One Note with Two Memories

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {

//華氏溫度
int Fah;
        //攝氏溫度
float Cel;


printf("input Fah:");

scanf("%i", &Fah);

//C++內的5.0是指5.0d，C內的5.0指5.0f
Cel = (Fah - 32)*(5.0f / 9);

printf("Cel is %.2f ", Cel);

return 0;
}