大约有 9,172 项符合查询结果（耗时：0.0244秒） [XML]
编译错误 error: ‘typeof’ cannot be used as a function - C/C++ - 清泛网 - 专注C/C++及内核技术
... cannot be used as a function。解决方法：修改C编译选项 -std=gnu99，使用GNU99 编译一些开源的C项目，发现typeof关键字不能被识别，报错： error: ‘typeof’ cannot be used as a function。
解决方法：修改C编译选项 -std=gnu99，使用GNU99编译...
Trying to SSH into an Amazon Ec2 instance - permission error
...mod 400 mykey.pem
Make sure to log in using ec2-user, and the correct ec2-99... address. The ec2-99 address is at the bottom of the aws console when you're logged in and seeing your instance listed
ssh -i mykey.pem ec2-user@ec2-99-99-99-99.compute-1.amazonaws.com
...
Python: changing value in a tuple
...er!
In [3]: d = tuple(range(10))
In [4]: %timeit replace_at_index1(d, 5, 99)
1000000 loops, best of 3: 872 ns per loop
In [5]: %timeit replace_at_index2(d, 5, 99)
1000000 loops, best of 3: 642 ns per loop
Yet if we look at longer tuples, list conversion is the way to go:
In [6]: k = tuple(rang...
Realistic usage of the C99 'restrict' keyword?
...1
set R2 → *b
Does GCC really do it?
GCC 4.8 Linux x86-64:
gcc -g -std=c99 -O0 -c main.c
objdump -S main.o
With -O0, they are the same.
With -O3:
void f(int *a, int *b, int *x) {
*a += *x;
0: 8b 02 mov (%rdx),%eax
2: 01 07 add %eax,(%rdi)
...
Why does auto a=1; compile in C?
...
No, this isn't legal C since 1999. No decent modern C compiler allows for this.
– Jens Gustedt
May 1 '14 at 11:40
18
...
How to sort an array of integers correctly
...meric sorts (sortNumber, shown below) -
var numArray = [140000, 104, 99];
numArray.sort(function(a, b) {
return a - b;
});
console.log(numArray);
In ES6, you can simplify this with arrow functions:
numArray.sort((a, b) => a - b); // For ascending sort
numArray.sort((a, b) =&...
Erlang's 99.9999999% (nine nines) reliability
... used in production systems for over 20 years with an uptime percentage of 99.9999999%.
4 Answers
...
Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
...
SergA
76999 silver badges1818 bronze badges
answered Nov 3 '09 at 18:26
dalledalle
16k...
Swift - How to convert String to Double
...")
formatter.numberStyle = .decimal
let number = formatter.number(from: "9,999.99")
Currency formats
let usLocale = Locale(identifier: "en_US")
let frenchLocale = Locale(identifier: "fr_FR")
let germanLocale = Locale(identifier: "de_DE")
let englishUKLocale = Locale(identifier: "en_GB") // United...
How should I print types like off_t and size_t?
...than z and discourages use of it. Nevertheless, it's standardized (by the C99 standard). For those intmax_t and int8_t of stdint.h and so on, there are macros you can use, like another answer said:
printf("value: %" PRId32, some_int32_t);
printf("value: %" PRIu16, some_uint16_t);
They are listed ...