将鞋码转换为英寸

#include <stdio.h>

#define ADJUST 7.31              // one kind of symbolic constant

int main(voID){
    const double SCALE = 0.333;  // another kind of symbolic constant
    double shoe, foot;
    shoe = 9.0;
    foot = SCALE * shoe + ADJUST;
    printf("Shoe size (men's)    foot length\n");
    printf("%10.1f %15.2f inches\n", shoe, foot);

    return 0;
}