There are several ways to convert expressions in C++, depending on the type of conversion needed. Here are a few examples:
int x = 10;
double y = x; // x is implicitly converted to a double
double x = 3.14;
int y = (int) x; // x is explicitly cast to an int
stoi
(string to integer) or stod
(string to double). For example:string s = "10";
int x = stoi(s); // converts string s to integer x
to_string
. For example:int x = 10;
string s = to_string(x); // converts integer x to string s
class MyInt {
public:
int value;
MyInt(int i) : value(i) {}
operator double() { return double(value); } // user-defined conversion to double
};
MyInt x(10);
double y = x; // calls user-defined conversion from MyInt to double
Asked: 2022-01-17 11:00:00 +0000
Seen: 9 times
Last updated: Mar 31 '23