constructor in c++
class A{
private:
int val;
public:
A(int x){ //one argument constructor
val=x;
}
A(){ //zero argument constructor
}
}
int main(){
A a(3);
return 0;
}constructor in c++
class A{
private:
int val;
public:
A(int x){ //one argument constructor
val=x;
}
A(){ //zero argument constructor
}
}
int main(){
A a(3);
return 0;
}formats of constructor in c++
Line::Line( double len): length(len) {
cout << "Object is being created, length = " << len << endl;
}constructor syntax in c++
struct S {
int n;
S(int); // constructor declaration
S() : n(7) {} // constructor definition.
// ": n(7)" is the initializer list
// ": n(7) {}" is the function body
};
S::S(int x) : n{x} {} // constructor definition. ": n{x}" is the initializer list
int main()
{
S s; // calls S::S()
S s2(10); // calls S::S(int)
}C++ constructor
class Book {public: Book(const char*); ~Book(); void display();private: char* name;};Copyright © 2021 Codeinu
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