initialize list in c++ code example
Example 1: initialization list c++
struct S {
int n;
S(int); // constructor declaration
S() : n(7) {} // constructor definition.
// ": n(7)" is the initializer list
};
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)
}
Example 2: c++ initialization list
class Something
{
private:
int m_value1;
double m_value2;
char m_value3;
public:
Something()
{
// These are all assignments, not initializations
m_value1 = 1;
m_value2 = 2.2;
m_value3 = 'c';
}
};
Example 3: initializer list c++
class Example {
public:
int m_A, m_B, m_C;
Example(int a, int b, int c);
};
Example::Example(int a, int b, int c):
// This is an initializer list
m_A(a),
m_B(b),
m_C(c)
{ /* Constructor code */ }