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Practical usage of setjmp and longjmp in C
... bufferB;
void routineB(); // forward declaration
void routineA()
{
int r ;
printf("(A1)\n");
r = setjmp(bufferA);
if (r == 0) routineB();
printf("(A2) r=%d\n",r);
r = setjmp(bufferA);
if (r == 0) longjmp(bufferB, 20001);
printf("(A3) r=%d\n",r);
r = setj...
How can I get the max (or min) value in a vector?
...ame T, size_t N> const T* myend (const T (&a)[N]) { return a+N; }
int main()
{
const int cloud[] = { 1,2,3,4,-7,999,5,6 };
std::cout << *std::max_element(mybegin(cloud), myend(cloud)) << '\n';
std::cout << *std::min_element(mybegin(cloud), myend(cloud)) <&l...
C++ Returning reference to local variable
...
This code snippet:
int& func1()
{
int i;
i = 1;
return i;
}
will not work because you're returning an alias (a reference) to an object with a lifetime limited to the scope of the function call. That means once func1() returns,...
defaultdict of defaultdict?
Is there a way to have a defaultdict(defaultdict(int)) in order to make the following code work?
6 Answers
...
How do you format an unsigned long long int using printf?
...ong modifier with the u (unsigned) conversion. (Works in windows, GNU).
printf("%llu", 285212672);
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C compile error: “Variable-sized object may not be initialized”
... not a compile time constant).
You must manually initialize that array:
int boardAux[length][length];
memset( boardAux, 0, length*length*sizeof(int) );
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How to retrieve all keys (or values) from a std::map and put them into a vector?
...ionally, it moves functionality away from the call site. Which can make maintenance a little more difficult.
I'm not sure if your goal is to get the keys into a vector or print them to cout so I'm doing both. You may try something like this:
std::map<int, int> m;
std::vector<int> key, ...
How to do constructor chaining in C#
... method) to pick the overload, inside the class:
class Foo
{
private int id;
private string name;
public Foo() : this(0, "")
{
}
public Foo(int id, string name)
{
this.id = id;
this.name = name;
}
public Foo(int id) : this(id, "")
{
...
Practical uses for AtomicInteger
I sort of understand that AtomicInteger and other Atomic variables allow concurrent accesses. In what cases is this class typically used though?
...
C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...致，则运算结果的类型就是运算对象的类型。比如对两个int变量a和b做与运算，运算结果的类型还是int型。如果两个运算
对象的类型不一致，则C#要对不一致的类型进行类型转换，变成一致的类型，然后进行运算。
类型转换的...