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How do I analyze a program's core dump file with GDB when it has command-line parameters?
... *(int*)(NULL) = i; /* line 7 */
return i - 1;
}
int main(int argc, char **argv) {
/* Setup some memory. */
char data_ptr[] = "string in data segment";
char *mmap_ptr;
char *text_ptr = "string in text segment";
(void)argv;
mmap_ptr = (char *)malloc(sizeof(data_ptr) + 1...
What does the comma operator , do?
...ariables used in a for loop, and it gives the following example:
void rev(char *s, size_t len)
{
char *first;
for ( first = s, s += len - 1; s >= first; --s)
/*^^^^^^^^^^^^^^^^^^^^^^^*/
putchar(*s);
}
Otherwise there are not many great uses of the comma operator, although it i...
Default template arguments for function templates
...late <typename T> T prettify(T t) { return t; }
std::string prettify(char c) {
std::stringstream ss;
if (isprint((unsigned char)c)) {
ss << "'" << c << "'";
} else {
ss << (int)c;
}
return ss.str();
}
template <typename S, typena...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
... <stdio.h>
int main()
{
struct stat s1;
int status = stat(<const char* denoting pathname>, &s1);
printf(“Path is a directory : %d\n”, S_ISDIR(s1.st_mode));
return 0;
}
对于 I/O 操作较多的程序，这样的不一致就意味着需要进行大量的工程工作才能...
What is the default value for enum variable?
...
Thanks, and what about enums defined with char instead of int. e.g. enum Status { Active = 'A', Inactive='I'}
– Fernando Torres
Apr 24 '15 at 16:17
...
How long should SQL email fields be? [duplicate]
...l address can basically be indefinitely long so any size I impose on my varchar email address field is going to be arbitrary. However, I was wondering what the "standard" is? How long do you guys make it? (same question for Name field...)
...
Read/write files within a Linux kernel module
...ad.h>
Opening a file (similar to open):
struct file *file_open(const char *path, int flags, int rights)
{
struct file *filp = NULL;
mm_segment_t oldfs;
int err = 0;
oldfs = get_fs();
set_fs(get_ds());
filp = filp_open(path, flags, rights);
set_fs(oldfs);
if (I...
What happens if you static_cast invalid value to enum class?
... implementers to apply to to their C++11 and C++14 compilation modes.
(*) char is required to be at least 8 bit wide, but isn't required to be unsigned. The maximum value storable is required to be at least 127 per Annex E of the C99 Standard.
Compare to [expr]/4
If during the evaluation of ...
How to remove first 10 characters from a string?
How to ignore the first 10 characters of a string?
12 Answers
12
...
Does making a struct volatile make all its members volatile?
...by the pointer as const or volatile, use a declaration of the form:
const char *cpch;
volatile char *vpch;
To declare the value of the pointer — that is, the actual address stored in the pointer — as const or volatile, use a declaration of the form:
char * const pchc;
char * volatile pchv;
...