首先看如下代码： int main(int argc, char** argv) {     int a[5] = {1,2,3,4,5};     int* ptr = (int*)(&a + 1);     printf("%d,%d\n", *(a+1), *(ptr-1));     return 0; }复制代码这道题在很多所谓经典C语言面试题里是常见...

...）、和ASCII码不兼容，而且不太好移植(Not Portable) 例如：char *s=“Good ,北京”;该C语言代码采用UTF-16编码后，字节序列中间有许多’\0’，’\0’ 会被识别为字符串的终止，strlen()函数不起用了。 2）、存储空间较大，造成存储及...

sizeof strlen const char* p 4 字符串长度 std::string 4 字符串长度 "......" 字符串长度+1   ('\0') 字符串长度

...xit(1); } } // 锁定文件后，将该进程的pid写入文件 char buf[16] = {}; sprintf(buf, "%d", getpid()); ftruncate(fd, 0); ret = write(fd, buf, strlen(buf)); if (ret < 0) { printf("Write file failed, file: %s, error: %s\n", kPidFileName, strerror(errno)); close(fd); ...

...大小，在free的时候也会检测出来，报这个错误，如： char* buf = malloc(5); memcpy(buf, "123456", 6); free(buf); //free时报此错误 实际项目中可能此类问题没法直观定位到，推荐使用gcc自带的 asan 检查内存错误。 asan 内存跟踪

I've heard much about the understandable abhorrence of using .Select in Excel VBA, but am unsure of how to avoid using it. I am finding that my code would be more re-usable if I were able to use variables instead of Select functions. However, I am not sure how to refer to things (like the Activ...

...e BEFORE UPDATE on YourTable FOR EACH ROW BEGIN SET new.guid_column := (SELECT UUID()); END // Then execute UPDATE YourTable set guid_column = (SELECT UUID()); And DROP TRIGGER beforeYourTableUpdate; UPDATE Another solution that doesn't use triggers, but requires primary key or unique inde...

...of the dialogue. This should include two which are the plain Eclipse icon. Select the one with tooltip "Eclipse.org". Eclipse has many components, each of which has its own version number. The core is the Eclipse Platform sh...

Is it possible to use JavaScript to open an HTML select to show its option list? 11 Answers ...

...ked files, you can use this command: git ls-files -o --exclude-standard | select | foreach { git add $_ } share | improve this answer |