在这里,我们将讨论C ++中的统一初始化。从C ++ 11版本开始支持。统一初始化是一项功能,它允许使用一致的语法来初始化从原始类型到集合的变量和对象。换句话说,它引入了花括号初始化,该花括号初始化应用花括号({})来封装初始化程序值。
type var_name{argument_1, argument_2, .... argument_n}让我们看下面的实现以更好地理解-
#include <bits/stdc++.h>
using namespace std;
int main() {
int* pointer = new int[5]{ 10, 20, 30, 40, 50 };
cout<lt;"The contents of array are: ";
for (int i = 0; i < 5; i++)
cout << pointer[i] << " " ;
}The contents of array are: 10 20 30 40 50
#include <iostream>
using namespace std;
class MyClass {
int arr[3];
public:
MyClass(int p, int q, int r) : arr{ p, q, r } {};
void display(){
cout <<"The contents are: ";
for (int c = 0; c < 3; c++)
cout << *(arr + c) << ", ";
}
};
int main() {
MyClass ob(40, 50, 60);
ob.display();
}The contents are: 40, 50, 60,
#include <iostream>
using namespace std;
class MyClass {
int p, q;
public:
MyClass(int i, int j) : p(i), q(j) {
}
void display() {
cout << "(" <<p <<", "<< q << ")";
}
};
MyClass func(int p, int q) {
return { p, q };
}
int main() {
MyClass ob = func(40, 50);
ob.display();
}(40, 50)
#include <iostream>
using namespace std;
class MyClass {
int p, q;
public:
MyClass(int i, int j) : p(i), q(j) {
}
void display() {
cout << "(" <<p <<", "<< q << ")";
}
};
void func(MyClass p) {
p.display();
}
int main() {
func({ 40, 50 });
}(40, 50)