTH);
strncpy(indici[0], "bbbb", MAX_INDEX_LENGTH);
strncpy(indici[0], "ccccc", MAX_INDEX_LENGTH);
strncpy(indici[0], "ddddddd", MAX_INDEX_LENGTH);
for (i = 0; i < n; i++)
{
printf("Index %d is %s\n", n, indici[n]);
}
}
有用的答案尚未發佈,但我想指出你正在分配'MAX_INDEX_LENGTH * sizeof(char *)'而不是'MAX_INDEX_LENGTH * sizeof(char)',這是你真正想要的。 – 2012-01-28 13:22:31