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)
}Write a C++ program using constructor
// C++ program to demonstrate the use of default constructor
#include <iostream>
using namespace std;
// declare a class
class Wall {
private:
double length;
public:
// default constructor to initialize variable
Wall() {
length = 5.5;
cout << "Creating a wall." << endl;
cout << "Length = " << length << endl;
}
};
int main() {
Wall wall1;
return 0;
}Copyright © 2021 Codeinu
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