char* longestCommonPrefix(char** strs, int strsSize) {
char prefix=(char )malloc(10sizeof(char ));
if (!prefix)
{
exit(0);
}
int size = 0;
int length = sizeof(prefix)/sizeof(prefix[0]);
char c;
int len = strlen(strs[0]);
for (int i = 0; i < len; i++)
{
c = strs[0][i];
int flag = 0;
for (int j = 1; j < strsSize; j ++)
{
if (c != strs[j][i])
{
flag = 1;
break;
}
}
if (0 == flag)
{
if (size > length)
{
char newString = (char)realloc(prefix,(sizeof(prefix)/sizeof(prefix[0])+100)sizeof(char ));

            if (!newString)
            {
                exit(0);
            }
            prefix = newString;
            if (newString)
            {
                free(newString);
            }
        }
        prefix[size++] = c;
        prefix[size] = '\0';
        length = sizeof(prefix)/sizeof(prefix[0])+10;
    }else
    {
        return prefix;
    }
}
return prefix;}

如上代码，这是leetcode上的题目，在本=本地没问题，提交到leetcode后报错：

不是很经常写C，对内存这块不是很了解，望指教！！