#!/usr/local/bin/tcc -run
#include <stdio.h>

#define A 5
int main(void){
    
    double a = A / 2 + 1 / 10;
    double b = A / 2 + 1 / 10;
    double c = A / 2.0 + 1 / 10;
    double d = (double)A / 2 + 1.0 / 10;
    double e = A / (double)2 + 1 / 10;
    
    printf("a:%f\n",a);
    printf("b:%f\n",b);
    printf("c:%f\n",c);
    printf("d:%f\n",d);
    printf("e:%f\n",e);
    
}