Double vs float C/C++

Question

Why does this code output 1 and not 2?
#include <iostream>
using namespace std;
void f(float x){cout << 2;}
void f(double x){cout << 1;}
void f(int x){cout << 3;}
int main() {
f(1.0);
return 0;
}

Answer 1

Precision numbers default by double types.. so 1.0 is double type. So it calls f(double x){}.
Use 1.0f for float type function callings...

Answer 2

Jayakrishna, ah ok, I didn’t know that, thank you!

Answer 3

purpose of this q/a section, know about..
You're welcome..