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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，...
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...
Callback functions in C++
... for jumping, the engine can call
game_core_instance.update_keybind(newly_selected_key, &player_jump);
and thus change the behaviour of a call to key_pressed (which the calls player_jump) once this button is pressed the next time ingame.
What are callables in C++(11)?
See C++ concepts: Call...
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
...
How can I efficiently select a Standard Library container in C++11?
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How do I detect unsigned integer multiply overflow?
... addcarry_u8 or subborrow_u64). Their signature is a bit obtuse:
unsigned char _addcarry_u32(unsigned char c_in, unsigned int src1, unsigned int src2, unsigned int *sum);
unsigned char _subborrow_u32(unsigned char b_in, unsigned int src1, unsigned int src2, unsigned int *diff);
c_in/b_in is the c...
Should I use encodeURI or encodeURIComponent for encoding URLs?
....
encodeURI assumes that the input is a complete URI that might have some characters which need encoding in it.
encodeURIComponent will encode everything with special meaning, so you use it for components of URIs such as
var world = "A string with symbols & characters that have special meanin...
In-Place Radix Sort
...though.
Btw: If you're dealing with DNA strings only: You can compress a char into two bits and pack your data quite a lot. This will cut down the memory requirement by factor four over a naiive representation. Addressing becomes more complex, but the ALU of your CPU has lots of time to spend duri...
What is a reasonable length limit on person “Name” fields?
...put their information, including name. I gave the name field a limit of 50 characters to coincide with my database table where the field is varchar(50), but then I started to wonder.
...
Why do you not use C for your web apps?
...;
StringBuffer sb = new StringBuffer(len);
boolean lastWasBlankChar = false;
int c;
for(int i=0; i<len; i++) {
c = Name.charAt(i);
if(c == ' ') sb.append("&#32;"); else
if(c == '"') sb.append("&quot;"); else
if(c == '&...