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逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...能是C语言的内部函数，于是查到其定义为：int sscanf(const char *str, const char *format,…)，给出一个使用实例：sscanf(“s 1”, “%s %d”, str, &a)，函数返回2（因为接收了2个参数），str为char*类型，保存”s”；a为int类型，保存1。由此，...
What is the best way to tell if a character is a letter or number in Java without using regexes?
What is the best and/or easiest way to recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks.
...
Is there an equivalent for var_dump (PHP) in Javascript?
...ts, add three to it and
// use it to indent the out block by that many characters. This argument is
// not intended to be used by any other than the recursive call.
var indent_by = typeof arguments[3] === 'undefined' ? 0:arguments[3]+3;
var do_boolean = function (v)
{
r...
C read file line by line
...stdio.h>
#include <stdlib.h>
int main(void)
{
FILE * fp;
char * line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/etc/motd", "r");
if (fp == NULL)
exit(EXIT_FAILURE);
while ((read = getline(&line, &len, fp)) != -1) {
printf("Retri...
Forward declaring an enum in C++
...on unit can't know what storage size will have been chosen - it could be a char or an int, or something else.
From Section 7.2.5 of the ISO C++ Standard:
The underlying type of an enumeration is an integral type that can represent all the enumerator values defined in the enumeration. It is im...
Listen for key press in .NET console app
...tic void ProcessFiles()
{
var files = Enumerable.Range(1, 100).Select(n => "File" + n + ".txt");
var taskBusy = new Task(BusyIndicator);
taskBusy.Start();
foreach (var file in files)
{
Thread.Sleep(1000);
Console.WriteLine("Pro...
What is the default initialization of an array in Java?
...t is a 0.
For float/double that is a 0.0
For booleans that is a false.
For char that is the null character '\u0000' (whose decimal equivalent is 0).
When you create an array of something, all entries are also zeroed. So your array contains five zeros right after it is created by new.
Note (based...
Capturing “Delete” Keypress with jQuery
... keydown event because the keypress event is intended for real (printable) characters. keydown is handled at a lower level so it will capture all nonprinting keys like delete and enter.
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impr...
UnicodeDecodeError, invalid continuation byte
...anks (and to the other that replied), I was under the mistaken belief that chars up until 255 would directly convert.
– RuiDC
Apr 5 '11 at 15:28
...
c++提取复数的实部和虚部 - C/C++ - 清泛网 - 专注C/C++及内核技术
...// 实部
REAL i; // 虚部
};
bool Parse(COMPLEX * cp, const char * strCplx, const int len)
{
memset(cp, 0, sizeof(COMPLEX));
char buf[MAX_BUF_LEN];
int signPos = -1, // +/-号位置
iPos = -1; // 结尾的i的位置
for (int i = len-1; i >-1;...