大约有 4,300 项符合查询结果（耗时：0.0365秒） [XML]
What's the need of array with zero elements?
...
in C++ yes, in C, not needed.
– amc
Feb 8 '13 at 2:15
2
...
Why does calling a method in my derived class call the base class method?
...
Subtype polymorphism in C# uses explicit virtuality, similar to C++ but unlike Java. This means that you explicitly have to mark methods as overridable (i.e. virtual). In C# you also have to explicitly mark overriding methods as overriding (i.e. override) to prevent typos.
public class P...
Why are elementwise additions much faster in separate loops than in a combined loop?
...d1 << endl;
clock_t start = clock();
int c = 0;
while (c++ < 10000){
#if ONE_LOOP
for(int j=0;j<n;j++){
a1[j] += b1[j];
c1[j] += d1[j];
}
#else
for(int j=0;j<n;j++){
a1[j] += b1[j];
}
for(int j=...
List of Delphi language features and version in which they were introduced/deprecated
...udio docwiki:
What's new in Rad Studio 10.3 Rio
What's new in Delphi and C++Builder 10.2 Tokyo
What's new in Delphi and C++Builder 10.1 Berlin
What's new in Delphi and C++Builder 10 Seattle
What's new in Delphi and C++Builder XE8
What's New in Delphi and C++Builder XE7
What's New in Delph...
What is the purpose of a stack? Why do we need it?
...udolph That hasn't been true for almost two decades now. Just because most C++ compilers still target 90s x86 instruction set doesn't mean that x86 itself is defficient. Haswell has 168 general purpose integer registers and 168 GP AVX registers, for example - far more than any ARM CPU I know of. You...
How do you do a deep copy of an object in .NET? [duplicate]
...e of, which is probably quite close to the speed of the same thing in C or C++ (but would have to run some equivalent benchmarks to check this claim).
Demo of shallow and deep copy, using classes and MemberwiseClone:
Create Bob
Bob.Age=30, Bob.Purchase.Description=Lamborghini
...
Is multiplication and division using shift operators in C actually faster?
...urce code vs implementation
More generally, your question is tagged C and C++. As 3rd generation languages, they're specifically designed to hide the details of the underlying CPU instruction set. To satisfy their language Standards, they must support multiplication and shifting operations (and m...
What is the dependency inversion principle and why is it important?
...re pertinent to the language in view when the principle was codified (i.e. C++) which aren't relevant to newer languages. That said, the importance of the Dependency Inversion Principle primarily lies with the development of reusable software components/libraries.
A longer discussion of this princ...
Generic method multiple (OR) type constraint
...constraints and generics themselves are pretty primitive compared to, say, C++ templates. C# requires you to tell the compiler in advance what operations are allowed on generic types. The way to provide that info is to add an implements interface constraint (where T : IDisposable). But you may not w...
How do function pointers in C work?
...u have brokenly implemented is Javascript-style prototype-based OO. To get C++/Pascal-style OO, you'd need to: 1. Have a const struct for a virtual table of each class with virtual members. 2. Have pointer to that struct in polymorphic objects. 3. Call virtual methods via the virtual table, and all ...