长度单位转换

#include<stdio.h>
#define Mile_to_meter 1609 //1英里 = 1690米
#define Foot_to_centimeter 30.48 //1英里 = 1690米
#define Inch_to_centimeter 2.54 //1英里 = 1690米
int main(){
    float mile, foot, inch;
    scanf("%f%f%f", &mile, &foot, &inch);
    printf("%fmiles = %f meters\n", mile, mile * Mile_to_meter);
    printf("%ffeet = %f centimeters\n", foot, foot * Foot_to_centimeter );
    printf("%finches = %f centimeters\n", inch, inch * Inch_to_centimeter );
    return 0;
}